Software Engineer at Visa

How it went

What they would tell you

How to prepare

Their background

Round by round

1. 1

   Online Assessment60 min

   The first filter was online test, had 4 DSA problems

   • Find all unique triplets in a 2D array that sum to a target value.
   • Given a string with parentheses, balance the parentheses by adding the minimum characters.
   • Given a binary matrix, implement flood-fill from a starting cell, changing all connected 1s to 0s.
   • Given an array of integers and a set of queries (add, remove, update), count and report the number of unique values in the array after each query. I completed all questions within the time limit
2. 2

   Technical Interview 160 min

   Starts with easy DSA, moves to SQL, then projects and ends with core CS theory

   • Find the majority element in array

   • Rotate an array to the right by k steps Given a table of product reviews, count the average rating for each product category What is a self-referential tables? Explain with example I explained my project in detail, covering my role and contributions Core CS

   • Explain C++ virtual functions and how they enable polymorphism

   • What is the difference between threads and processes?

   • How does a CPU cache work?

   • Describe the JavaScript event loop

   • Majority Element-I
   • Left Rotate Array by K Places
3. 3

   Technical Interview 260 min

   Asked BSF/DFS related problem, Given a map of person-to-manager, print the organizational hierarchy SQL: Given tables for customers, orders, and order items, find the average order value per customer in the last quarter Web Dev:

   • Explain the key HTTP methods (GET, POST, PUT, DELETE)
   • How are sessions managed in web applications?
   • Why use containers? How do they differ from VMs?
   • How do you handle CORS in APIs?
   • DFS Based
4. 4

   Technical Interview 360 min

   i do not got chance for this round, as rejected after round technical interview 2

What came up