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I applied via LinkedIn and was interviewed in Nov 2024. There were 2 interview rounds.
Testing an payment flow on the application
I was interviewed in Dec 2021.
Round duration - 60 Minutes
Round difficulty - Medium
Time - afternoon.
Interviewer jumped straight into interview, formal and comfortable environment.
1. Interviewer introduction
2. Interviewee introduction
3. Coding question 1 - difficulty medium, topic - arrays
- explain approach, write code (pseudo code is fine), dry run on given TCS.
4. Coding question 2 - same as above, only question was different. Slightly more difficult but on arrays only.
5. Questions on Python & Django - difficulty medium - write code related to queryset on django objects
6. SQL question to code - 10th highest salary.
You are given a string S
. The task is to reverse the letters of the string while keeping non-alphabet characters in their original position.
S = "...
Reverse the letters of a string while keeping non-alphabet characters in their original position.
Iterate through the string and store the non-alphabet characters in their original positions
Reverse the letters of the string using two pointers technique
Combine the reversed letters with the non-alphabet characters to get the final reversed string
Given an array arr
that contains an equal number of positive and negative elements, rearrange the given array such that positive and negative numbers are arranged a...
Rearrange an array with equal positive and negative numbers alternatively while maintaining relative order.
Iterate through the array and separate positive and negative numbers into two separate arrays.
Merge the two arrays alternatively into the original array.
Ensure the relative order of positive and negative numbers is maintained.
Round duration - 60 Minutes
Round difficulty - Medium
1. Intro of interviewer
2. Intro of interviewee
3. Questions on Python - decorators, static method, class methods
4. Principal of coding, best practices
5. Question on DB - What is indexing, how to improve, best use of indexing.
6. Questions on django - what is django ORM, What is sandbox, Django models, Django queries.
7. Previous job, what do you do, stack you work on.
Very friendly environment, very pleasing person, loved it.
Tip 1 : Good at coding (solving, explaining), especially Dynamic Programming questions like knapsack. Focus 70% time on coding
Tip 2 : Apply to jobs through referral not on company site. Very important.
Tip 3 : Prepare good projects with how to explain in interview.
Tip 4 : Sound very energetic, competitive and some one with eager to learn, so they select you thinking you can be taught things as you have good attitude.
Remember : Good attitude in good coder > Bad attitude in expert coder.
Tip 1 : Max three, projects, which are interesting to talk about, and you have won something for it.
Tip 2 : Leave lot of white space, keep content small and in one page
I was interviewed in Jun 2021.
Round duration - 90 minutes
Round difficulty - Medium
Contained mix of coding, oops and general programming questions
Coding was live coding round
It was around 12pm
They used their own coding environment, I coded in java
Given an array arr
of length N
consisting of integers, find the sum of the subarray (including empty subarray) with the maximum sum among all subarrays.
Find the sum of the subarray with the maximum sum among all subarrays in an array of integers.
Iterate through the array and keep track of the maximum sum subarray seen so far.
Use Kadane's algorithm to efficiently find the maximum subarray sum.
Consider the case where all elements in the array are negative.
Handle the case where the array contains only one element.
Round duration - 90 Minutes
Round difficulty - Hard
It was a collection of HLD AND LLD
Was around 12pm
This was conducted on bluejeans
Design a URL shortener with database and necessary components
Use a unique identifier for each URL to generate short links
Store the original URL and corresponding short link in a database
Implement a redirect mechanism to redirect short links to original URLs
Consider implementing analytics to track usage and performance
Ensure scalability and reliability of the system
Round duration - 60 Minutes
Round difficulty - Easy
It was a friendly managerial round with director of my team, he was very for me to come on board and explained truthfully how payu is.
Round duration - 30 Minutes
Round difficulty - Easy
Just a normal HR discussion, he informed me that I've been selected and we discussed about the salary part
Tip 1 : have strong grasp of graph based algorithms
Tip 2 : have strong knowledge of data structure
Tip 3 : should be able to find where to use appropriate design pattern
Tip 1 : keep it short and simple
Tip 2 : focus more on design/architecture of project
PayU Payments interview questions for designations
I applied via Referral and was interviewed in Feb 2021. There were 4 interview rounds.
Top trending discussions
Autocomplete in IDEs helps developers write code faster by suggesting code snippets and completing code as they type.
Autocomplete should suggest code snippets based on the context of the code being written
Autocomplete should prioritize suggestions based on frequency of use
Autocomplete should also suggest variable and function names
Autocomplete should be customizable to allow for user-defined snippets and suggestions
Exa...
My weakness is public speaking.
I tend to get nervous when speaking in front of large groups.
I am working on improving my public speaking skills by practicing and seeking feedback.
I have taken courses and attended workshops to help me overcome my fear of public speaking.
Comparing 2 basketball game scenarios with different number of trials and baskets required to win
Calculate the probability of winning in each game scenario using binomial distribution formula
Compare the probabilities to determine which game scenario is preferable
In game1, the probability of winning is p. In game2, the probability of winning is the sum of probabilities of making 2 or 3 baskets
If p is high, game1 is pref...
I applied via Campus Placement and was interviewed in Dec 2016. There were 5 interview rounds.
Implement Binary Search Tree using given array of strings.
Sort the array in ascending order
Find the middle element and make it the root of the tree
Recursively create left and right subtrees using the left and right halves of the array
Repeat until all elements are added to the tree
Print the given Binary search tree in ascending order
Traverse the left subtree recursively
Print the root node
Traverse the right subtree recursively
Find buy and sell points for maximum profit in an array of stock prices in O(n)
Iterate through the array and keep track of the minimum price seen so far
Calculate the profit at each index by subtracting the minimum price from the current price
Update the maximum profit and buy/sell points accordingly
Return the buy and sell points for maximum profit
Chennai faces problems related to water scarcity, traffic congestion, and pollution.
Water scarcity due to inadequate rainfall and poor management of water resources.
Traffic congestion due to the increasing number of vehicles and poor road infrastructure.
Pollution caused by industries, vehicular emissions, and improper waste disposal.
Need more context on the question to provide an answer.
Please provide more information on the problem to be solved.
Without context, it is difficult to provide a solution.
Can you please provide more details on the problem statement?
Visa is a global payments technology company that connects consumers, businesses, banks and governments in more than 200 countries and territories.
Visa operates the world's largest retail electronic payments network.
VisaNet, the company's global processing system, handles more than 65,000 transaction messages a second.
Visa is constantly innovating to improve payment security and convenience, with initiatives such as Vi...
I was interviewed before Apr 2021.
Round duration - 45 minutes
Round difficulty - Easy
This was a technical interview round.
AJAX allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes.
AJAX stands for Asynchronous JavaScript and XML.
It allows web pages to update content without reloading the entire page.
AJAX uses XMLHttpRequest object to send and receive data from a server.
Commonly used in web applications to provide a more responsive user experience.
SOAP is a protocol, while REST is an architectural style for web services.
SOAP is a protocol that uses XML for message format and relies on a request-response model.
REST is an architectural style that uses standard HTTP methods like GET, POST, PUT, DELETE.
SOAP is more rigid and requires more bandwidth, while REST is lightweight and flexible.
SOAP has built-in security features like WS-Security, while REST relies on exte...
GET is used to request data from a server, while POST is used to submit data to a server.
GET requests data from a specified resource, while POST submits data to be processed to a specified resource.
GET requests are cached by browsers, while POST requests are not.
GET requests can be bookmarked and shared, while POST requests cannot.
GET requests have length restrictions, while POST requests do not.
Example: Using GET to r...
The Observer Pattern is a behavioral design pattern where an object (subject) maintains a list of dependents (observers) that are notified of any state changes.
Allows for one-to-many dependency between objects
When the subject's state changes, all observers are automatically notified and updated
Commonly used in event handling systems and GUI frameworks
Round duration - 40 minutes
Round difficulty - Easy
This was the second technical interview round.
A singleton class is a class that can only have one instance created throughout the entire application.
Singleton classes have a private constructor to prevent multiple instances from being created.
They typically provide a static method to access the single instance.
Commonly used for logging, database connections, and configuration settings.
Immutability in Java refers to the property of objects whose state cannot be changed once they are created.
Immutability ensures that once an object is created, its state cannot be modified.
Immutable objects are thread-safe and can be shared without the risk of data corruption.
String class in Java is an example of an immutable class.
To create an immutable class, make the class final, all fields private, and provide only
Dependency injection is a design pattern where components are given their dependencies rather than creating them internally.
Allows for easier testing by providing mock dependencies
Promotes loose coupling between components
Improves code reusability and maintainability
Examples: Constructor injection, Setter injection, Interface injection
To create an immutable class in Java, make the class final, make all fields private and final, provide only getter methods, and do not provide any setter methods.
Make the class final to prevent inheritance.
Make all fields private and final to prevent modification.
Provide only getter methods to access the fields.
Do not provide any setter methods to modify the fields.
Round duration - 30 minutes
Round difficulty - Easy
HR round with typical behavioral problems.
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.
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.
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Interview experience
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