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

Digital Specialist Engineer

Infosys private limited
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2 rounds | 7 Coding problems

Interview preparation journey

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Journey
I have got this opportunity to appear for this role in 2021 through hackwithinfy which was organised by infosys . It was a 3 hour coding competition in which they asked 3 questions of medium to hard level.
Application story
My placement cell informed me for this hackwithinfy 2021 contest , which was a great opportunity of getting an employment offer from infosys . Also they choose roles for candidates on the basis of their performance in this competition.
Why selected/rejected for the role?
I got selected for the role of digital specialist engineer because out of 3 questions asked i was able to solve only two of them .
Preparation
Duration: 2-4 months
Topics: Data Structures , Operating System , SDLC , Basics and advanced topics of any particular language(Python in my case) , Aptitude and reasoning questions
Tip
Tip

Tip 1 : Start practicing coding questions as well as basics of computer science fundamentals
Tip 2 : If you are at beginner level then while solving coding questions try to build logic first then try its naive approach and then try to optimize it.
Tip 3 : Keep check of how much time it is taking to solve a question .Don't spend more than 30 - 45 minutes on a single question .

Application process
Where: Other
Eligibility: No criteria
Resume Tip
Resume tip

Tip 1 : Add only those skills which you have gone through in past and at least you know their fundamentals .
Tip 2 : Try to add the projects according to the tech stack they are asking for . It strengthens your chances of selection for future process.
Tip 3 : Once a wise man said "Tailor your resume frequently " XD

Interview rounds

01
Round
Medium
Online Coding Test
Duration180 minutes
Interview date7 May 2021
Coding problem3

Duration of round = 3:00PM
3 programming questions 
Platform was fully proctored (You cannot switch tabs, also video is turned on throughout the contest)

1. Compress the String

Moderate
25m average time
60% success
0/80
Asked in companies
AdobeMathworksHarman International

Ninja has been given a program to do basic string compression. For a character that is consecutively repeated more than once, he needs to replace the consecutive duplicate occurrences with the count of repetitions.

Example:

If a string has 'x' repeated 5 times, replace this "xxxxx" with "x5".

The string is compressed only when the repeated character count is more than 1.

Note :

The consecutive count of every character in the input string is less than or equal to 9.
Problem approach

Step 1 : This was pretty basic question . 
Step 2 : I answered in python and if you know about frequently used methods in python , you can solve this pretty easily .

Try solving now

2. Longest Increasing Subsequence

Moderate
0/80
Asked in companies
Paytm (One97 Communications Limited)PayUGoldman Sachs

'N' students are standing in a row. You are given the height of every student standing in the row. Your task is to find the longest strictly increasing subsequence of heights from the row such that the relative order of the students does not change.

A subsequence is a sequence that can be derived from another sequence by deleting zero or more elements without changing the order of the remaining elements.
Problem approach

Step 1 : First i have started with recursive approach and tried to obtain a recursive relation in the problem.
Step 2 : Then i have encountered the overlapping subproblems and stored these subproblems in a dp array which made my solution optimized .

Try solving now

3. Minimum Sum in matrix

Moderate
15m average time
85% success
0/80
Asked in companies
OlaTata Consultancy Services (TCS)Amazon

You are given a 2D matrix ‘ARR’ of size ‘N x 3’ having integers, where ‘N’ is the number of rows.

Your task is to find the smallest sum possible while taking one element from each row.

The rules for selecting elements are as follows-

1. In a row, after selecting an element at a given position, you cannot select the element directly below it
2. You can only select elements that are not directly below the previously selected element.
Try solving now
02
Round
Medium
Face to Face
Duration40 minutes
Interview date6 Jul 2021
Coding problem4

Timing - 11:00 AM
Platform - Webex
Interviewer name - Praseeda Nair

1. OOPS questions

Describe different OOPs concepts? Then she started cross questioning among them.

Problem approach

Tip 1 : Be confident.
Tip 2 : Take your time before answering.
Tip 3 : Speak slowly it gives an impression of your professionalism.

2. Conceptual Question

Difference between method overloading and overriding?She also asked how to implement both.

Problem approach

Tip 1 : These questions are also asked before . So try to go for previous interview archives.
Tip 2 : Give a crisp answer. 
Tip 3 : In case of any doubt you can take help from the interviewer.

3. Conceptual Question

Since i was an ECE student . She asked about difference between microprocessor and microcontrollers.

Problem approach

Tip 1:If you are from different branch other than CS/IT.It is expected they can ask you basic questions from your branch.
Tip 2:I gave answer in pointers.Also provided an example of both.

4. Technical Question

She asked me in which language i am confident and asked relevant questions from that.

Problem approach

Tip 1:Have a good understanding of atleast one language.
Tip 2:Also know what are the different domains in which you can work with the given language.

Here's your problem of the day

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

Skill covered: Programming

To make an AI less repetitive in a long paragraph, you should increase:

Choose another skill to practice
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