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Innovaccer Software Developer Intern Interview Questions and Answers

Updated 16 Sep 2021

Innovaccer Software Developer Intern Interview Experiences

1 interview found

I appeared for an interview before Sep 2020.

Round 1 - Assignment 

Round duration - 7 days
Round difficulty - Easy

Web Development, Databases

Round 2 - Telephonic Call 

(2 Questions)

Round duration - 60 minutes
Round difficulty - Medium

This was the final round and was a telephonic interview.

  • Q1. 

    Implementation of HashMap with Constant Time Operations

    Design a data structure that effectively stores a key-value mapping and performs specific operations in constant time.

    Explanation:

    Your data stru...

  • Ans. 

    Design a data structure implementing HashMap with constant time operations like INSERT, DELETE, SEARCH, GET, GET_SIZE, IS_EMPTY.

    • Use a combination of hash table and linked list to achieve constant time operations.

    • For INSERT and UPDATE, hash the key to get the index and store the (key, value) pair in the linked list at that index.

    • For DELETE, SEARCH, and GET, hash the key to find the index, then traverse the linked list a...

  • Answered by AI
  • Q2. 

    Isomorphic Trees Problem Statement

    You are provided with two arbitrary binary trees. Determine if both trees are isomorphic.

    Explanation:

    Two binary trees are considered isomorphic if one tree can be tr...

  • Ans. 

    Determine if two binary trees are isomorphic by swapping left and right subtrees.

    • Check if both trees are empty, return 'yes' if they are

    • Perform the swap operation on any node at any level

    • Compare the structures of both trees after swapping to determine isomorphism

  • Answered by AI

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - Intern in NoidaEligibility criteriaNo criteriaInnovaccer interview preparation:Topics to prepare for the interview - Data Structures, Machine Learning, Web Development, Algorithms, CS fundamentalsTime required to prepare for the interview - 2 monthsInterview preparation tips for other job seekers

Tip 1 : Practice Data Structures and Algorithms from websites like leetcode,geeksforgeeks etc. 
Tip 2 : Learn one skill — be it web development, android development, or Machine Learning, make some projects on it. Don’t try to learn everything, pick 1 thing, and master it.
Tip 3 : Study computer fundamentals — DBMS, Operating Systems, OOPs, Computer Networks before your interviews.

Application resume tips for other job seekers

Tip 1 : Keep it simple and concise.
Tip 2 : Include some personal projects

Final outcome of the interviewSelected

Skills evaluated in this interview

Interview questions from similar companies

I applied via Naukri.com and was interviewed in Apr 2020. There were 5 interview rounds.

Interview Questionnaire 

2 Questions

  • Q1. I have got questions about vsam files and about SQL queries.
  • Q2. What is my previous work and project roles and responsibilities.?

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare with basics clear with your project,your work,and your roles and responsibilities and be good to make them understand what you willing to answer.

I applied via Naukri.com and was interviewed in Aug 2020. There were 4 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. My first question is tell me about yourself then they ask what you do after graduation. Then ask some technical question like oops concept and collections and map and some question in sql and jdbc also.

Interview Preparation Tips

Interview preparation tips for other job seekers - It is a product base MNC and it is good for fresher.

Interview Questionnaire 

1 Question

  • Q1. As a Asp.net developer I advise to all to have good understanding of c#. Because it is the core concept on which basis you can trackle an Interview.

Interview Preparation Tips

Round: Test
Experience: The first round had two sections. First section consisted of general aptitude and technical aptitude questions. In the second section we were given one coding question, for which we had to write the code in a language of our preference (C,C++,Java). Around 20 students were selected in the first round.

Round: Technical Interview
Experience: The second round was a technical interview. Two interviewers were present and the interview duration was 1-1.5 hours. Questions on Computer Networks, Databases, Operating Systems, Algorithms were asked. But they were more concerned about coding fundamentals especially C++ and Java. 6 students were selected in the second round.

Round: Technical Interview
Experience: Third round was again a technical interview. The interview process was same as previous second round.

Round: HR Interview
Experience: All the 6 students who were selected for the third round had a HR interview.

General Tips: The technical interview process was exhausting as the interview duration was 1-1.5 hours and challenging as they asked questions from all major fields of computer science.
Skill Tips: Prepare a decent resume and have at least 3-4 hard copies of it available with you all the times.Also do carry passport size photos with you. While going for interviews wear proper formals,carry 2-3 copies of resume and a pen.
Skills: C, Basic coding questions, Database, Data structures, Computer Networks, OS, Algorithms
College Name: NIT SURATHKAL

I appeared for an interview before Apr 2021.

Round 1 - Coding Test 

(1 Question)

Round duration - 40 minutes
Round difficulty - Medium

The test has 3 sections :
1. Quantitative contains 20 questions. These questions are easy to me. If u practice quant, you can easily solve it.


2. Technical contains 20 questions. Some questions are on C , C++ , java outputs. Remaining are based on DSA. If u Know all the time complexities of algorithms then it is easy . In technical they gave one DSA problem.
 

3. Essay: They have given one picture and then asked to write an essay by seeing the picture.

  • Q1. 

    Dijkstra's Algorithm for Shortest Path

    Given an undirected graph with 'V' vertices labeled from 0 to V-1 and 'E' edges. Each edge has a weight that represents the distance between two nodes 'X' and 'Y'.

    ...

  • Ans. 

    Dijkstra's algorithm is used to find the shortest path distances from a source node to all other vertices in a graph.

    • Dijkstra's algorithm is a greedy algorithm that finds the shortest path from a source node to all other nodes in a graph.

    • It uses a priority queue to select the node with the smallest distance and relaxes its neighbors.

    • The algorithm maintains a distance array to keep track of the shortest distances from t...

  • Answered by AI
Round 2 - Face to Face 

(3 Questions)

Round duration - 60 minutes
Round difficulty - Easy

3 persons are there in panel. They are asking questions on basic concepts in subjects and some advanced concepts.

  • Q1. What is a Daemon Process?
  • Ans. 

    A daemon process is a background process that runs continuously to perform system tasks.

    • Daemon processes do not have a controlling terminal.

    • They typically run in the background and perform tasks such as managing hardware devices, network services, or system maintenance.

    • Examples of daemon processes include cron, sshd, and apache.

    • Daemon processes are often started during system boot and run until the system is shut down.

  • Answered by AI
  • Q2. What are the advantages of system calls in operating systems?
  • Ans. 

    System calls provide a way for user-level processes to interact with the operating system kernel.

    • System calls allow user programs to request services from the operating system.

    • They provide a secure and controlled way for applications to access system resources.

    • System calls enable processes to perform tasks such as file operations, network communication, and process management.

    • Examples of system calls include open(), re

  • Answered by AI
  • Q3. Can you explain the select() system call?
  • Ans. 

    The select() system call is used in Unix-like operating systems to monitor multiple file descriptors for activity.

    • select() allows a program to wait for multiple I/O operations to complete on multiple file descriptors.

    • It takes three sets of file descriptors as arguments - readfds, writefds, and errorfds.

    • The function will block until an activity is detected on one of the file descriptors or until a timeout occurs.

    • select(...

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPADE Shaw India interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 6 monthsInterview preparation tips for other job seekers

Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.

Application resume tips for other job seekers

Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.

Final outcome of the interviewSelected

Skills evaluated in this interview

I appeared for an interview before Apr 2021.

Round 1 - Face to Face 

(2 Questions)

Round duration - 45 minutes
Round difficulty - Medium

Technical Interview round with questions on DSA.

  • Q1. 

    Binary Tree Mirror Conversion Problem

    Given a binary tree, your task is to convert it into its mirror tree.

    A binary tree is a data structure where each parent node has at most two children.

    The mirror ...

  • Ans. 

    Convert a binary tree into its mirror tree by interchanging left and right children of non-leaf nodes.

    • Traverse the binary tree in postorder fashion and swap the left and right children of each non-leaf node.

    • Use recursion to solve the problem efficiently.

    • Remember to handle null child nodes represented by -1 in the input.

  • Answered by AI
  • Q2. 

    Maximum Sum Subarray Problem Statement

    Given an array of integers, find the maximum sum of any contiguous subarray within the array.

    Example:

    Input:
    array = [34, -50, 42, 14, -5, 86]
    Output:
    137
    Exp...
  • Ans. 

    Find the maximum sum of any contiguous subarray within an array in O(N) time complexity.

    • Iterate through the array and keep track of the maximum sum of subarrays encountered so far

    • At each index, decide whether to include the current element in the subarray or start a new subarray

    • Update the maximum sum if a new maximum is found

    • Example: For array [34, -50, 42, 14, -5, 86], the maximum sum subarray is [42, 14, -5, 86] with

  • Answered by AI
Round 2 - Face to Face 

(2 Questions)

Round duration - 45 minutes
Round difficulty - Hard

Technical Interview round with questions on DSA.

  • Q1. 

    Find the Largest BST Subtree in a Given Binary Tree

    Your task is to determine the size of the largest subtree of a given binary tree which is also a Binary Search Tree (BST).

    BST Definition:

    • The left...
  • Ans. 

    Find the size of the largest subtree in a binary tree that is also a Binary Search Tree (BST).

    • Traverse the binary tree in a bottom-up manner to check if each subtree is a BST.

    • Keep track of the size of the largest BST subtree encountered so far.

    • Use the properties of a BST to determine if a subtree is a valid BST.

    • Consider edge cases such as empty tree or single node tree.

    • Example: For input 1 2 3 4 -1 5 6 -1 7 -1 -1 -1 -1

  • Answered by AI
  • Q2. 

    Next Higher and Previous Lower Number with Same Number of Set Bits

    Given a positive integer n, the task is to find the next smallest integer and the previous largest integer that contain the exact same nu...

  • Ans. 

    Find next smallest and previous largest integers with same number of set bits as given integer.

    • Count the number of set bits in the given integer using bitwise operations.

    • For next smallest integer, find the next number with same number of set bits by iterating through numbers greater than the given integer.

    • For previous largest integer, find the previous number with same number of set bits by iterating through numbers sm

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPADE Shaw India interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 5 monthsInterview preparation tips for other job seekers

Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.

Application resume tips for other job seekers

Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.

Final outcome of the interviewRejected

Skills evaluated in this interview

Interview Questionnaire 

12 Questions

  • Q1. Find maximum length BST in a given binary tree?
  • Ans. 

    To find the maximum length BST in a given binary tree.

    • Traverse the tree in post-order fashion

    • For each node, check if it satisfies the BST property

    • If it does, calculate the size of the BST rooted at that node

    • Keep track of the maximum size seen so far

  • Answered by AI
  • Q2. Write an algorithm to find the absolute max subsequence of an array containing both positive and negative numbers in O(n) time ?
  • Ans. 

    Algorithm to find absolute max subsequence of an array with positive and negative numbers in O(n) time.

    • Initialize max_so_far and max_ending_here as 0

    • Loop through the array and for each element, add it to max_ending_here

    • If max_ending_here becomes negative, reset it to 0

    • If max_ending_here is greater than max_so_far, update max_so_far

    • Return max_so_far

  • Answered by AI
  • Q3. Given an array eliminate the duplicates and print it. Linear time complexity?
  • Ans. 

    Eliminate duplicates in an array of strings and print it in linear time complexity.

    • Use a hash set to keep track of unique elements

    • Iterate through the array and add non-duplicate elements to the hash set

    • Print the hash set elements to get the final array

  • Answered by AI
  • Q4. Balancing of Btrees / AVL trees?
  • Ans. 

    Balancing of Btrees / AVL trees is important for efficient search and insertion operations.

    • Btrees and AVL trees are self-balancing binary search trees.

    • Balancing ensures that the height of the tree is minimized, leading to faster search and insertion operations.

    • Btrees are used in databases while AVL trees are used in memory.

    • Balancing is achieved by performing rotations and node splitting.

    • AVL trees have a stricter balanc...

  • Answered by AI
  • Q5. Two cops and a robber are located on opposite corners of a cube and move along its edges. They all move at the same rate. Is it possible for the cops to catch the robber. [Each of the 3 people can see each...
  • Q6. In some tournament 139 teams have participated. Tournament is knock out. what is the number of matches to choose the champion to be held?
  • Ans. 

    139 teams in a knock-out tournament, find the number of matches to choose the champion.

    • In a knock-out tournament, each team plays only one match per round.

    • The number of matches required to choose the champion is one less than the number of teams.

    • Therefore, the number of matches required is 138.

  • Answered by AI
  • Q7. OS concepts – Threading, Deadlocks, Paging etc
  • Q8. Databases Questions – Transactions, ACID etc
  • Q9. Project details in your resume?
  • Ans. 

    My resume includes projects such as a web-based inventory management system and a mobile app for tracking fitness goals.

    • Developed a web-based inventory management system using PHP and MySQL

    • Created a mobile app for tracking fitness goals using React Native

    • Implemented RESTful APIs for communication between front-end and back-end

    • Utilized version control tools such as Git for collaborative development

    • Designed and implement...

  • Answered by AI
  • Q10. Given a 7mt long gold bar , need to cut and give to worker for 7 days (1 meter long) How many min cuts?
  • Q11. Write algo to mirror a given Binary Tree?
  • Ans. 

    Algorithm to mirror a given Binary Tree

    • Create a function to swap left and right child nodes of a given node

    • Recursively call the function on left and right child nodes

    • Base case: if node is null, return

    • Call the function on the root node of the binary tree

  • Answered by AI
  • Q12. Find the next largest int of a given int such that it has same number of 1′s in binary?
  • Ans. 

    Find the next largest int with same number of 1's in binary.

    • Count the number of 1's in the binary representation of the given int.

    • Increment the given int until a number with the same number of 1's is found.

    • Return the next largest int with same number of 1's.

  • Answered by AI

Interview Preparation Tips

Skills: C,C++ , JAVA , Finding output, Basic Concepts
College Name: NA

Skills evaluated in this interview

Interview Questionnaire 

21 Questions

  • Q1. Hobbies and interests
  • Q2. Questions regarding java
  • Q3. OOP concepts in Java
  • Ans. 

    OOP concepts in Java

    • Encapsulation - hiding implementation details

    • Inheritance - creating new classes from existing ones

    • Polymorphism - ability of objects to take on multiple forms

    • Abstraction - focusing on essential features and ignoring the rest

    • Example: A Car class can inherit from a Vehicle class

    • Example: A Dog class can have a bark() method that overrides the Animal class's makeSound() method

    • Example: A Shape class can h...

  • Answered by AI
  • Q4. OOP Java Design problems
  • Ans. 

    Answering OOP Java design problems

    • Identify the problem domain and create a class hierarchy

    • Use encapsulation to hide implementation details

    • Apply inheritance to reuse code and create subtypes

    • Implement polymorphism to allow objects to take on multiple forms

    • Avoid tight coupling and favor composition over inheritance

    • Use design patterns to solve common problems

    • Consider SOLID principles for maintainable code

  • Answered by AI
  • Q5. C++ Virtual Functions
  • Q6. What is the difference between C and C++?
  • Ans. 

    C++ is an extension of C with object-oriented programming features.

    • C++ supports classes and objects while C does not.

    • C++ has better support for polymorphism and inheritance.

    • C++ has a standard template library (STL) which C does not have.

    • C++ allows function overloading while C does not.

    • C++ has exception handling while C does not.

  • Answered by AI
  • Q7. What is inheritance?
  • Ans. 

    Inheritance is a mechanism in object-oriented programming where a new class is created by inheriting properties of an existing class.

    • Inheritance allows code reusability and saves time and effort in programming.

    • The existing class is called the superclass or parent class, and the new class is called the subclass or child class.

    • The subclass inherits all the properties and methods of the superclass and can also add its own...

  • Answered by AI
  • Q8. What is the difference between default and copy constructor?
  • Ans. 

    Default constructor is provided by the compiler if no constructor is defined. Copy constructor creates a new object by copying an existing object.

    • Default constructor initializes member variables to default values.

    • Copy constructor creates a new object with the same values as an existing object.

    • Default constructor is called automatically by the compiler if no constructor is defined.

    • Copy constructor is called when an obje...

  • Answered by AI
  • Q9. What are access specifiers?
  • Ans. 

    Access specifiers are keywords in object-oriented programming languages that determine the visibility and accessibility of class members.

    • Access specifiers are used to restrict access to class members.

    • There are three types of access specifiers: public, private, and protected.

    • Public members can be accessed from anywhere in the program.

    • Private members can only be accessed within the class.

    • Protected members can be accessed...

  • Answered by AI
  • Q10. What is library functions?
  • Ans. 

    Library functions are pre-written code that can be reused to perform common tasks.

    • Library functions save time and effort by providing pre-written code.

    • They are often included in programming languages or external libraries.

    • Examples include functions for string manipulation, mathematical calculations, and file input/output.

    • Library functions can be called from within a program to perform specific tasks.

    • They can also be cu

  • Answered by AI
  • Q11. What is the difference between DML and DLL?
  • Ans. 

    DML is Data Manipulation Language used to manipulate data in a database. DLL is Data Definition Language used to define database schema.

    • DML is used to insert, update, delete data in a database.

    • DLL is used to create, alter, drop database objects like tables, views, indexes.

    • DML statements include INSERT, UPDATE, DELETE.

    • DLL statements include CREATE, ALTER, DROP.

    • DML affects data in a database, DLL affects the structure of

  • Answered by AI
  • Q12. What is the difference between primary key and unique key?
  • Ans. 

    Primary key uniquely identifies a record in a table, while unique key ensures that all values in a column are distinct.

    • Primary key can't have null values, while unique key can have one null value.

    • A table can have only one primary key, but multiple unique keys.

    • Primary key is used as a foreign key in other tables, while unique key is not.

    • Example: Primary key - employee ID, Unique key - email address.

  • Answered by AI
  • Q13. What is a stack?
  • Ans. 

    A stack is a data structure that follows the Last-In-First-Out (LIFO) principle.

    • Elements are added to the top of the stack and removed from the top.

    • Common operations include push (add element) and pop (remove element).

    • Stacks can be implemented using arrays or linked lists.

    • Examples include the call stack in programming and the undo/redo feature in text editors.

  • Answered by AI
  • Q14. What is an Assembly?
  • Ans. 

    Assembly is a low-level programming language that is used to write programs that can directly interact with computer hardware.

    • Assembly language is specific to a particular computer architecture.

    • It is a low-level language that is difficult to read and write.

    • Assembly language programs are faster and more efficient than programs written in high-level languages.

    • Examples of assembly language include x86, ARM, and MIPS.

    • Assem...

  • Answered by AI
  • Q15. What are class access modifiers?
  • Ans. 

    Class access modifiers are keywords used to control the visibility and accessibility of class members.

    • There are four access modifiers in Java: public, private, protected, and default

    • Public members can be accessed from anywhere

    • Private members can only be accessed within the same class

    • Protected members can be accessed within the same class, subclasses, and same package

    • Default members can be accessed within the same packa

  • Answered by AI
  • Q16. What is serialization?
  • Ans. 

    Serialization is the process of converting an object into a format that can be stored or transmitted.

    • Serialization is used to save the state of an object and recreate it later.

    • It is commonly used in network communication to transmit data between different systems.

    • Examples of serialization formats include JSON, XML, and binary formats like Protocol Buffers.

    • Deserialization is the opposite process of converting serialized

  • Answered by AI
  • Q17. What is the purpose of Normalisation?
  • Ans. 

    Normalisation is the process of organizing data in a database to reduce redundancy and improve data integrity.

    • Normalisation helps to eliminate data redundancy and inconsistencies

    • It ensures that each piece of data is stored in only one place

    • It helps to improve data integrity and accuracy

    • It makes it easier to maintain and update the database

    • There are different levels of normalisation, each with its own set of rules and g

  • Answered by AI
  • Q18. What is the difference between Truncate and Delete?
  • Ans. 

    Truncate removes all data from a table while Delete removes specific data from a table.

    • Truncate is faster than Delete as it doesn't log individual row deletions.

    • Truncate resets the identity of the table while Delete doesn't.

    • Truncate can't be rolled back while Delete can be.

    • Truncate doesn't fire triggers while Delete does.

  • Answered by AI
  • Q19. What is the difference between DBMS and RDBMs?
  • Ans. 

    DBMS is a software system to manage databases while RDBMS is a type of DBMS that uses a relational model.

    • DBMS stands for Database Management System while RDBMS stands for Relational Database Management System.

    • DBMS can manage any type of database while RDBMS uses a relational model to manage data.

    • DBMS does not enforce any specific data model while RDBMS enforces a relational data model.

    • Examples of DBMS include MongoDB, ...

  • Answered by AI
  • Q20. What is Recursion Function?
  • Ans. 

    Recursion function is a function that calls itself until a base condition is met.

    • Recursion is a technique used to solve problems by breaking them down into smaller sub-problems.

    • It involves a function calling itself with a modified input until a base case is reached.

    • Recursion can be used to solve problems such as factorial, Fibonacci series, and binary search.

    • Recursion can be implemented using loops as well, but it may ...

  • Answered by AI
  • Q21. Interview with the Director

Interview Preparation Tips

Round: Test
Experience: Initially they took an online round but due to some network problem, they had to scrap it. Next morning, they came up with a paper based round. There were 2 sections. One was aptitude and one was coding, both being objective type. The aptitude section was as lengthy as difficult. No one could have solved all 30 questions in 30 minutes time. Infact, I was only able to attempt 10. Next 40 minutes or so was reserved for the coding test. The questions they asked covered almost all the topics they mentioned in their pre-placement presentation. But the maximum number of questions were related to getting output or finding errors in C, C++ and JAVA codes. The questions they asked from theoretical subjects were more or less the basics and easy. In those questions (which were quite a few in number), you will be given a huge chunk of code with some part missing and you have to identify which snippet among the options best fits in there. Sometimes its given what the code is supposed to do, but in some questions it was also your task to find out. So I think the differentiating factor is how well your actual coding skills are. And you need to know these 3 languages atleast – C, C++ and JAVA. Again, similar to aptitude section the coding section was also very lengthy with some programs extending upto 1 or more pages. I’d recommend to skip those programs initially and jump to other easy problems first. Then if you have time, you can come back and attempt them.In the end of the coding round, they had one special subjective test in which they asked you to write the full code in any language for the give problem statement. In my case, the problem was : “Given a tree, find the depth of the largest binary search tree it contains.” I know it sounds simple enough but only until you start coding it. And while writing codes of such problems, make sure to display your data-structures and algorithmic skills and not your knowledge of STL libraries. Even if you’re not able to solve the problem and you used some complicated data structures (by using, I mean you created them from scratch without any help from STL libraries) and some good algorithms, then they are likely to appreciate your coding skills if not your problem-solving skills. And just a hint although I think you already know this – BST are the favourites of all software companies . Overall, I sat for 2 companies including Amazon and both of them had a coding problem related to BST only.
Duration: 70 minutes
Total Questions: 2

Round: HR Interview
Experience: Anyways, then there were usual HR questions like your hobbies, interests, family background, history of my town, etc. He did ask me some technical questions also like on seeing the word ‘Hacking’ in my resume, we started discussing upon hacking, its types and laws related to it.

Round: Technical Interview
Experience: They started off with puzzles, which were quite easy and common ones. Then only after 2 puzzles they started asking me about my favourite subject and language. I told them OS, Networks and C++. But instead they asked me all about Java ! I kept telling them I hadn’t revised Java but that didn’t help. They’ll ask some question and I’ll write the code in C++ and they would ask me to convert it to Java. They’d also ask the equivalents of C++ OOP concepts in Java. Its not that I know nothing of Java, I have actually done a lot of coding in it, but that day and time, I was totally unprepared. So I kept guessing a lot based on my poor memory and later to my surprise, I found I got many of them right .They also asked some design questions in which they asked me to write the class and related functions (just the prototypes) for implementing a parking lot management system. Then there were questions on hacking and security. They also asked about the network problem they faced the previous day when the online round was going on, due to which they had to scrap it. They asked what could be the reason behind it and what could be the solution. Overall, again the majority of the questions were coding type with C++ concepts like virtual functions, JAVA OOP, and design problems. This round went on for 15-20 minutes past 1 hour or so.

Round: Behavioural Interview
Experience: Finally, after few hours I was called for my last interview round. It was more like a casual round in which the D.E.Shaw associate director was taking my interview. The first thing he said was “I just wanted to meet you once myself” and he asked a few HR questions again. He asked me if I had any higher studies plan, my strengths and 2 weaknesses, why their company, etc. It was a cool round with the atmosphere also easy and it went on for just 20 minutes or so.

Skill Tips: Criteria :Cs/IT/ECE And CGPA min of 7.0[CSE] .For ECE =7.5
D. E. Shaw generally prefers computer science branch students but they’re not as strict as Amazon or Google and for for CS students it was only 7.0 . Luckily, my CGPA was above the cutoff and I was allowed to sit for the process.
Skills: C++, Java, DBMS, OOP
College Name: BITS PILANI

Skills evaluated in this interview

Interview Questionnaire 

19 Questions

  • Q1. Introduce yourself
  • Ans. 

    I am a software developer with experience in Java and Python.

    • Proficient in Java and Python programming languages

    • Experience in developing web applications using Spring framework

    • Familiarity with database management systems such as MySQL and MongoDB

  • Answered by AI
  • Q2. Tell me more about your achievements
  • Ans. 

    I have achieved success in developing and implementing various software solutions.

    • Developed a web application that increased user engagement by 30%

    • Implemented a new feature that reduced system downtime by 50%

    • Created a mobile app that received 4.5-star rating on app stores

    • Led a team of developers to successfully complete a project within a tight deadline

  • Answered by AI
  • Q3. What sort of projects do you work on ?
  • Ans. 

    I work on a variety of projects ranging from web development to mobile app development.

    • Web development using HTML, CSS, JavaScript, and various frameworks such as React and Angular

    • Mobile app development for iOS and Android using Swift, Kotlin, and React Native

    • Database design and management using SQL and NoSQL databases such as MySQL and MongoDB

    • API development and integration using REST and GraphQL

    • Machine learning proje...

  • Answered by AI
  • Q4. What is the difference between a hardworker and a smartworker?
  • Ans. 

    A hardworker puts in more effort, while a smartworker works efficiently and effectively.

    • A hardworker may spend more time on a task, while a smartworker finds ways to complete it faster.

    • A hardworker may rely on brute force, while a smartworker uses their skills and knowledge to solve problems.

    • A hardworker may struggle with prioritization, while a smartworker knows how to focus on the most important tasks.

    • A hardworker ma...

  • Answered by AI
  • Q5. What makes you say that you are more of a developer than an analyst ?( I was asked for choice )
  • Q6. Why is Zuckerburg in news these days?
  • Ans. 

    Zuckerberg is in news due to Facebook's handling of user data and misinformation.

    • Facebook's role in the 2016 US Presidential election

    • Cambridge Analytica scandal

    • Testimony before US Congress

    • Ongoing debate on social media regulation

  • Answered by AI
  • Q7. Tell me about yourself
  • Ans. 

    I am a software developer with experience in Java and Python.

    • I have a Bachelor's degree in Computer Science.

    • I have worked on various projects involving web development and data analysis.

    • I am proficient in Java and Python programming languages.

    • I am a quick learner and enjoy working in a team environment.

  • Answered by AI
  • Q8. Which is your favourite project (among mentioned in resume) and why?
  • Ans. 

    My favorite project is the e-commerce website I developed for a local business.

    • I enjoyed working on the front-end design and user experience.

    • I implemented a secure payment gateway and order tracking system.

    • The website increased the business's online sales by 50%.

    • I received positive feedback from the client and their customers.

  • Answered by AI
  • Q9. OOPs concepts
  • Q10. Explain inheritance
  • Ans. 

    Inheritance is a mechanism in object-oriented programming where a new class is created by inheriting properties of an existing class.

    • Inheritance allows code reuse and promotes code organization.

    • The existing class is called the parent or superclass, and the new class is called the child or subclass.

    • The child class inherits all the properties and methods of the parent class and can also add its own unique properties and ...

  • Answered by AI
  • Q11. Difference between finally , finalize and final
  • Ans. 

    finally is a keyword used in try-catch block, finalize is a method in Object class, and final is a keyword used for declaring constants.

    • finally is used to execute a block of code after try-catch block

    • finalize is called by garbage collector before destroying an object

    • final is used to declare a constant variable or to make a class uninheritable

  • Answered by AI
  • Q12. Private vs final keyword in considerance with member functions in an application offered to the user
  • Ans. 

    Private keyword restricts access to member functions within the class while final keyword prevents overriding of functions.

    • Private keyword is used to hide the implementation details of a class from the user.

    • Final keyword is used to prevent the user from overriding a function in a subclass.

    • Using private and final keywords together can ensure that the implementation details of a class are not modified by the user.

  • Answered by AI
  • Q13. Write an interface
  • Ans. 

    An interface defines a set of methods that a class must implement.

    • An interface is declared using the 'interface' keyword.

    • All methods in an interface are public and abstract by default.

    • A class can implement multiple interfaces.

    • Interfaces can also extend other interfaces.

    • Example: public interface MyInterface { void myMethod(); }

  • Answered by AI
  • Q14. Difference between Abstract class and Interface
  • Ans. 

    Abstract class is a class with some implementation while Interface is a contract with no implementation.

    • Abstract class can have constructors while Interface cannot

    • Abstract class can have non-abstract methods while Interface cannot

    • A class can implement multiple interfaces but can only inherit from one abstract class

    • Abstract class is used when there is a need for common functionality among related classes while Interface...

  • Answered by AI
  • Q15. Inheritance types in Java
  • Ans. 

    Inheritance types in Java

    • Java supports single and multiple inheritance through classes and interfaces respectively

    • Single inheritance is when a class extends only one parent class

    • Multiple inheritance is when a class implements multiple interfaces

    • Java also supports hierarchical inheritance where multiple classes extend a single parent class

    • Java does not support multiple inheritance through classes to avoid the diamond pr

  • Answered by AI
  • Q16. Order of multiple catch blocks in a single try block in java. Will it compile if the general catch was before the specific one?
  • Ans. 

    Order of catch blocks in a try block in Java

    • Specific catch blocks should come before general catch blocks

    • If general catch block comes before specific catch block, it will result in a compile-time error

    • If multiple catch blocks are present, only the first matching catch block will be executed

  • Answered by AI
  • Q17. What do you know about Garbage collection
  • Ans. 

    Garbage collection is an automatic memory management process that frees up memory occupied by objects that are no longer in use.

    • Garbage collection is used in programming languages like Java, C#, and Python.

    • It helps prevent memory leaks and reduces the risk of crashes due to memory exhaustion.

    • Garbage collection works by identifying objects that are no longer in use and freeing up the memory they occupy.

    • There are differe...

  • Answered by AI
  • Q18. Write code for connecting a java application to the database
  • Ans. 

    Code for connecting a Java application to a database

    • Import the JDBC driver for the specific database

    • Create a connection object using the DriverManager class

    • Create a statement object to execute SQL queries

    • Execute the query and retrieve the results

    • Close the connection and release resources

  • Answered by AI
  • Q19. What is JSON?
  • Ans. 

    JSON stands for JavaScript Object Notation, a lightweight data interchange format.

    • JSON is used to transmit data between a server and a web application, as an alternative to XML.

    • It is easy to read and write for humans and easy to parse and generate for machines.

    • JSON is a text format that is completely language independent but uses conventions that are familiar to programmers of the C family of languages.

    • Example: {"name"

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience: The test had 50 questions which were to be answered in 50 minutes. The test is not very difficult if you got basic skills in aptitude, but the most important thing is managing time. The level of difficulty was moderate.
Tips: Do not waste time on verbal questions which have a direct answer ( synonyms and antonyms) which you are not very sure of.
Just try making a smart guess when you have a doubt by elimination or something.
Duration: 50 minutes
Total Questions: 50

Round: HR Interview
Experience: I wouldn't say it went great but it was fine. I did not think I would clear it as for most of the questions the interviewer seemed disappointed and wanted more out of me.
Tips: Keep smiling.
Only put things which you are thorough about, in your resume.
The interviewer too doesn't know everything, so just be confident in whatever you say-the interviewer might get convinced.

Round: Technical Interview
Experience: The interviewer was really cool. He realized that I mostly work on java applications so he chose to ask me stuff related to that.
He didn't want me to know the answer well but just wanted me to approach to it, maybe think more.
He went through my resume back and forth and asked mostly about all my projects and their logic and how could I take them to the next level.
Tips: Be confident.
Its okay not to know any answer, just try giving it a shot in the approach.

Skills: Object Oriented Programming (OOP) Basics, Basics Of Machine Learning, Ability To Analyse, Ability To Think Of Creative Solutions, Ability To Think Beyond Boundaries, Ability To Convince, Database Management, Java Programming
College Name: Amrita School Of Engineering, Coimbatore
Funny Moments: I had mentioned Japanese as languages known in my resume. During the HR interview , I was asked to tell "How are you ?" in Japanese. I knew that the interviewer didn't know any of that language but I was a little scared to just tell anything.
You could try giving a shot in a similar situation :P

Skills evaluated in this interview

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