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BlackNGreen Backend Developer Interview Questions and Answers

Updated 5 Nov 2021

BlackNGreen Backend Developer Interview Experiences

1 interview found

I was interviewed in Sep 2021.

Round 1 - Video Call 

(2 Questions)

Round duration - 30 Minutes
Round difficulty - Easy

She asked me two problem one was on string and second one was on Linked List. and then she asked some topics from DBMS as Normalization, Keys and Query of getting second highest salary.

  • Q1. 

    Reverse Linked List Problem Statement

    Given a singly linked list of integers, return the head of the reversed linked list.

    Example:

    Initial linked list: 1 -> 2 -> 3 -> 4 -> NULL
    Reversed link...
  • Ans. 

    Reverse a singly linked list of integers and return the head of the reversed linked list.

    • Iterate through the linked list and reverse the pointers to point to the previous node instead of the next node.

    • Keep track of the previous, current, and next nodes while reversing the linked list.

    • Update the head of the reversed linked list as the last node encountered during the reversal process.

  • Answered by AI
  • Q2. 

    Reverse Words in a String: Problem Statement

    You are given a string of length N. Your task is to reverse the string word by word. The input may contain multiple spaces between words and may have leading o...

  • Ans. 

    Reverse words in a string while handling leading, trailing, and multiple spaces.

    • Split the input string by spaces to get individual words

    • Reverse the order of the words

    • Join the reversed words with a single space in between

    • Handle leading, trailing, and multiple spaces appropriately

  • Answered by AI

Interview Preparation Tips

Professional and academic backgroundI completed Computer Science Engineering from Indian Institute of Information Technology Design & Manufacturing. Eligibility criteria6 CGPABlackNgreen interview preparation:Topics to prepare for the interview - Data Structures and algorithms, OOPS, SQL, DBMS, Operating SystemTime required to prepare for the interview - 2 MonthsInterview preparation tips for other job seekers

Tip 1 : Practice 20-30 question of String to get the overall working of string program
Tip 2 : Linked List questions was asked
Tip 3 : Practicing SQL queries is must

Application resume tips for other job seekers

Tip 1 : Go through your projects technology very well because direct questions was from there
Tip 2 : Try to make sure if you mentioned anything in your resume then you should be having decent Idea of those things then only mention.

Final outcome of the interviewRejected

Skills evaluated in this interview

Interview questions from similar companies

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Naukri.com and was interviewed before Oct 2023. There were 2 interview rounds.

Round 1 - Technical 

(2 Questions)

  • Q1. Basic questions about projects
  • Q2. Design a get api .
  • Ans. 

    Design a GET API to retrieve user information.

    • Define the endpoint for the API (e.g. /users/:id)

    • Include query parameters for filtering (e.g. /users?role=admin)

    • Return user data in JSON format

    • Handle errors gracefully (e.g. return 404 if user not found)

  • Answered by AI
Round 2 - Technical 

(2 Questions)

  • Q1. Similar to first round based on project i have worked on my previous company.
  • Q2. Write a post APi
  • Ans. 

    To create a post API for a backend system

    • Define the endpoint for the API (e.g. /posts)

    • Set up the HTTP method (e.g. POST)

    • Handle the request data and process it accordingly

    • Implement the necessary validation and error handling

    • Return a response with the appropriate status code and data

  • Answered by AI

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
No response

I applied via Naukri.com and was interviewed in Jul 2024. There was 1 interview round.

Round 1 - Technical 

(2 Questions)

  • Q1. Can you provide a basic self-introduction?
  • Ans. 

    I am a backend developer with 5 years of experience in building scalable and efficient web applications.

    • 5 years of experience in backend development

    • Proficient in languages like Java, Python, and Node.js

    • Strong understanding of database management systems such as MySQL and MongoDB

    • Experience in building RESTful APIs and microservices

    • Familiar with cloud technologies like AWS and Azure

  • Answered by AI
  • Q2. Which project you working right now and what are the challenges
  • Ans. 

    I am currently working on a project to develop a new e-commerce platform for a client.

    • Implementing secure payment gateways

    • Optimizing database queries for faster load times

    • Integrating third-party APIs for shipping and inventory management

  • Answered by AI

I was interviewed in Mar 2017.

Interview Questionnaire 

8 Questions

  • Q1. Basics of networking
  • Q2. Data structures
  • Q3. Sql
  • Q4. Introduction
  • Q5. Final year project
  • Q6. Why should I hire you?
  • Ans. 

    I have the technical skills, experience, and passion to deliver high-quality software solutions.

    • I have a strong background in programming languages such as Java, Python, and C++.

    • I have experience working on complex software projects and collaborating with cross-functional teams.

    • I am passionate about staying up-to-date with the latest technologies and trends in software development.

    • I am a quick learner and have a strong...

  • Answered by AI
  • Q7. Why Ericsson?
  • Ans. 

    Ericsson is a global leader in telecommunications technology with a strong focus on innovation and career development.

    • Global leader in telecommunications technology

    • Strong focus on innovation

    • Opportunities for career development

  • Answered by AI
  • Q8. About relocation

Interview Preparation Tips

Round: Test
Experience: The test which I wrote was based on cocubes. quants was easy, one can easily score 50 percent if they refer rs agarwal and logical was easy but it takes more time and verbal was neither easy nor tough. One thing I want to advice try doing verbal first so that u can save time and then go to quant and logical. After the test we got the results out of 160 students 51 cleared the test. I was one among them.
Duration: 45 minutes
Total Questions: 45

Round: Technical Interview
Experience: Keep ur cool in the technical. people are friendly. Think before you answer twice they may ask u puzzles as well. So be prepared for it. Final year project is a must, they are gonna ask u the details how you implement stuffs in your project. After my technical out of 51 students around 30 cleared this round. I was one among them.

Round: HR Interview
Experience: Don't be scared guys. Hr is just a casual one. finally around 15 were selected from my college including me. I am very happy with the result. best of luck guys. Do well!!!
Tips: Keep your cool. stay confident that's all I can tell. Once you clear technical one can easily clear Hr round.

Skills: Communication, Technical Skill
College Name: JSS Academy of Technical Education - JSSATE

Interview Questionnaire 

4 Questions

  • Q1. Write a C code for printing Febonacci Series upto n elements
  • Ans. 

    C code for printing Fibonacci Series upto n elements

    • Declare three variables to store the current, previous and next numbers in the series

    • Initialize the previous and current variables to 0 and 1 respectively

    • Use a loop to print the next number in the series by adding the previous two numbers

    • Loop should run n times to print n elements in the series

  • Answered by AI
  • Q2. Question related to family background
  • Q3. What are your hobbies?
  • Q4. What are your strengths and weaknesses?

Interview Preparation Tips

Round: Test
Experience: Questions were from easy to moderate level. No negative marking, so attempt all.
Tips: Keep your mind open and practice aptitude problems on a daily basis.

Round: Group Discussion
Experience: There were 21 students selected out of which two teams of 10 and 11 students were formed. Both the groups were given a topic and each one of us had to express our views.
Tips: Don't get nervous, just speak whatever you think. Don't yell or speak at loudly, just keep calm and put your points forward.
Duration: 20 minutes

Round: Technical Interview
Experience: Apart from the above questions some puzzles and DBMS questions and a few basic C questions were also asked. We were given enough time to think and answer.
Tips: Do not be in a hurry. Think properly what you are going to say, whether it is right or not and then only answer.

Round: HR Interview
Experience: The HR round was a good one. He tried to test my thinking capabilities and reasoning capabilities
Tips: Answer every question honestly.

General Tips: All the four rounds were elimination rounds and the final result was announced based on cumulative performance. So, be patient and give your best.
Skill Tips: Try to answer every properly
Skills: IQ, Basic Coding Skills, Problem Solving Skills
College Name: NIT ALLAHABAD
Motivation: The company visited our college campus. Also, one of my relatives in in Ericsson at a very high  post and is quite happy working here.

Skills evaluated in this interview

I applied via Naukri.com and was interviewed before Jun 2020. There were 4 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. Linux servers questions, past experience tools amd technologies

Interview Preparation Tips

Interview preparation tips for other job seekers - They will ask many questions but work will something else.

I applied via Referral and was interviewed before May 2020. There were 5 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. More on oops and design patterns

Interview Preparation Tips

Interview preparation tips for other job seekers - 4 rounds of interview
Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
No response

I applied via Job Fair and was interviewed in Apr 2024. There were 2 interview rounds.

Round 1 - Coding Test 

Basic questions about coding

Round 2 - HR 

(2 Questions)

  • Q1. Basic hr questions
  • Q2. Salary discussion
Interview experience
5
Excellent
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Campus Placement and was interviewed before May 2023. There were 2 interview rounds.

Round 1 - One-on-one 

(1 Question)

  • Q1. Basic DSA round
Round 2 - Technical 

(1 Question)

  • Q1. Past projects and skills
Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Don’t add your photo or details such as gender, age, and address in your resume. These details do not add any value.
View all Resume tips
Round 2 - Aptitude Test 

It has basic aptitude question

Round 3 - Group Discussion 

If you unable to clear apti then there is a option for GD

Round 4 - Technical 

(2 Questions)

  • Q1. Basic question on technical stuffs are asked This is the L1 round. If u clear this then u go to L2 round.
  • Q2. Oops, Dsa, Dbms, Html,Css
Round 5 - Technical 

(1 Question)

  • Q1. This the final technical round which is called the L2 round
Round 6 - HR 

(1 Question)

  • Q1. The HR focus on your communication skills and why u want to join the company and personal stuffs.
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