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SDE - 2

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4 rounds | 5 Coding problems

Interview preparation journey

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Preparation
Duration: 6 months
Topics: Graph, Dynamic programming, System design, Algorithms, Multi threading
Tip
Tip

Tip 1 : don't go for hard level problems, first practice most of the medium level questions.
Tip 2 : Have a deep knowledge in one programming language (i prepared in java). You should be aware that how this language work from high level to machine level.

Application process
Where: Company Website
Eligibility: No
Resume Tip
Resume tip

Tip 1 : Keep your resume precise and simple, don't lie on your resume 
Tip 2 : Use simple templates.

Interview rounds

01
Round
Medium
Online Coding Interview
Duration60 minutes
Interview date6 Apr 2022
Coding problem1

It was an online assessment round of 60 minutes.

1. Design Question

Design a REST api which fetch data from the server (server path was provided) and filter the data according to the conditions and display on console.

Problem approach

Tip 1: knowledge about rest api is required here
Tip 2: you should me aware of java's builtin HTTPclient as third party libraries were not allowed

02
Round
Medium
Video Call
Duration60 minutes
Interview date18 Jun 2022
Coding problem2

It was a DSA round, 2 problem statements were asked.

1. Find power of a number

Easy
15m average time
80% success
0/40
Asked in companies
AmazonQuikrPayPal

Ninja is sitting in an examination hall. He is encountered with a problem statement, "Find ‘X’ to the power ‘N’ (i.e. ‘X’ ^ ‘N’). Where ‘X’ and ‘N’ are two integers."

Ninja was not prepared for this question at all, as this question was unexpected in the exam.

He is asking for your help to solve this problem. Help Ninja to find the answer to the problem.

Note :

For this question, you can assume that 0 raised to the power of 0 is 1.
Problem approach

First I gave o(n) solution but the interviewer asked to give optimised solution. 
So i used recursion to find solution of n/2 and then return 2 * n/2. This solution was accepted.

Try solving now

2. House Robber

Moderate
26m average time
0/80
Asked in companies
PayPalExpedia GroupGoldman Sachs

A thief wants to loot houses. He knows the amount of money in each house. He cannot loot two consecutive houses. Find the maximum amount of money he can loot.

Problem approach

First I provided the brute force recursive solution, but the interviewer asked for optimised solution.
I used DP approach to give O(n) solution.

Try solving now
03
Round
Medium
Video Call
Duration60 minutes
Interview date18 Jun 2022
Coding problem1

It was a 60 minutes system design round were interviewer check knowledge about HLD and LLD.

1. System design question

problem was to design a social media platform like facebook which can be scaled to handle traffic upto 10 millions users at a time.

Problem approach

Tip 1 : First ask about all the features which interviewer want to be implemented in the system.
Tip 2 : Focus on microservices pattern and how to make system loosely coupled 

04
Round
Medium
Video Call
Duration60 minutes
Interview date18 Jun 2022
Coding problem1

This was hiring manager's round. In this round the manager will decide whether you are a good fit for his/her team or not.

1. Puzzle

The interviewer asked about basic puzzles like the water jug puzzle, minimum comparison required to find the heavy ball out of 9 same balls using a beam balance.

Problem approach

Tip 1 : Stay calm and show confidence to the hiring manger
 

Here's your problem of the day

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

Skill covered: Programming

How do you remove whitespace from the start of a string?

Choose another skill to practice
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