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I applied via Campus Placement
One medium and one standard DP question
Design Google Pay - a digital wallet platform for online payments and transactions.
Allow users to securely store payment information such as credit/debit cards, bank accounts, and loyalty cards.
Enable users to make payments in stores, online, and within apps using their stored payment methods.
Implement security features like biometric authentication, tokenization, and encryption to protect user data.
Provide features fo...
High Level Design (HLD) of recursive functions in software development.
Recursive functions call themselves to solve smaller instances of the same problem.
HLD of recursive functions involves defining the base case, recursive case, and termination condition.
Example: HLD of a recursive function to calculate factorial of a number involves defining base case as factorial(0) = 1.
I applied via Campus Placement and was interviewed in Feb 2024. There was 1 interview round.
2d grid , 4 questions easy to medium
I applied via Company Website and was interviewed in Jan 2024. There were 3 interview rounds.
SQL core Java Angular React Spring Boot
SQL Core Java Angular React Spring Boot
I applied via Company Website and was interviewed in Apr 2024. There was 1 interview round.
The questions were medium-difficult level
Visa interview questions for designations
I applied via Campus Placement and was interviewed before Jul 2022. There were 3 interview rounds.
It had 4 questions of moderate difficulty
Get interview-ready with Top Visa Interview Questions
I was interviewed in Dec 2020.
Round duration - 60 minutes
Round difficulty - Easy
The coding test was conducted on Hackerrank platform. The test was in the evening. There were two coding questions of easy difficulty. The test was proctored, our webcam was on but not the mic. Also we were not allowed to switch tabs.
About 360 students sat in this round out which 15 were shortlisted for the next interview round.
You are provided with an array/list of integers named 'ARR' of size 'N' and an integer 'K'. Your task is to determine the maximum number of elements that can be m...
Determine the maximum number of elements that can be made equal by performing at most K operations on an array of integers.
Sort the array in non-decreasing order to easily identify the elements that need to be increased
Calculate the difference between adjacent elements to determine the number of operations needed to make them equal
Keep track of the total number of operations used and the maximum number of elements that
Given an integer array/list arr
and an integer 'Sum', determine the total number of unique pairs in the array whose elements sum up to the given 'Sum'.
The first line c...
Count the total number of unique pairs in an array whose elements sum up to a given value.
Use a hashmap to store the frequency of each element in the array.
Iterate through the array and for each element, check if (Sum - current element) exists in the hashmap.
Increment the count of pairs if the complement exists in the hashmap.
Tip 1 : Prepare data structures and algorithms thoroughly and practice atleast 2 to 3 questions daily for 4-5 months consistently.
Tip 2 : Have few good projects in your resume and also prepare your core subjects like Operating System, DBMS.
Tip 3 : Before interview do a little research about the company.
Tip 1 : Mention at least 2 good projects.
Tip 2 : You should be able to defend whatever you have put on your resume so don't mention anything false.
I was interviewed in Nov 2020.
Round duration - 60 minutes
Round difficulty - Medium
This was an elimination round. There were 2 coding questions. Both questions were of medium level and I solved them in a given time. After this round, 29 students got shortlisted and I was one of them.
Ninja is organizing a dance competition and wants to pair participants using a unique method. Each participant chooses a number upon entry, and Ninja selects a nu...
Find the number of distinct pairs of participants with a given difference in chosen numbers.
Iterate through the array and for each element, check if the pair exists with the required difference 'K'.
Use a hash set to keep track of unique pairs to avoid counting duplicates.
Return the size of the hash set as the final count of distinct pairs.
Given an array of integers ‘A’ of length ‘N’, find the maximum length of a sub-array where the absolute difference between adjacent element...
Find the maximum length of a sub-array with adjacent differences of 0 or 1 in an array of integers.
Iterate through the array and keep track of the current sub-array length with adjacent differences of 0 or 1.
Update the maximum length encountered so far as you traverse the array.
Return the maximum length found as the result.
Round duration - 60 minutes
Round difficulty - Easy
This was a technical round on Zoom. The interviewer was very friendly. He gave me one coding problem. I solved the problem and then he asked to improve time and space complexity if possible. I explained my logic very well. After this question, he asked to me explain 3NF(3rd normal form). Then we had some discussion on OOPs concepts.
Design a data structure for a Least Recently Used (LRU) cache that supports the following operations:
1. get(key)
- Return the value of the key if it exists in the cache; otherw...
Design a Least Recently Used (LRU) cache data structure that supports get and put operations with capacity constraint.
Use a combination of hashmap and doubly linked list to implement the LRU cache.
Keep track of the least recently used item and evict it when the cache reaches its capacity.
Update the position of an item in the cache whenever it is accessed to maintain the order of recently used items.
Round duration - 60 minutes
Round difficulty - Medium
This was another technical round. The interviewer gave me a coding problem to solve.
You are provided with a string S
containing only three types of characters: (')
, )')
, and *
.
A Valid String is characterized by the following conditions:
1. ...
Check if a given string containing parentheses and asterisks is valid based on certain conditions.
Iterate through the string and keep track of the count of left parentheses, right parentheses, and asterisks.
Use a stack to keep track of the positions of left parentheses and asterisks.
If at any point the count of right parentheses exceeds the count of left parentheses and asterisks, the string is invalid.
Round duration - 60 minutes
Round difficulty - Easy
Tip 1 : Work on your problem-solving skills. Solve as many questions as you can.
Tip 2 : Communication skills are very important in interviews.
Tip 3 : Do some good projects.
Tip 1 : Mention some good projects on your resume and be prepared.
Tip 2 : Do not put false things on your resume.
I was interviewed in Dec 2020.
Round duration - 60 minutes
Round difficulty - Medium
test timing: 7-8 pm
2 programming questions
webcam proctored
You are provided with an array ARR
of integers of size 'N' and an integer 'K'. The goal is to move from the starting index to the end of the array with the minimum possib...
Find minimum cost to reach end of array by jumping with constraints
Use dynamic programming to keep track of minimum cost at each index
Iterate through the array and update the minimum cost based on reachable indices within K steps
Calculate cost to jump from current index to reachable indices and update minimum cost accordingly
Tip 1 : Ability to apply data structures in questions(practice graph and Tree questions)
Tip 2 : Thorough knowledge of the projects done
Tip 3 : Good knowledge about computer science concepts
Tip 1 : Mention projects that you have done yourself and are thorough with
Tip 2 : mention soft skills
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...
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.
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
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
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.
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.
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...
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
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...
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
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