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SDE - 1

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2 rounds | 4 Coding problems

Interview preparation journey

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Preparation
Duration: 3 Months
Topics: Data Structures, Algorithms, OOPS, OS, DBMS
Tip
Tip

Tip 1 : Work on Competitive Programming skills. That is one thing most companies look out for during hiring. Solve at least 100 
questions from every topic.
Tip 2 : You should have at least 2 good projects on your resume. Only write the things that you are completely sure of.
Tip 3 : Work on CS fundamentals as well like -OOPS, OS, and DBMS. There will be MCQ questions from this in the coding round as well as in the 1:1 round

Application process
Where: Referral
Resume Tip
Resume tip

Tip 1 : Need at least 2 good projects on the resume. Write a short 2-3 lines summary of the project and the tech stack used.
Tip 2 : Resume should be 1 page only. Try to keep the Resume short with useful information only.
Tip 3 : Your Resume should clearly mention the skillset you have. Companies sometimes filter out Resume based on skillset only

Interview rounds

01
Round
Easy
Face to Face
Duration60 minutes
Interview date11 Jan 2021
Coding problem2

It was on zoom from 5PM.

1. Reverse The Array

Easy
15m average time
85% success
0/40
Asked in companies
GartnerInfo Edge India (Naukri.com)HCL Technologies

Given an array/list 'ARR' of integers and a position ‘M’. You have to reverse the array after that position.

Example:

We have an array ARR = {1, 2, 3, 4, 5, 6} and M = 3 , considering 0 
based indexing so the subarray {5, 6} will be reversed and our 
output array will be {1, 2, 3, 4, 6, 5}.
Problem approach

We can break down the complete array into small subarrays of size k and reverse them.

Try solving now

2. Operating System

  • What is a Thread? 
  • What are the differences between process and thread?
  • What is Thrashing?
Problem approach

Tip 1 : You have to focus on CS Fundamentals - OS, OOPS, DBMS, CN

02
Round
Easy
Face to Face
Duration60 minutes
Interview date16 Jan 2021
Coding problem2

It was a mix round where I was asked two problems. One was a coding problem and second one was the set of some basic DBMS questions

1. Longest Subarray Zero Sum

Moderate
18m average time
85% success
0/80
Asked in companies
AmazonOlaPayU

Given an array arr of length N consisting of positive and negative integers, return the length of the longest subarray whose sum is zero.

Problem approach

We can use hashing for this. store the sum till that index in a map. If you find same sum already present in the map then that subarray has zero sum

Try solving now

2. DBMS

  • What is database normalization?
  • What is Join?
  • What is Identity?
  • Some basic SQL Queries
Problem approach

Tip 1 : You have to focus on CS Fundamentals - OS, OOPS, DBMS, CN

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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