'Coding has over 700 languages', '67% of programming jobs aren’t in the technology industry', 'Coding is behind almost everything that is powered by electricity'
Persistent Systems interview experience Real time questions & tips from candidates to crack your interview
Software Engineer
Persistent Systems
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4 rounds | 5 Coding problems
Interview preparation journey
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Preparation
Duration: 1 month
Topics: OOPS, Data Structure(Stack, Queue, Linked List, Tree mainly)
Tip
Tip

Tip 1 : focus mainly on the oops concept in very details 
Tip 2 : data structures questions on the tree and linked list

Application process
Where: Linkedin
Eligibility: above 7 cgpa
Resume Tip
Resume tip

Tip 1 : Having a project is a must.
Tip 2 : good to share if you have any past experience of hackathon or internship.

Interview rounds
01
Round
Easy
Online Coding Interview
Duration90 minutes
Interview date19 Nov 2020
Coding problem2

The exam was in the day at noon. The exam consisted of some MCQ questions from technical subjects and some questions from math and reasoning.
1.Technical test: questions were from basic data structure, DBMS, oops, c and computer networks.
2. Aptitude: Questions were from math and reasoning like work problems, pipe problems, age problems, etc.
3. English: It had some reading compressions and spotting the error questions of easy level.
3. Coding round: This consisted of two questions that were to be solved in 45 mins.

1. Implement indexOf()
Moderate
25m average time
70% success
0/80
Asked in companies
Samsung R&D InstituteDell TechnologiesUrban Company (UrbanClap)
Try solving now
2. First non repeating character
Easy
15m average time
80% success
0/40
Asked in companies
HCL TechnologiesCognizantHCL Technologies
Try solving now
02
Round
Medium
Video Call
Duration40 minutes
Interview date28 Nov 2020
Coding problem1

The interview was scheduled in the morning.
The interviewer asked me back to back questions based on oops concepts, data structure and DBMS.
1.What is Constructor
2.Properties of constructor
3.What is constructor and syntax
4.difference between java and c++
5.Java version I am using currently.
6.Difference between JDK and JRE.
7.Abstract class and method
8.Abstraction
9.Encapsulation
10.What is Data structures and types 
11.Push pop operations of stack
12.Array and LinkedList difference
13.Transaction and types of transaction in DBMS
14.Normalisation and explain its types
15.Triggers in DBMS
16.How Transaction is control 
17.Joins 
18.TCP and UDP difference 
19.Http what is protocols and it's port no
20.Proxy server
21.Layers of tcp/ip

1. LCA In A BST
Moderate
15m average time
85% success
0/80
Asked in companies
CiscoGoldman SachsMorgan Stanley
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03
Round
Medium
Video Call
Duration30 minutes
Interview date28 Nov 2020
Coding problem1

The interview was scheduled for the evening on the same day.
He again asked me questions on topics from oops and Data Structure.
1. encapsulation
2. polymorphism
3. constructor can be inherited or not, 
4. Difference between HashSet & tree set 
5. What is the concurrent collection and synchronized collection
6., Difference between abstract and interface,
7.can abstract method be private or static
8. what is 2 nf , 
9.what is overloading
10. What is a linked list.
11. Then, he asked me how can I detect a loop in a liked list.

Coding-detect a loop in a linked list.
12. After the coding question was done he asked me the complexity of my solution.
13. Finally, he said if I had any questions for him. 

I said no and the interview ended.

1. Cycle Detection in a Singly Linked List
Moderate
15m average time
80% success
0/80
Asked in companies
ProtiumInfosysDelhivery
Try solving now
04
Round
Easy
HR Round
Duration10 minutes
Interview date30 Nov 2020
Coding problem1

The interview was at the noon
He asked me to Introduce Myself and asked few basic questions.

1. Basic HR Questions
Problem approach
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