Punjab Engineering College (PEC) Placement Interview Questions

Round duration - 60 minutes
Round difficulty - Medium

This round consisted of a coding test containing 2 questions purely based on Data Structures and Algorithms.
One was a Dynamic Programming Problem, and 
the other one was a linked list question

• Q1. Count Ways to Climb Stairs Problem Given a staircase with a certain number of steps, you start at the 0th step, and your goal is to reach the Nth step. At ever...read more
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• Q2. Merge Sort Linked List Problem Statement You are given a singly linked list of integers. Your task is to sort the linked list using the merge sort algorithm. E...read more
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Round duration - 45 minutes
Round difficulty - Easy

Introduction first
Tell me about your projects. He said you have done quite a few projects in JavaScript so tell me
Akshat what is es6 in JavaScript. I was not able to answer that.
What is bootstrap?
What is the difference between div and span tags in HTML?
How many handshakes will take place if there are 6 persons? I told him the P & C approach and then he said no please explain in the normal way so I said sir it's 1+ 2 + 3 + 4 + 5 = 15.
Reverse a String in optimal way
What is a preprocessor and preprocessor directive?
What is typedef?
Have you done exception handling? Explain
Polymorphism and inheritance and explain all types of both.
There were no questions asked on OS and DBMS in this round

• Q1. Palindrome Substrings Given a string STR , your objective is to determine the total count of palindromic substrings within it. Input: The first line contains a...read more
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Round duration - 45 minutes
Round difficulty - Easy

Your intro.
Bubble sort algorithm
Remove a specific character from all positions in a given string (3 test cases given)
Explain runtime polymorphism
Find minimum number of insertions required to make a string palindrome (he said No DP to be used)

I was able to code and explain all of them.
Make ER diagram of your 4th semester Project
He asked me if I know abt normalization
He asked me a ques on normalization, I was not able to answer it, then he asked me to write an SQL query based on the same table, I answered that
Query -> Find the maximum salary in each department, wherein the department and salary fields were in two different tables
Then he asked, tell me the different pillars of OOPs.
He asked about my projects
He saw my resume.
He asked about how the online coding test was, what were the difficulties you faced.

• Q1. Delete a Node from a Linked List You are provided with a linked list of integers. Your task is to implement a function that deletes a node located at a specifi...read more
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