Paytm SDE Interview Experience | On Campus 2020

Last Updated : 01 Sep, 2020

Round 1: Online Assessment, 3 coding questions:

Given an Array and a digit k, return the number with maximum occurrence of digit k.
Check if a binary tree is subtree of another binary tree
Largest Sum Contiguous Subarray

After this, around 50 students were shortlisted for the interviews. All 3 rounds were technical.

Round 1: Questions related to SQL queries, producer consumer problem, deadlock and its solution, semaphores and locks. 2 coding questions were asked:

Reverse a string using recursion.
Convert Binary tree to Doubly linked list.

Code had to be executed on IDE with screen sharing turned on.

Round 2:

Some questions around inheritance and OOPs concepts, as well as discussion on internship projects. Code had to be written on Google Docs.

Round 3: Introduction and discussion on projects followed by 1 coding question.

LRU Cache Implementation
Code had to be written on codepad.

Overall they expect you to write fully optimised production level code. Target should be to complete at least 2 questions in 45 mins.

Tips: Do not neglect CS fundamentals.

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