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Angel One Developer Interview Questions and Answers

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I appeared for an interview before Sep 2020.

Round 1 - Coding Test 

(3 Questions)

Round duration - 70 minutes
Round difficulty - Easy

The first round was the Online Coding Round of 70 minutes with 3 problems of 3 marks, 3 marks, and 4 marks respectively.
The first two questions were easy and the third one was a bit tricky. The round started at 6 PM. 
Anyone who is practicing continuously could have solved these questions easily within the time limit. The test cases were also not so hard and distinct. I coded in C++ language.
The questions asked were-
1. Minimum insertions required to make a string palindrome
2. To find the distance of the closest leaf from a node with given data.
3. Add two numbers represented by linked lists

22 students were selected for the next round.

  • Q1. 

    Minimum Insertions to Make a String Palindrome

    Determine the minimal number of characters needed to insert into a given string STR to transform it into a palindrome.

    Example:

    Input:
    STR = "abcaa"
    Outp...
  • Ans. 

    The task is to find the minimum number of characters needed to insert into a given string to make it a palindrome.

    • Use dynamic programming to find the longest palindromic subsequence of the given string.

    • Subtract the length of the longest palindromic subsequence from the length of the original string to get the minimum insertions required.

    • Handle edge cases like an empty string or a string that is already a palindrome.

    • Exa...

  • Answered by AI
  • Q2. 

    Closest Leaf in a Binary Tree

    Ninja is stuck in a maze represented as a binary tree, and he is at a specific node ‘X’. Help Ninja find the shortest path to the nearest leaf node, which is considered an ex...

  • Ans. 

    Find the minimum distance from a given node to the nearest leaf node in a binary tree.

    • Traverse the binary tree from the given node 'X' to find the nearest leaf node using BFS or DFS.

    • Keep track of the distance from 'X' to each leaf node encountered during traversal.

    • Return the minimum distance found as the output.

  • Answered by AI
  • Q3. 

    Adding Two Linked Lists

    Given two singly linked lists, with each list representing a positive number without leading zeros, your task is to add these two numbers and return the result in the form of a new...

  • Ans. 

    Add two numbers represented by linked lists and return the result as a new linked list.

    • Traverse both linked lists simultaneously while adding corresponding elements and carry over the sum if needed

    • Handle cases where one linked list is longer than the other

    • Create a new linked list to store the sum of the two numbers

  • Answered by AI
Round 2 - Video Call 

(3 Questions)

Round duration - 80 minutes
Round difficulty - Easy

It was a technical interview. The platform used was google meet for online video calling. The interviewer first introduced himself then asked me to introduce myself. He also asked about my well-being amid the Covid-19 pandemic. He asked me 3 problems from data structures. He put a lot of focus on my project. We discussed about my project for about 20 mins. He asked various questions related to my project and I answered them confidently. After 70-75 mins he said that interview was over and that I may ask him anything. I asked him to give me feedback about my resume and my project. He gave me advice to improve my resume and the interview was over. The first technical interview was easy and was not so challenging as I was prepared.

  • Q1. 

    All Pairs with Target Sum

    Given an array of integers ARR with length 'N' and an integer 'Target', the task is to find all unique pairs of elements that add up to the 'Target'.

    Input:

    First line: Integer...
  • Ans. 

    Find all unique pairs of elements in an array that add up to a given target sum.

    • Use a hashmap to store the difference between the target sum and each element as keys and their indices as values.

    • Iterate through the array and check if the current element's complement exists in the hashmap.

    • Return the pairs of elements that add up to the target sum.

  • Answered by AI
  • Q2. 

    Quick Sort Problem Statement

    Sort the given array of integers in ascending order using the quick sort algorithm. Quick sort is a divide-and-conquer algorithm where a pivot point is chosen to partition the...

  • Ans. 

    Implement quick sort algorithm to sort an array of integers in ascending order.

    • Choose a pivot element (e.g., rightmost element) to partition the array into two subarrays.

    • Recursively apply quick sort on the subarrays until the entire array is sorted.

    • Time complexity can be optimized to NlogN for worst-case scenarios.

  • Answered by AI
  • Q3. 

    Merge Sort Task

    Given a sequence of numbers, denoted as ARR, your task is to return a sorted sequence of ARR in non-descending order using the Merge Sort algorithm.

    Example:

    Explanation:
    The Merge Sort...
  • Ans. 

    Implement Merge Sort algorithm to sort a sequence of numbers in non-descending order.

    • Implement the Merge Sort algorithm which involves dividing the array into two halves, sorting each half, and then merging them back together.

    • Recursively call the Merge Sort function on each half of the array until the base case of having a single element in the array is reached.

    • Merge the sorted halves back together in a new array in no...

  • Answered by AI
Round 3 - Video Call 

(2 Questions)

Round duration - 60 minutes
Round difficulty - Medium

This was also a technical round. The interviewer focused on data structures and resume. Apart from some basic questions about my resume, he asked majorly about data structures and algorithms. The interview was an hour long and he asked only 2 problems. Both of them were from trees. In this round, he focused if I can change my approach if a slight change is made in the question. Like he asked me to write code for inorder traversal. Obviously, I used a recursive approach. He then asked me to use the iterative method to find inorder traversal of the tree.

The questions he asked were-
1. Inorder traversal (both recursive and iterative method)
2. Level Order Traversal
( For obvious reasons I knew level order traversal very well. I coded it swiftly, so he asked me to write code for Zig-Zag traversal)

  • Q1. 

    Inorder Successor in a Binary Tree

    Find the inorder successor of a given node in a binary tree. The inorder successor is the node that appears immediately after the given node during an inorder traversal....

  • Ans. 

    Find the inorder successor of a given node in a binary tree.

    • Perform an inorder traversal of the binary tree to find the successor of the given node.

    • If the given node has a right child, the successor will be the leftmost node in the right subtree.

    • If the given node does not have a right child, backtrack to the parent nodes to find the successor.

  • Answered by AI
  • Q2. 

    Zigzag Traversal of Binary Tree

    Given a binary tree with integer values in its nodes, your task is to print the zigzag traversal of the tree.

    Note:

    In zigzag order, level 1 is printed from left to right...
  • Ans. 

    Implement a function to print the zigzag traversal of a binary tree.

    • Use a queue to perform level order traversal of the binary tree.

    • Maintain a flag to switch between printing nodes from left to right and right to left at each level.

    • Store nodes at each level in a list and reverse the list if the flag is set to print in zigzag order.

  • Answered by AI
Round 4 - Video Call 

Round duration - 50 minutes
Round difficulty - Medium

This was the final round of the Interview process. My interview was scheduled for 7.30 PM. It started at approximately 7.40 PM. The main focus of the interviewer was on my projects and my skills. He asked me many questions regarding my project like what problems I faced, what did you learn from this, apart from developing skills what else did you learn while developing the project, why did you use this tech instead of this, security features, scalability of the project and many more. I answered almost every question as perfectly as I can. Later he asked me some basic questions from NodeJS (as I am a full stack developer). In the end, he asked a puzzle. I didn't know the solution to the puzzle but we discussed it and I figured out the solution.

Interview Preparation Tips

Eligibility criteriaabove 7 CGPA, No active backlogsPaytm (One97 Communications Limited) interview preparation:Topics to prepare for the interview - Data Structures, OOPS, Dynamic Programming, Recursion, Advanced Data Structures, Operating System, Time complexity analysis and Sorting AlgorithmsTime required to prepare for the interview - 4 monthsInterview preparation tips for other job seekers

Tip 1 : Properly grasp Data Structures and Algorithms from basics.
Tip 2 : Learn about Time complexity 
Tip 3 : Be honest and walk through your thought process to the interviewer.
Tip 4 : Its always good to be presentable and have good communications skills

Application resume tips for other job seekers

Tip 1 : Never Lie on your resume. Only write what you have done and what you know.
Tip 2 : It's good to have one or two projects on your resume. Mention the tech stack you used and a brief description of the project. It will be best if you host/upload your project on the cloud.
Tip 3 : Avoid unnecessary details like Hobbies, family details, declaration, date, signature, etc.
Tip 4 : You're more than a 1-page resume. But your resume should not be more than a page

Final outcome of the interviewSelected

Skills evaluated in this interview

I appeared for an interview before Sep 2020.

Round 1 - Coding Test 

(1 Question)

Round duration - 90 mins
Round difficulty - Hard

There were questions related to DP and DFS.

 

  • Q1. 

    Trapping Rain Water Problem Statement

    You are given a long type array/list ARR of size N, representing an elevation map. The value ARR[i] denotes the elevation of the ith bar. Your task is to determine th...

  • Ans. 

    Calculate the total amount of rainwater that can be trapped between given elevations in an array.

    • Iterate through the array and calculate the maximum height on the left and right of each bar.

    • Calculate the amount of water that can be trapped at each bar by taking the minimum of the maximum heights on the left and right.

    • Sum up the trapped water at each bar to get the total trapped water for the entire array.

  • Answered by AI
Round 2 - Video Call 

(3 Questions)

Round duration - 60 mins
Round difficulty - Medium

At first, I was asked about the different projects that I have done so far. We had a detailed discussion on the same.
He also checked my OOP concepts

  • Q1. Can you describe the process of designing an LRU Cache from scratch during your System Design Round?
  • Ans. 

    Designing an LRU Cache involves implementing a data structure that stores a fixed number of items and removes the least recently used item when full.

    • Start by defining the data structure for the cache, typically using a combination of a hashmap and a doubly linked list.

    • Implement methods for getting and setting key-value pairs in the cache.

    • When a new item is added to the cache, check if it exceeds the maximum capacity. I...

  • Answered by AI
  • Q2. 

    Reverse Linked List Problem Statement

    Given a Singly Linked List of integers, your task is to reverse the Linked List by altering the links between the nodes.

    Input:

    The first line of input is an intege...
  • Ans. 

    Reverse a singly linked list by altering the links between nodes.

    • Iterate through the linked list and reverse the links between nodes

    • Use three pointers to keep track of the current, previous, and next nodes

    • Update the links between nodes to reverse the list

    • Return the head of the reversed linked list

  • Answered by AI
  • Q3. 

    Middle of a Linked List

    You are given the head node of a singly linked list. Your task is to return a pointer pointing to the middle of the linked list.

    If there is an odd number of elements, return the ...

  • Ans. 

    Return the middle element of a singly linked list, or the one farther from the head if there are even elements.

    • Traverse the linked list with two pointers, one moving twice as fast as the other

    • When the fast pointer reaches the end, the slow pointer will be at the middle

    • If there are even elements, return the one that is farther from the head node

    • Handle edge cases like linked list of size 1 or empty list

  • Answered by AI
Round 3 - Video Call 

Round duration - 60 mins
Round difficulty - Medium

It is HR + Technical round
asked about the Behavioural questions and how you justify yourself in an argument .questions related to current technology.
They gave me feedback on how well I had performed so far and gave me suggestions on what more can I do to further improve myself.

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 1 in BangaloreEligibility criteriaGood ProjectsRazorpay interview preparation:Topics to prepare for the interview - Projects, Development, NoSQL, Data Structure, OOPS, DBMS, Algorithm.Time required to prepare for the interview - 4 monthsInterview preparation tips for other job seekers

Tip 1 : Be thorough about your projects
Tip 2 : Prepare Ds and Algo and Practice all standard questions 
Tip 3 : Know the complexities of the code that you’ve written.

Application resume tips for other job seekers

Tip 1 : Mention at least 2 projects.
Tip 2 : Don't make any silly spelling mistakes on resume

Final outcome of the interviewSelected

Skills evaluated in this interview

Interview Preparation Tips

Round: Technical Interview
Experience: Finally, I got the offer from PayU. I was very Happy. Thanks AmbitionBox for helping me in my preparation

Skills: Algorithm, data structures
College Name: Na

Software Developer Interview Questions & Answers

Visa user image Pranav Bhat Thirthahalli

posted on 3 Dec 2015

Interview Questionnaire 

14 Questions

  • Q1. What is race condition and how can it be eliminated
  • Ans. 

    Race condition is a situation where multiple threads/processes access and manipulate shared data simultaneously.

    • It can be eliminated by using synchronization techniques like locks, semaphores, and mutexes.

    • Another way is to use atomic operations that ensure the data is accessed and modified atomically.

    • Using thread-safe data structures can also prevent race conditions.

    • Example: Two threads trying to increment a shared var...

  • Answered by AI
  • Q2. What is JCube?
  • Ans. 

    JCube is a Java library for creating and manipulating Rubik's Cube puzzles.

    • JCube provides classes for representing Rubik's Cube puzzles and algorithms for solving them.

    • It supports various cube sizes and can generate random scrambles.

    • JCube can be used in Java applications or as a standalone command-line tool.

    • It is open source and available on GitHub.

  • Answered by AI
  • Q3. What is regression testing?
  • Ans. 

    Regression testing is the process of testing changes made to a software application to ensure that existing functionality still works.

    • It is performed after making changes to the software

    • It ensures that existing functionality is not affected by the changes

    • It helps to catch any defects or bugs that may have been introduced

    • It can be automated using testing tools

    • Examples include retesting after bug fixes, testing after new

  • Answered by AI
  • Q4. Discussion on different sorting techniques
  • Q5. Discussion on SQL and SQL optimisaion
  • Q6. Software engineering principles
  • Ans. 

    Software engineering principles are the best practices and guidelines for developing high-quality software.

    • Software should be designed with modularity and scalability in mind.

    • Code should be well-documented and easy to read.

    • Testing and debugging should be an integral part of the development process.

    • Version control should be used to manage code changes.

    • Security and privacy should be considered throughout the development

  • Answered by AI
  • Q7. Java and OOP's question
  • Q8. Define Singleton class
  • Ans. 

    A Singleton class is a class that can only have one instance at a time.

    • It restricts the instantiation of a class to a single object.

    • It provides a global point of access to that instance.

    • It is often used in situations where a single object is required to coordinate actions across a system.

    • Example: Database connection manager, Configuration manager, Logger manager.

  • Answered by AI
  • Q9. Explain Testing principles and Design principles
  • Ans. 

    Testing principles ensure software quality, while design principles guide software development.

    • Testing principles include unit testing, integration testing, and acceptance testing.

    • Design principles include SOLID, DRY, and KISS.

    • Testing principles ensure that software meets requirements and is free of defects.

    • Design principles guide software development to be modular, maintainable, and scalable.

  • Answered by AI
  • Q10. Types of machine learning and methods and examples, they may give you a situation and ask you which technique is good and why
  • Q11. Why choose you for VISA?
  • Ans. 

    I have the necessary skills, experience, and passion to contribute to VISA's success.

    • I have a strong background in software development and have worked on projects similar to those at VISA.

    • I am a quick learner and can adapt to new technologies and programming languages easily.

    • I am passionate about creating high-quality software that meets the needs of users and exceeds their expectations.

    • I am a team player and can work...

  • Answered by AI
  • Q12. Which profile is good for you?
  • Ans. 

    A profile that challenges me to learn and grow while allowing me to contribute to a team.

    • A position that encourages continuous learning and development

    • A role that allows me to collaborate with a team and contribute to projects

    • A company culture that aligns with my values and work ethic

  • Answered by AI
  • Q13. About the work culture at VISA Inc
  • Q14. If u already have a placement, why this company
  • Ans. 

    I am interested in exploring new opportunities and challenges that this company can offer.

    • I am impressed with the company's reputation and growth potential.

    • I am excited about the projects and technologies this company is working on.

    • I believe this company can provide me with a better work-life balance and career growth opportunities.

    • I am looking for a company culture that aligns with my values and goals.

    • I am open to exp...

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience: Online Test on mettl.com
- 2 coding questions ( 15*2 = 30 marks ) - Moderate level
- 10 MCQs on Programming and Java ( 1*10 = 10)
- 6 MCQs on Machine Learning and Hadoop ( 1*6 = 6 )
- 6 MCQs on Computer Networks ( 1*6 = 6 )
- 6 MCQs on Computer Infrastructure and Architecture ( 1*6 = 6)
- 6 MCQs on Application security and Cryptography ( 1*6 = 6)
15 shortlisted from here including 8 B.Techs and 7 M.Techs for F2F interviews, which were taken by VISA employees from their US and Singapore offices( since they don't have any office at India ).

Round: Technical Interview
Experience: They may give you a situation and ask you to explain which Software engineering principles will you use. They ask you how will you explain the concept of stacks and queues to a 7 year old, or to a granny, so as to encourage programming(like seriously ? )

General Tips: Nothing as such, since this was my second on-campus placement, I had good experience of interviews.
Keep your fundamentals in all computer science subjects open. Unlike other companies they don't focus much on coding alone. The only other company which also looks at perfection in all computer science aspects is Xerox Research Center India.
Challenging and Equally rewarding, but seriously a unique experience with no much tension
Skills:
College Name: NIT Surathkal

Skills evaluated in this interview

Interview Questionnaire 

1 Question

  • Q1. Tell me about your project ( written in language)?
  • Ans. 

    Developed a web application using Python and Django framework for managing inventory and sales.

    • Used Python programming language for backend development

    • Implemented Django framework for building web application

    • Designed database schema for inventory and sales data

    • Integrated frontend using HTML, CSS, and JavaScript

    • Implemented user authentication and authorization features

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience: They asked 3 question on data structures .
1.Merging linekd list
2 and 3 BST related
Duration: 1 hour
Total Questions: 3

Round: Technical Interview
Experience: Interviewer asked me to explain projects which I had mentioned in Resume. Then He asked me to implement a problem on basis of my project.
It was telephonic round.
CGPA and my project mattered.

College Name: IIT Roorkee

I applied via Campus Placement and was interviewed in Sep 2016. There were 4 interview rounds.

Interview Questionnaire 

7 Questions

  • Q1. Tell me about yourself
  • Ans. 

    I am a passionate software developer with experience in Java, Python, and web development.

    • Experienced in Java, Python, and web development technologies

    • Strong problem-solving skills

    • Team player with excellent communication skills

  • Answered by AI
  • Q2. Explain your resume
  • Ans. 

    My resume highlights my experience in software development and showcases my skills in various programming languages and technologies.

    • Worked on multiple projects using Java, Python, and C++

    • Developed web applications using HTML, CSS, and JavaScript

    • Experience with databases such as MySQL and MongoDB

    • Familiarity with Agile methodology and version control systems like Git

    • Participated in hackathons and coding competitions

  • Answered by AI
  • Q3. Questions on projects mentioned
  • Q4. Why do you want to go for VISA?
  • Ans. 

    I want to go for VISA to explore new opportunities and gain international experience.

    • To gain exposure to different cultures and work environments

    • To expand my skill set and learn new technologies

    • To work on challenging projects and contribute to the growth of the company

    • To build a global network of professionals and enhance my career prospects

  • Answered by AI
  • Q5. Code a basic binary tree
  • Ans. 

    A binary tree is a data structure in which each node has at most two children.

    • Start with a root node

    • Each node has a left and right child

    • Nodes can be added or removed

    • Traversal can be done in-order, pre-order, or post-order

  • Answered by AI
  • Q6. Code a basic linked list
  • Ans. 

    Code a basic linked list

    • Create a Node class with data and next pointer

    • Create a LinkedList class with head pointer

    • Implement methods to add, delete, and search nodes in the linked list

  • Answered by AI
  • Q7. Code a circular linked list
  • Ans. 

    A circular linked list is a data structure where the last node points back to the first node, forming a loop.

    • Create a Node class with data and next pointer

    • Initialize the head node and set its next pointer to itself

    • To add a node, create a new node and set its next pointer to the head node's next pointer, then update the head node's next pointer to the new node

    • To traverse the circular linked list, start from the head nod...

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience: It was a programming test hosted on hackerrank. A total of 3 questions. I could solve only one of them. That too only a few test cases. Still got shortlisted for the next round. :)
Tips: Do practice a few challenges on programming platforms. Brush up your programming knowledge.
Total Questions: 3

Round: Technical Interview
Experience: It was an HR cum Technical round for me as I came from a non CS background. I was able to convince them I am a perfect fit for VISA
Tips: Do prepare your resume well. If you have coding projects, make sure you are clear with whatever you write. They might quiz you hard on them. Strong knowledge on Data structures and Algorithms will give you an edge.

Skills: Presentation Of Facts In Resume, Basic Coding, Communication, Algorithms And Data Structures
Duration: 2
College Name: IIT Madras
Funny Moments: I am a part of the sponsorship team of our technical and VISA was an associate sponsor for the same the previous year. Hence I had specified this fact in my interview. :P

Skills evaluated in this interview

Interview Questionnaire 

21 Questions

  • Q1. Discussion of previous written test questions
  • Q2. Find the odd repeating element from a set of repeating elements
  • Ans. 

    Find the odd repeating element from an array of strings

    • Use a hash table to count the frequency of each element

    • Iterate through the hash table to find the element with an odd count

  • Answered by AI
  • Q3. A 2D matrix is given which is row wise and column wise sorted. Find a particular element from it
  • Ans. 

    Finding an element in a sorted 2D matrix

    • Start from the top right corner or bottom left corner

    • Compare the target element with the current element

    • Move left or down if the target is smaller, else move right or up

    • Repeat until the target is found or all elements are checked

  • Answered by AI
  • Q4. SQL Query to find Nth highest salary from table
  • Ans. 

    SQL query to find Nth highest salary from table

    • Use ORDER BY and LIMIT clauses

    • Use subquery to get the Nth highest salary

    • Handle cases where there are less than N distinct salaries

  • Answered by AI
  • Q5. Another basic SQL query
  • Q6. Write a function that returns '3' when '4' is passed as an input and vice versa without using if-else condition
  • Ans. 

    Function to swap '3' and '4' without using if-else

    • Use XOR operator to swap the values

    • Convert the input to ASCII code and perform the swap

    • Use a lookup table to map the values

  • Answered by AI
  • Q7. Question on Suffix trees
  • Q8. Question on Tries
  • Q9. Question on Ternary search trees
  • Q10. Question on hash maps
  • Q11. Question on complexity of an algorithm
  • Q12. 3-4 SQL queries
  • Q13. Question on SQL joins
  • Q14. JAVA questions on static block,static function and static variables
  • Q15. JAVA questions on memory initialization and references
  • Q16. Puzzle on measuring exactly half a glass of water
  • Q17. 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 like MySQL and MongoDB

  • Answered by AI
  • Q18. Why PAYTM?
  • Ans. 

    PAYTM is a leading digital payment platform in India with a wide range of services.

    • PAYTM has a user-friendly interface and offers a seamless payment experience.

    • It provides a variety of services like mobile recharges, bill payments, and online shopping.

    • PAYTM has a strong focus on security and fraud prevention measures.

    • It has a large user base and is widely accepted by merchants across India.

    • PAYTM is constantly innovatin...

  • Answered by AI
  • Q19. Will you go for further studies?
  • Ans. 

    Yes, I am open to pursuing further studies in the future.

    • I believe in continuous learning and staying updated with the latest technologies.

    • Further studies can help me specialize in a particular field and enhance my skills.

    • I may consider pursuing a master's degree in computer science or a related field.

    • However, my immediate focus is on gaining practical experience and contributing to the organization.

  • Answered by AI
  • Q20. Why do you think has PAYTM grown so fast?
  • Ans. 

    PAYTM grew fast due to its innovative approach and early adoption of digital payments.

    • Early adoption of digital payments in India

    • Innovative approach with features like mobile recharges, bill payments, and cashback offers

    • Expansion into e-commerce and financial services

    • Strategic partnerships with major companies like Uber and Alibaba

  • Answered by AI
  • Q21. (looking at my CGPA of 9) You can get a better company. Then Why PAYTM only?

Interview Preparation Tips

Round: Test
Experience: there were 20 mcqs and 2 coding questions. It was a pen and paper test. We were given 1 hour to solve it. The mcqs were of average difficulty. The 2 coding questions were:
1. A variation of the standard Josephus Problem
2. Find the 'x' largest elements from 'n' input elements without using sorting.
Tips: They focus on algorithms not on complete solutions. Do not leave any question unattempted. If you do not know the exact approach then use Brute-Force approach.

Round: Technical Interview
Experience: The Interviewer was very nice. He was focussing on the approach used not on codes.
Tips: Be calm and think by basics :)

Round: Technical Interview
Experience: The interviewer asked high level data structures in this round. But again he saw the approach used and not exact solution
Tips: Don't give up. Tell whatever you know

Round: Technical Interview
Experience: JAVA questions were based on very detailed concepts. Study OOP properly.
Tips: Maintain your calm :)

Round: HR Interview
Experience: Overall the experience was nice and smooth.
Tips: If they allow you to ask them any question then ask them something about the company. They should find you interested in the company :)

General Tips: Just be cool. Show them you are enthusiastic to learn and work. While prepration focus on Basics and Algorithms. Prepare DBMS nicely too :)
Skill Tips: Have full knowledge about your projects
Skills: JAVA, Data Structures, Operating systems, Network Programming, DBMS
College Name: NIT Jalandhar
Motivation: PAYTM is a perfect mix for the dynamic startup culture and stability of a big organiztaion. PAYTM has an amazing work culture and excellent opportunities for growth

Skills evaluated in this interview

Interview Preparation Tips

Round: Test
Experience: There were 3 Questions . One on String manipulation and two were on Binary Trees. All were easy but there was time constraint.
Tips: Practice as many question as possible.
Duration: 60 minutes
Total Questions: 3

Round: Technical Interview
Experience: I was given the problem to design a car pooling system complete with the required classes .. data structures which would be used ... how the database would look like etc..
Tips: General understanding of databases and OOP concepts would do.

Round: Technical Interview
Tips: Be thorough and have in-depth knowledge of each and every point of your resume.

College Name: BITS Pilani

Interview Preparation Tips

Skills: Algorithm, Java, Data structure
College Name: na

I appeared for an interview in Dec 2017.

Interview Questionnaire 

3 Questions

  • Q1. You need to find the maximum water pond formed in bw the building
  • Ans. 

    To find the maximum water pond formed between buildings.

    • Identify the lowest point between the buildings.

    • Calculate the area of the pond using the distance between the buildings and the depth of the pond.

    • Consider any obstacles or uneven ground that may affect the pond's shape.

    • Use a surveying tool or satellite imagery to get accurate measurements.

    • Take into account any drainage systems or natural water flow that may affect

  • Answered by AI
  • Q2. On mars you have to place n robots and they are connected via GPS. now you need to move each robot such that the whole mars is visited and each robot visit the minimum area(meaning no overlapping of area)...
  • Q3. Design dictionary using trie....having operations of inserting a word, updating and deleting (needed to write full running code)
  • Ans. 

    Design a dictionary using trie with insert, update and delete operations.

    • Implement a Trie data structure with nodes containing a character and a boolean flag to indicate end of word

    • For insert operation, traverse the trie and add nodes for each character in the word

    • For update operation, delete the existing word and insert the updated word

    • For delete operation, mark the end of word flag as false and delete the node if it ...

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience: Simple questions
Duration: 1 hour 10 minutes
Total Questions: 3

College Name: IIT Guwahati

Skills evaluated in this interview

Angel One Interview FAQs

How to prepare for Angel One Developer interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Angel One. The most common topics and skills that interviewers at Angel One expect are Backend, Coding, Data Structures, Distribution System and E - learning.

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