PhysicsWallah interview experience Real time questions & tips from candidates to crack your interview

SDE - Intern

PhysicsWallah
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3 rounds | 5 Coding problems

Interview preparation journey

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Journey
I was not interested that much in Computer Science till I entered college and parents told to join CSE as my future option. When I started learning a coding language as part of curriculum it made me keen to learn more about different coding languages.
Application story
I always wanted to join IT company as it was my dream to work in a big company. I applied for this role when my senior told me he was working and a position is available that fits you. So I applied for the same and after that 2 interview rounds were scheduled.
Why selected/rejected for the role?
I was selected as I had practiced a lot of coding questions when I was in college. I basically took a course from Coding Ninjas to prepare and practice them.
Preparation
Duration: 2 months
Topics: Algorithms, C++, aptitude and reasoning, projects details, database management system, Data Structure,
Tip
Tip

Tip 1 : Gain in-depth understanding and confidence in Data Structures and get maximum insight of its concepts. Prepare minimum 2-3 projects and go through those projects completely. Have complete understanding and knowledge of how these project works and what logic has been implemented.
Tip 2 : Keep an eye on time and space complexity while attempting the questions. 
Tip 3 : Practice more on reasoning questions and aptitude related questions.

Application process
Where: Campus
Eligibility: 7
Resume Tip
Resume tip

Tip 1 : The resume should not be more than 1 page. Write only those skills, projects or achievements which you have completed yourselves and have thorough knowledge and ensure to write in brief and crisp only. Avoid unnecessary details like parent's name, photo, hobbies etc.
Tip 2 : Add a link to your GitHub, website, LinkedIn, were you can provide more details about you.

Interview rounds

01
Round
Medium
Online Coding Test
Duration70 mins
Interview date7 Feb 2023
Coding problem2

1. Check If Linked List Is Palindrome

Easy
15m average time
85% success
0/40
Asked in companies
AmazonThought WorksQuikr

You are given a Singly Linked List of integers. You have to return true if the linked list is palindrome, else return false.


A Linked List is a palindrome if it reads the same from left to right and from right to left.


Example:
The lists (1 -> 2 -> 1), (3 -> 4 -> 4-> 3), and (1) are palindromes, while the lists (1 -> 2 -> 3) and (3 -> 4) are not.
Problem approach

Use two pointer concept

Try solving now

2. Unique Paths

Moderate
25m average time
80% success
0/80
Asked in companies
BNY MellonCoinDCXAmazon

You are present at point ‘A’ which is the top-left cell of an M X N matrix, your destination is point ‘B’, which is the bottom-right cell of the same matrix. Your task is to find the total number of unique paths from point ‘A’ to point ‘B’.In other words, you will be given the dimensions of the matrix as integers ‘M’ and ‘N’, your task is to find the total number of unique paths from the cell MATRIX[0][0] to MATRIX['M' - 1]['N' - 1].

To traverse in the matrix, you can either move Right or Down at each step. For example in a given point MATRIX[i] [j], you can move to either MATRIX[i + 1][j] or MATRIX[i][j + 1].

Problem approach

Applied DFS

Try solving now
02
Round
Medium
Video Call
Duration60 mins
Interview date7 Feb 2023
Coding problem2

1. Square root (decimal)

Easy
10m average time
90% success
0/40
Asked in companies
UberVisaFacebook

You have been given two integers 'N' and 'D', Your task is to find the square root of the number 'N' with precision up to 'D' decimal places i.e. the difference between your answer and the correct answer should be less than 10 ^ (-D).

For example if N = 10 and D = 3, then your answer will be 3.162.

Problem approach

simple mathematical calculation

Try solving now

2. DBMS Questions

1. Explain ACID properties.
2. Normalization
2. Different keys

03
Round
Easy
HR Round
Duration20 minutes
Interview date3 Jul 2023
Coding problem1

HR round with managerial questions.

1. Basic HR Questions

1. Introduction

2. Why this company?

3. What are your hobbies?

Here's your problem of the day

Solving this problem will increase your chance to get selected in this company

Skill covered: Programming

What is recursion?

Choose another skill to practice
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