Infosys private limited interview experience Real time questions & tips from candidates to crack your interview

System Engineer

Infosys private limited
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2 rounds | 3 Coding problems

Interview preparation journey

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Preparation
Duration: 3 Months
Topics: Data Structures, Pointers, OOPS, System Design, Algorithms, Dynamic Programming
Tip
Tip

Tip 1 : Do not rush into things. Learning takes time. Focus should be on the concepts and not just on leaving topics half-prepared. Devote 70% of both time and effort to DSA. I solved a total of around 500 questions on sites like GFG and Leetcode. Do not repeat similar questions just to increase the count of the number of questions

Tip 2 : Competitive Programming is a bonus and not a necessity, rather focus on core DSA based problems before trying CP. Do not pursue CP if you do not like it. Devote that extra time to core CS subjects and aptitude preparation.

Tip 3 : Projects play an important role too, do no ignore them. Try to get your hands dirty with a little bit of every field i.e., frontend, backend, and database.

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

Tip 1 : Try to make a single-page resume. Highlight skills, projects, and work experience more than CGPA. Ensure proper spacing and font to maintain professionalism.
Tip 2 : Do not lie on a resume. Everything written on your resume must be known by you in and out.

Interview rounds

01
Round
Easy
Online Coding Interview
Duration90 Minutes
Interview date10 Sep 2021
Coding problem1

1. MCA Questions

It's a MCQ based round consisting of 66 questions with medium difficulty . Topics Covered :


From Quantitive 


1) Profit /Loss ( I guess their fav )
2) Simple/Compound Interest
3) Mixtures , Allegations and Percentage
4) Time and Work
5) Distance 
6) Permutation , combination and probability

From Qualitative analytics - The questions asked from qualitative analysis are quite easy .If you have good practise on Seating Arrangements, Coding and Decoding, Number Series, Data Sufficiency, Syllogism, Clocks and Calendar, Data Interpretation etc on the topics you can answer maximum of the questions.

Verbal Ability - They can ask from any topics which are not hard but one should have a good practise on verbal questions before appearing for this round.

02
Round
Easy
Face to Face
Duration45 minutes
Interview date24 Sep 2021
Coding problem2

It is a technical + HR round where they will test your communication and logical skills. Question asked in this round are
1) Tell me about yourself - the basic question . 
2) They asked me to define one of my project mentioned in CV.
3) They asked 3 questions related to my project , what are the difficulties faced and why you use react.js not angular.js - I answered this pretty well
4) Tell me about ACID properties (DBMS question )
5) At last the interviewer asked my to write the code of quick sort.

1. Merge Sort

Easy
15m average time
85% success
0/40
Asked in companies
Wells FargoThought WorksAccenture

Given a sequence of numbers ‘ARR’. Your task is to return a sorted sequence of ‘ARR’ in non-descending order with help of the merge sort algorithm.

Example :

Merge Sort Algorithm -

Merge sort is a Divide and Conquer based Algorithm. It divides the input array into two-parts, until the size of the input array is not ‘1’. In the return part, it will merge two sorted arrays a return a whole merged sorted array.

subsequence

The above illustrates shows how merge sort works.
Note :
It is compulsory to use the ‘Merge Sort’ algorithm.
Problem approach

use divide ad Concur algorithm

Try solving now

2. Quick Sort

Moderate
10m average time
90% success
0/80
Asked in companies
SamsungPaytm (One97 Communications Limited)Bank Of America

You are given an array of integers. You need to sort the array in ascending order using quick sort.

Quick sort is a divide and conquer algorithm in which we choose a pivot point and partition the array into two parts i.e, left and right. The left part contains the numbers smaller than the pivot element and the right part contains the numbers larger than the pivot element. Then we recursively sort the left and right parts of the array.

Example:

Let the array = [ 4, 2, 1, 5, 3 ]
Let pivot to be the rightmost number.

example

After the 1st level partitioning the array will be { 2, 1, 3, 4, 5 } as 3 was the pivot. After 2nd level partitioning the array will be { 1, 2, 3, 4, 5 } as 1 was the pivot for the left part and 5 was the pivot for the right part. Now our array is sorted and there is no need to divide it again.

Problem approach

Simple Quick sort algorithm

Try solving now

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Skill covered: Programming

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