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EMIS Group Interview Questions and Answers

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I appeared for an interview before Apr 2021.

Round 1 - Coding Test 

(2 Questions)

Round duration - 60 minutes
Round difficulty - Easy

The second round is also written but you need to write programming based on their concept.

  • Q1. 

    Prime Numbers Identification

    Given a positive integer N, your task is to identify all prime numbers less than or equal to N.

    Explanation:

    A prime number is a natural number greater than 1 that has no po...

  • Q2. 

    Palindrome String Validation

    Determine if a given string 'S' is a palindrome, considering only alphanumeric characters and ignoring spaces and symbols.

    Note:
    The string 'S' should be evaluated in a case...
Round 2 - Face to Face 

(6 Questions)

Round duration - 60 minutes
Round difficulty - Easy

Technical round with questions mainly on Java and OOPS concepts.

  • Q1. What is the difference between static methods and instance methods in Java?
  • Ans. 

    Static methods belong to the class itself, while instance methods belong to individual objects of the class.

    • Static methods are called using the class name, while instance methods are called using object references.

    • Static methods cannot access instance variables directly, while instance methods can access both static and instance variables.

    • Static methods are shared among all instances of the class, while instance method...

  • Answered by AI
  • Q2. What is the difference between an abstract class and an interface in Java?
  • Q3. What is the difference between ClassNotFoundException and NoClassDefFoundError in Java?
  • Ans. 

    ClassNotFoundException occurs when a class is not found during runtime, while NoClassDefFoundError occurs when a class was found during compilation but not during runtime.

    • ClassNotFoundException is a checked exception, while NoClassDefFoundError is an Error.

    • ClassNotFoundException occurs when a class is not found at runtime, usually due to a missing classpath or incorrect class name.

    • NoClassDefFoundError occurs when a cla...

  • Answered by AI
  • Q4. What is the difference between an Error and an Exception in Java?
  • Ans. 

    Error is a serious issue that cannot be handled at runtime, while Exception is a recoverable issue that can be caught and handled.

    • Error is a subclass of Throwable and is usually caused by the environment or system, such as running out of memory or stack overflow.

    • Exception is also a subclass of Throwable but is caused by the application code, such as invalid input or file not found.

    • Errors are unchecked and are not meant...

  • Answered by AI
  • Q5. What is SerialVersionUID in Java?
  • Ans. 

    SerialVersionUID is a unique identifier used by Java to ensure the compatibility of serialized objects.

    • SerialVersionUID is a static final long variable in a class that implements Serializable interface.

    • It is used to ensure that the serialized object can be deserialized correctly even if the class definition has changed.

    • If the SerialVersionUID of the serialized object does not match the one in the class, an InvalidClass...

  • Answered by AI
  • Q6. What are the requirements for creating an immutable class in Java?
  • Ans. 

    Requirements for creating an immutable class in Java

    • Make the class final so it cannot be extended

    • Make all fields private and final

    • Do not provide setter methods, only getter methods

    • Ensure that mutable objects are not returned in getter methods

    • Override equals() and hashCode() methods for proper comparison

    • Consider making defensive copies of mutable fields in constructor or getter methods

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAYodlee interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 4 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 - Coding Test 

(2 Questions)

Round duration - 90 minutes
Round difficulty - Easy

It was on online objective test consisting of 4 sections: Aptitude, Technical MCQs, Code snippet based MCQs and Coding part.

  • Q1. 

    Valid Parentheses Problem Statement

    Given a string 'STR' consisting solely of the characters “{”, “}”, “(”, “)”, “[” and “]”, determine if the parentheses are balanced.

    Input:

    The first line contains an...
  • Q2. 

    Palindrome Linked List Problem Statement

    Determine if a given singly linked list of integers is a palindrome. Return true if it is a palindrome, otherwise return false.

    Example:

    Input:
    1 -> 2 -> ...
  • Ans. 

    Check if a given singly linked list of integers is a palindrome.

    • Use two pointers to find the middle of the linked list.

    • Reverse the second half of the linked list.

    • Compare the first half with the reversed second half to determine if it is a palindrome.

  • Answered by AI
Round 2 - Face to Face 

(3 Questions)

Round duration - 60 minutes
Round difficulty - Easy

This was a technical and managerial round. The interviewer gave me a situation where I am in testing team and I found that customer requirement was drop down list at a place but developer has used bullet selection, and is not ready to change it. How will you manage? I gave some good replies and he was convinced.

  • Q1. What is a virtual function?
  • Q2. Can you explain how to perform a level order traversal of a binary tree in spiral form?
  • Q3. What are abstract classes in C++?
  • Ans. 

    Abstract classes in C++ are classes that cannot be instantiated and are designed to be base classes for other classes.

    • Abstract classes may contain pure virtual functions, making them incomplete and unable to be instantiated.

    • Derived classes must implement all pure virtual functions from the abstract class in order to be concrete classes.

    • Abstract classes can have non-virtual functions and member variables like regular cl...

  • Answered by AI
Round 3 - Face to Face 

(6 Questions)

Round duration - 60 minutes
Round difficulty - Easy

This was also a technical round. He asked to optimize the code I wrote in coding round. Then he asked me a few puzzles and questions on OOPS, OS and DBMS.

  • Q1. Can you explain the ACID properties in the context of database management systems?
  • Q2. What is the difference between paging and segmentation in operating systems?
  • Ans. 

    Paging and segmentation are memory management techniques in operating systems.

    • Paging divides physical memory into fixed-size blocks called pages, while segmentation divides logical memory into variable-size segments.

    • Paging allows for efficient memory allocation and management, while segmentation provides protection and sharing of memory.

    • Paging is simpler to implement but can lead to internal fragmentation, while segmen...

  • Answered by AI
  • Q3. What is concurrency control?
  • Ans. 

    Concurrency control is a technique used in databases to manage simultaneous access and modification of data by multiple users or processes.

    • Concurrency control ensures that transactions are executed in a way that maintains data consistency and integrity.

    • Techniques like locking, timestamp ordering, and optimistic concurrency control are used to implement concurrency control.

    • For example, in a banking system, concurrency c...

  • Answered by AI
  • Q4. What is the difference between String Buffer and String Builder in Java?
  • Ans. 

    String Buffer is synchronized and thread-safe, while String Builder is not synchronized and faster.

    • String Buffer is synchronized, making it thread-safe for use in multi-threaded environments.

    • String Builder is not synchronized, resulting in faster performance but not thread-safe.

    • String Builder is preferred for single-threaded operations, while String Buffer is preferred for multi-threaded operations.

  • Answered by AI
  • Q5. What are smart pointers in C++?
  • Ans. 

    Smart pointers in C++ are objects that act like pointers but provide automatic memory management.

    • Smart pointers help prevent memory leaks by automatically managing memory allocation and deallocation.

    • Examples include unique_ptr, shared_ptr, and weak_ptr.

    • unique_ptr is used for exclusive ownership, shared_ptr for shared ownership, and weak_ptr to prevent circular references.

  • Answered by AI
  • Q6. What is the difference between a mutex and a semaphore?

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAYodlee interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 4 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

Interview Questionnaire 

9 Questions

  • Q1. Questions related to the work done at my previous company
  • Q2. Find if a given directed graph is cyclic or not
  • Ans. 

    To check if a directed graph is cyclic or not

    • Use Depth First Search (DFS) algorithm to traverse the graph

    • Maintain a visited set to keep track of visited nodes

    • Maintain a recursion stack to keep track of nodes in the current DFS traversal

    • If a node is visited and is already in the recursion stack, then the graph is cyclic

    • If DFS traversal completes without finding a cycle, then the graph is acyclic

  • Answered by AI
  • Q3. You have a stream of bytes from which you can read one byte at a time. You only have enough space to store one byte. After processing those bytes, you have to return a random byte. Note: The probability of...
  • Ans. 

    Return a random byte from a stream of bytes with equal probability.

    • Create a variable to store the count of bytes read

    • Create a variable to store the current random byte

    • For each byte read, generate a random number between 0 and the count of bytes read

    • If the random number is 0, store the current byte as the random byte

    • Return the random byte

  • Answered by AI
  • Q4. Find if a given Binary Tree is BST or not
  • Q5. Devise an algorithm to determine the Nth-to-Last element in a singly linked list of unknown length. If N = 0, then your algorithm must return the last element. You should parse the list only once
  • Ans. 

    Algorithm to find Nth-to-Last element in a singly linked list of unknown length

    • Traverse the list and maintain two pointers, one at the beginning and one at Nth node from beginning

    • Move both pointers simultaneously until the second pointer reaches the end of the list

    • The first pointer will be pointing to the Nth-to-Last element

    • If N=0, return the last element

    • Parse the list only once

  • Answered by AI
  • Q6. Given an array of integers, print all possible permutations. Also explain your approach
  • Ans. 

    Print all possible permutations of an array of integers

    • Use recursion to swap elements and generate permutations

    • Start with the first element and swap it with each subsequent element

    • Repeat the process for the remaining elements

    • Stop when all elements have been swapped with the first element

    • Print each permutation as it is generated

  • Answered by AI
  • Q7. Design a Stack DS that also prints in O(1) the minimum element you pushed in the stack
  • Ans. 

    Design a stack that prints the minimum element pushed in O(1)

    • Use two stacks, one for storing elements and another for storing minimums

    • When pushing an element, compare it with the top of minimum stack and push the smaller one

    • When popping an element, pop from both stacks

    • To get the minimum element, just return the top of minimum stack

  • Answered by AI
  • Q8. Given a linked list with loop, how would you find the starting point of the loop ?
  • Ans. 

    To find the starting point of a loop in a linked list, use Floyd's cycle-finding algorithm.

    • Use two pointers, one moving at twice the speed of the other.

    • When they meet, move one pointer to the head of the list and keep the other at the meeting point.

    • Move both pointers one step at a time until they meet again, which is the starting point of the loop.

  • Answered by AI
  • Q9. Find a number a matrix mat[m][n] where all the rows and columns are sorted non-decreasingly. What will be the complexity of the solution
  • Ans. 

    To find a number in a matrix where all rows and columns are sorted non-decreasingly. Complexity of the solution.

    • Use binary search to find the number in each row and column

    • Start from the top-right corner or bottom-left corner to optimize search

    • Time complexity: O(m log n) or O(n log m) depending on the starting corner

  • Answered by AI

Interview Preparation Tips

Skills: Algorithm, Data structure
College Name: Na

Skills evaluated in this interview

Interview Questionnaire 

3 Questions

  • Q1. Write a program for snake traversal of binary tree
  • Ans. 

    Program for snake traversal of binary tree

    • Use a stack to keep track of nodes to be visited

    • Start with the root node and push it onto the stack

    • While the stack is not empty, pop a node and print its value

    • If the level is even, push the left child first and then the right child onto the stack

    • If the level is odd, push the right child first and then the left child onto the stack

  • Answered by AI
  • Q2. To write code to check linked list is palindrome or not, in a single traversal and without using any other data structure
  • Q3. Asked about OOPS concepts like abstraction, encapsulation, inheritance and polymorphism in detail and how they are implemented while programming

Interview Preparation Tips

Round: Test
Experience: It was on online objective test consisting of 4 sections: Aptitude, Technical MCQs, Code snippet based MCQs and Coding part.
Coding part had questions like balanced parenthesis check, etc.


Round: Technical Interview
Experience: Technical and managerial. Gave me a situation where I am in testing team and I found that customer requirement was drop down list at a place but developer has used bullet selection, and is not ready to change it. How will you manage? I gave some good replies and he was convinced.
Then he asked 25 horses puzzle (-----.php/puzzles/25-horses-3-fastest-5-races-puzzle/). I solved it.
He then asked me to code it. I wrote an algorithm first and then the code. He was very impressed.
He asked about virtual functions, abstract classes, pure virtual functions.


Round: Technical Interview
Experience: He asked to optimize the code I wrote in coding round.
Then he asked me candle puzzle on how to measure 30 min and 45 min.
Then he asked me the chocolate puzzle (-----.html).
What is paging and segmentation?
What are ACID properties in DBMS?
What is transaction and how is concurrency control done?
What is the difference between string builder and string buffer?
What is string pool in java?
What is JVM, JRE, JDK?
Differentiate between mutex and semaphore?
Can you override private and static members?
Contiguous and non-contiguous memory allocation?
What are Smart pointers?


Skills:
College Name: NIT Jalandhar

Skills evaluated in this interview

I applied via Campus Placement and was interviewed before Jun 2021. There were 2 interview rounds.

Round 1 - Group Discussion 

Current affairs - relevant things going on in the world especially financial/Fintech domain

Round 2 - Technical 

(2 Questions)

  • Q1. Guesstimation questions- bursh up on them CV centric questions
  • Q2. Agile Data analysis Situation based

Interview Preparation Tips

Interview preparation tips for other job seekers - Ask clarity on job role- be sure it aligns to what you want

Interview Questionnaire 

2 Questions

  • Q1. What is oops
  • Q2. Real world thing
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Selected Selected

I appeared for an interview before Feb 2022.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Technical 

(1 Question)

  • Q1. Linked list (detect loop, reverse, delte a node) tree (height, DFS) graph theory concept C++ basic questions
Round 3 - One-on-one 

(1 Question)

  • Q1. Total 3 round of Technical interviews.

Interview Preparation Tips

Interview preparation tips for other job seekers - C++ basics, Algo and Data structure and some basic concept of graph theory.
Are these interview questions helpful?

Interview Questionnaire 

3 Questions

  • Q1. Proficiency with excel and excel macros ??
  • Ans. 

    Yes, I am proficient in Excel and Excel macros.

    • I have extensive experience in using Excel for data analysis and manipulation.

    • I am skilled in creating and modifying Excel macros to automate repetitive tasks.

    • I am familiar with advanced Excel functions such as VLOOKUP, PivotTables, and conditional formatting.

    • I have used Excel to create charts and graphs to visualize data.

    • I am comfortable working with large datasets in Exc...

  • Answered by AI
  • Q2. What projects had done ??
  • Q3. Previous work details

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Referral and was interviewed before Jun 2022. There were 2 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Technical 

(3 Questions)

  • Q1. Linux commands,
  • Q2. Cloud technologies different services (iaas, paas, saas)
  • Ans. 

    Cloud technologies offer different services like IaaS, PaaS, and SaaS for varying levels of control and management.

    • IaaS (Infrastructure as a Service) provides virtualized computing resources over the internet, such as virtual servers and storage.

    • PaaS (Platform as a Service) offers a platform allowing customers to develop, run, and manage applications without dealing with infrastructure.

    • SaaS (Software as a Service) deli...

  • Answered by AI
  • Q3. What do you know AWS

Interview Preparation Tips

Interview preparation tips for other job seekers - Brush up OS basics and cloud technologies.

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Selected Selected

I appeared for an interview in Mar 2023.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Technical 

(2 Questions)

  • Q1. Resume based question like what did you do in this project? What was your role and responsibilities? Question related to jenkins like explain jenkins pipeline foow of ur previous project ? How did you impr...
  • Q2. Do you like wfh or wfo? What are benefits of working from wfo ?
Round 3 - HR 

(1 Question)

  • Q1. Grneral HR questions were asked Why do you want to join is? What are your strengths?

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