Visa Interview Experience

Here's my interview experience for visa(on-campus):
Round 1:
OA round on code signal with 4 questions 1 question straight from leetcode.
my advice solve 1,2,4 then question 3
Round 2:
The interviewer was very friendly ,started with basic introduction , then dwelve in my resume,

1. Asked my experience (Amazon ML school) and projects.
2. asked basic DBMS questions like ACID properties and difference between relational and non relational databases.
3. Asked basic OS questions like what is deadlock and how to prevent it.
4. Asked a basic DSA question that find second largest element in a array without using any inbuilt functions.
5. Asked me to write a SQL query for getting second highest salary of employees.

Round 3:
Started with basic introduction ,

1. level order traversal : https://leetcode.com/problems/binary-tree-level-order-traversal/description/
2. minimum depth of binary tree: https://leetcode.com/problems/minimum-depth-of-binary-tree/
3. single number: https://leetcode.com/problems/single-number-ii/description/
4. sliding window maximum:https://leetcode.com/problems/sliding-window-maximum/description/

Round 4:
it was more of a discussion round , I was asked in depth about my project , they asked how can we maintain the order of data ,which we send to the database.
Discussed it aboyt 30 min , arrived at solution.
Then he asked some basic Hr questions.

Verdict: Rejected (I lacked on the discussion part)
Hope it helps someone!!.
Best of luck!!