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HackerRank Backend Software Engineer Interview Questions and Answers

Updated 26 Dec 2024

HackerRank Backend Software Engineer Interview Experiences

1 interview found

Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Coding Test 

2 simple questions were asked and related time and space complexity was asked.
Use any language

Interview questions from similar companies

Interview Preparation Tips

Round: Test
Experience: A coding test (Students were asked to bring Laptops)
Tips: Be thorough with C/C++, networking, OS, Data structures and architecture
Duration: 90 minutes

Round: Interview
Experience: 3 rounds of interview, one hour each, all technical 
Interview Process:All the three rounds are oriented around programming. A lot of focus was given to Data structures, C/C++, OS and algorithmsThe code from previous test is shown and they expect you to fix any bugs if thereThe interviewers are quietly friendly and help if you get stuck at any pointIf you do have any related projects, anticipate some thorough questions on that
Tips: Though the interviewers are helpful, get your basics clear early on. Don't rely on them.Practice coding sessions, a lot of companies have them as a shortlisting criteria.

College Name: IIT Madras

Interview Preparation Tips

Round: Test
Experience: PAPER DURATION: 3 hours
NO. OF QUESTIONS: 2 (20 marks each)
MAXIMUM MARKS: 20*2 = 40 marksQUESTION 1:
JSON Prettier:-Write a program which takes JSON as input and gives prettified JSONYou need to read JSON from STDIN. Input gives one line of uglified JSON.Output should be formatted JSON. Check the standard output link.Use 2 white spaces (not‘\t’) for one indentation.SAMPLE INPUT:{“group” : {list : [1,2,3]}, “list” : [“a”,”b”,”c”]}SAMPLE OUTPUT:{“group” : {List : [1,2,3]},“list” : [“a”,”b”,”c”]}EXPLANATION: Input will be uglifiedjson in one line and output will be prettified format of that. QUESTION 2:XML parse plus series computationEvaluate an expression given in XML format. Keys will be Expr- contains the entire expression. Elem – contains the digit, sum, Prod- contains two or more keys whose evaluation needs to be summed or multiplied respectively. Sub will contain 2 keys or more, where the second key onwards will have to be subtracted from the first one. Div- will contain 2 keys in which first key will need to be divided by second. SAMPLE INPUT:4673 SAMPLE OUTPUT:
20EXPLANATION:Input will be xml file through standard input. End of xml file marked by .
Duration: 180 minutes
Total Questions: 2

College Name: NA
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Referral and was interviewed before Jun 2022. There were 2 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Technical 

(3 Questions)

  • Q1. Linux commands,
  • Q2. Cloud technologies different services (iaas, paas, saas)
  • Ans. 

    Cloud technologies offer different services like IaaS, PaaS, and SaaS for varying levels of control and management.

    • IaaS (Infrastructure as a Service) provides virtualized computing resources over the internet, such as virtual servers and storage.

    • PaaS (Platform as a Service) offers a platform allowing customers to develop, run, and manage applications without dealing with infrastructure.

    • SaaS (Software as a Service) deli...

  • Answered by AI
  • Q3. What do you know AWS

Interview Preparation Tips

Interview preparation tips for other job seekers - Brush up OS basics and cloud technologies.

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Selected Selected

I applied via Company Website and was interviewed before Feb 2023. There were 3 interview rounds.

Round 1 - Coding Test 

Discussion about OOPS concepts and String related program

Round 2 - Coding Test 

Program on Recursion and Array

Round 3 - HR 

(2 Questions)

  • Q1. Strength and Weakness
  • Q2. Reason for joining with company
Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Recruitment Consulltant and was interviewed before Apr 2023. There were 3 interview rounds.

Round 1 - Coding Test 

There was coding test

Round 2 - Technical 

(2 Questions)

  • Q1. 2 technical rounds
  • Q2. Merge sort algorithm
  • Ans. 

    Merge sort is a divide and conquer algorithm that divides the input array into two halves, sorts them separately, and then merges them back together in sorted order.

    • Divide the input array into two halves

    • Recursively sort each half

    • Merge the sorted halves back together

  • Answered by AI
Round 3 - Behavioral 

(1 Question)

  • Q1. Leetcode Easy question

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Campus Placement and was interviewed in Mar 2023. There were 4 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Aptitude Test 

Aptitude Test with 1 coding question and 8 other aptitude questions

Round 3 - One-on-one 

(1 Question)

  • Q1. DSA questions with some dbms questions.
Round 4 - One-on-one 

(1 Question)

  • Q1. DSA + SQL query writing questions. Do revise SQL before interview.
Interview experience
3
Average
Difficulty level
Hard
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Campus Placement and was interviewed in Sep 2023. There were 4 interview rounds.

Round 1 - Aptitude Test 

Aptitude test was of 1 hr

Round 2 - Coding Test 

It was about 1 hr duration

Round 3 - Technical 

(2 Questions)

  • Q1. What do you know about oops
  • Ans. 

    Object-oriented programming paradigm focusing on objects and classes

    • Encapsulation: Bundling data and methods that operate on the data into a single unit (object)

    • Inheritance: Ability of a class to inherit properties and behavior from another class

    • Polymorphism: Ability to present the same interface for different data types

    • Abstraction: Hiding the complex implementation details and showing only the necessary features

  • Answered by AI
  • Q2. Tell me about encapsulation
  • Ans. 

    Encapsulation is the concept of bundling data and methods that operate on the data into a single unit.

    • Encapsulation helps in hiding the internal state of an object and restricting access to it.

    • It allows for better control over the data by preventing outside interference.

    • Encapsulation also promotes code reusability and modularity.

    • Example: In object-oriented programming, classes encapsulate data fields and methods to ope

  • Answered by AI
Round 4 - HR 

(2 Questions)

  • Q1. How do you manage your team
  • Q2. Why should I hire you

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Coding Test 

2 Query question and 3 coding questions

Round 2 - Technical 

(4 Questions)

  • Q1. Basic oops , Java script and Networking questions.
  • Q2. What is object orienteered programming.
  • Ans. 

    Object oriented programming is a programming paradigm based on the concept of objects, which can contain data and code.

    • Objects are instances of classes, which define the structure and behavior of the objects.

    • Encapsulation, inheritance, and polymorphism are key principles of object oriented programming.

    • Example: Java, C++, Python are popular languages that support object oriented programming.

  • Answered by AI
  • Q3. Different Events in java script
  • Ans. 

    Events in JavaScript are actions or occurrences that happen in the browser that the code can respond to.

    • Events can be triggered by user actions (like clicking a button), browser actions (like page load), or system events (like a timer expiring)

    • Event listeners are used to listen for and respond to events

    • Common events include click, mouseover, keydown, submit, etc.

  • Answered by AI
  • Q4. Event listeners
Round 3 - Coding Test 

Project , coding question, DBMS

Round 4 - HR 

(1 Question)

  • Q1. Basic personal details

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Aptitude Test 

Please check aptitude question in google

Round 2 - Coding Test 

Related to Javascript

Round 3 - HR 

(1 Question)

  • Q1. Expectations and why do you want to join?
Round 4 - Group Discussion 

Discussion related to company

HackerRank Interview FAQs

How many rounds are there in HackerRank Backend Software Engineer interview?
HackerRank interview process usually has 1 rounds. The most common rounds in the HackerRank interview process are Coding Test.

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HackerRank Backend Software Engineer Interview Process

based on 1 interview

Interview experience

3
  
Average
View more

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