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GS Lab C Developer Interview Questions and Answers

Updated 31 Mar 2024

GS Lab C Developer Interview Experiences

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C Developer Interview Questions & Answers

user image Anonymous

posted on 31 Mar 2024

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

I applied via Naukri.com and was interviewed before Mar 2023. There were 4 interview rounds.

Round 1 - Technical 

(1 Question)

  • Q1. Inheritance, polymorphism, STL, memory management, containership. Questions on vectors, strings.
Round 2 - Technical 

(1 Question)

  • Q1. Deep dive into your resume, project discussion, current responsibilities, problem solving queries, puzzles.
Round 3 - Behavioral 

(1 Question)

  • Q1. Why GS Lab ? Why you want to switch ? Current Tech Stack ? Their Project Highlights. How you would debug a core file ? Previous role and experience.
Round 4 - HR 

(1 Question)

  • Q1. Introduction Why GS Lab ? Work Culture discussions. Salary Expectation discussion

Top trending discussions

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Interview Tips & Stories
1w (edited)
a team lead
Why are women still asked such personal questions in interview?
I recently went for an interview… and honestly, m still trying to process what just happened. Instead of being asked about my skills, experience, or how I could add value to the company… the questions took a totally unexpected turn. The interviewer started asking things like When are you getting married? Are you engaged? And m sure, if I had said I was married, the next question would’ve been How long have you been married? What does my personal life have to do with the job m applying for? This is where I felt the gender discrimination hit hard. These types of questions are so casually thrown at women during interviews but are they ever asked to men? No one asks male candidates if they’re planning a wedding or how old their kids are. So why is it okay to ask women? Can we please stop normalising this kind of behaviour in interviews? Our careers shouldn’t be judged by our relationship status. Period.
Got a question about GS Lab?
Ask anonymously on communities.

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I appeared for an interview before Mar 2021.

Round 1 - Coding Test 

(3 Questions)

Round duration - 60 minutes
Round difficulty - Medium

21 students were shortlisted from the 1st MCQ round and in this round we were asked to write the codes (function only) of 3 questions in 1 hour time.

  • Q1. 

    Rotting Oranges Problem Statement

    You are given a grid containing oranges where each cell of the grid can contain one of the three integer values:

    • 0 - representing an empty cell
    • 1 - representing a fre...
  • Q2. 

    Majority Element Problem Statement

    Given an array/list 'ARR' consisting of 'N' integers, your task is to find the majority element in the array. If there is no majority element present, return -1.

    Exampl...

  • Q3. 

    Maximum Path Sum Between Two Leaves Problem Description

    You are provided with a non-empty binary tree in which each node contains a non-negative integer value. Your task is to find and return the maximum ...

  • Ans. 

    Find the maximum path sum between two leaf nodes in a binary tree.

    • Traverse the tree to find the maximum path sum between two leaf nodes.

    • Keep track of the maximum sum found so far.

    • Consider all possible paths between leaf nodes.

    • Handle cases where the tree has only a single leaf node.

    • Implement a recursive function to calculate the maximum path sum.

  • Answered by AI
Round 2 - Face to Face 

(3 Questions)

Round duration - 60 minutes
Round difficulty - Medium

This was a technical round with DSA based questions.

  • Q1. 

    N-th Node From The End Problem Statement

    You are given a Singly Linked List of integers. The task is to find the N-th node from the end of the list.

    Example:

    Input:
    If the given list is (1 -> -2 -&g...
  • Ans. 

    Find the N-th node from the end of a Singly Linked List of integers.

    • Traverse the list to find the length L of the list.

    • Calculate the position of the N-th node from the beginning as L - N + 1.

    • Traverse the list again to reach the calculated position and return the node's value.

  • Answered by AI
  • Q2. 

    LCA of Binary Tree Problem Statement

    You are given a binary tree consisting of distinct integers and two nodes, X and Y. Your task is to find and return the Lowest Common Ancestor (LCA) of these two nodes...

  • Q3. 

    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...

Round 3 - Face to Face 

(3 Questions)

Round duration - 60 minutes
Round difficulty - Easy

Technical Interview round with questions based on DSA

  • Q1. 

    Minimum Time To Solve The Problems

    Given 'N' subjects, each containing a certain number of problems, and 'K' friends, assign subjects to friends such that each subject goes to exactly one friend, maintain...

  • Q2. What is grammar in the context of compiler design?
  • Ans. 

    Grammar in compiler design defines the syntax and structure of a programming language.

    • Grammar specifies the rules for forming valid statements in a programming language.

    • It consists of a set of production rules that define how valid programs can be constructed.

    • There are different types of grammars such as context-free grammar, regular grammar, etc.

    • Example: In C programming language, the grammar specifies that a for loop...

  • Answered by AI
  • Q3. What is a token in compiler design?
  • Ans. 

    A token in compiler design is a basic unit of syntax that the compiler can understand and process.

    • Tokens are the smallest units of a program that are meaningful to the compiler.

    • Examples of tokens include keywords, identifiers, operators, and punctuation symbols.

    • Tokens are generated by the lexical analysis phase of the compiler.

    • Tokens are used by the parser to build the abstract syntax tree of the program.

  • Answered by AI
Round 4 - Video Call 

(3 Questions)

Round duration - 60 minutes
Round difficulty - Easy

Technical round with questions on DSA and Compiler Design mainly. He told me that you’ll be having your final HR round in some time. I knew that I was going well because he seemed to be quite satisfied with my answers.

  • Q1. 

    Sum Root to Leaf Numbers

    You are given an arbitrary binary tree consisting of N nodes, each associated with an integer value from 1 to 9. Each root-to-leaf path can be considered a number formed by concat...

  • Q2. What is a regular language?
  • Ans. 

    A regular language is a language that can be recognized by a finite automaton.

    • Regular languages can be described by regular expressions.

    • Regular languages are closed under union, concatenation, and Kleene star operations.

    • Examples of regular languages include the set of all strings over an alphabet that contain an even number of 'a's.

  • Answered by AI
  • Q3. What are NP and NP-Hard problems?
  • Ans. 

    NP problems are decision problems that can be verified in polynomial time, while NP-Hard problems are at least as hard as the hardest problems in NP.

    • NP problems can be verified in polynomial time but not necessarily solved in polynomial time.

    • NP-Hard problems are at least as hard as the hardest problems in NP, but may not be in NP themselves.

    • Examples of NP problems include the subset sum problem and the traveling salesm...

  • Answered by AI
Round 5 - HR 

Round duration - 30 minutes
Round difficulty - Easy

That was the round for which I’ve been waiting for hours 
She was very friendly and nice to talk to. It didn’t seem that I was talking to the HR. It was more like talking to a friend. Finally we discussed about the pay-scale and work culture in Accolite.

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAAccolite Digital Pvt Ltd interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 6 monthsInterview preparation tips for other job seekers

Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.

Application resume tips for other job seekers

Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.

Final outcome of the interviewSelected

Skills evaluated in this interview

C Developer Interview Questions Asked at Other Companies

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Q1. String Transformation Problem Given a string (STR) of length N, y ... read more
asked in UBS
Q2. Merge K Sorted Arrays Problem Statement Given 'K' different array ... read more
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Q3. Sort 0 1 2 Problem Statement Given an integer array arr of size ' ... read more
asked in UBS
Q4. Find Maximum Number by At-most K Swaps Given an array of non-nega ... read more
asked in UBS
Q5. BST Node Deletion Problem Given a binary search tree (BST) and a ... read more

I applied via Campus Placement and was interviewed in Jun 2022. There were 4 interview rounds.

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 tips
Round 2 - Coding Test 

Basic dsa plus aptitude total of 50 ques

Round 3 - Technical 

(1 Question)

  • Q1. Array and array matrix coding question and some logical question
Round 4 - HR 

(1 Question)

  • Q1. Noarmal hr question and then some logical tricky question , situation based question

Interview Preparation Tips

Interview preparation tips for other job seekers - logical question read throughly plus dsa question were not that hard
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 - One-on-one 

(2 Questions)

  • Q1. What is treeset and weakhashmap?
  • Ans. 

    TreeSet is a sorted set implementation in Java. WeakHashMap is a hash table-based Map implementation with weak keys.

    • TreeSet is implemented using a tree structure and maintains elements in sorted order.

    • WeakHashMap is a Map implementation that allows keys to be garbage collected when they are no longer referenced.

    • WeakHashMap is useful for caching or memoization where the keys are not always needed and can be garbage coll...

  • Answered by AI
  • Q2. What is comparable and comparator?
  • Ans. 

    Comparable and Comparator are interfaces used for sorting objects in Java.

    • Comparable interface is used to define the natural ordering of objects based on their own class.

    • Comparator interface is used to define the ordering of objects based on a separate class.

    • Comparable interface has compareTo() method while Comparator interface has compare() method.

    • Comparable interface is implemented by the class whose objects need to ...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Mostly they asked questions based on core java springboot

Skills evaluated in this interview

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

I applied via Campus Placement and was interviewed in Jun 2024. There were 2 interview rounds.

Round 1 - Aptitude Test 

78 mcq questions and 2 dsa

Round 2 - Coding Test 

Coding based round on dsa

I applied via Campus Placement and was interviewed before Apr 2021. There were 2 interview rounds.

Round 1 - Technical 

(1 Question)

  • Q1. Fundamentals based upon the role
Round 2 - Technical 

(1 Question)

  • Q1. Basic advance question into the technical skills like if you’re applying for backend role and your preferred language is java then how does the stack and queue works

Interview Preparation Tips

Topics to prepare for Quantiphi Analytics Solutions Private Limited Software Developer interview:
  • Javascript
  • promises
  • Timing Closure
  • React.Js
  • Router
  • axios
  • crud operations
Interview preparation tips for other job seekers - You can enhance your technical skills while working but what they Check is your logic and approach towards the problem

I appeared for an interview before Nov 2020.

Round 1 - Coding Test 

(1 Question)

Round duration - 90 Minutes
Round difficulty - Medium

  • Q1. 

    Fruits and Baskets Problem Statement

    You are given 'n' fruit trees planted along a road, numbered from 0 to n-1. Each tree bears a fruit type represented by an uppercase English alphabet. A Ninja walking ...

Round 2 - Video Call 

(1 Question)

Round duration - 30 Minutes
Round difficulty - Medium

Was Shortlisted For this round with in total of 22 students, 7 in my profile.
It was Technical round with 30 mins of time allotted.
The interviewer was friendly, started with basic questions about me followed by project specific and then a puzzle.

  • Q1. 

    Sort 0 1 2 Problem Statement

    Given an integer array arr of size 'N' containing only 0s, 1s, and 2s, write an algorithm to sort the array.

    Input:

    The first line contains an integer 'T' representing the n...
Round 3 - HR 

Round duration - 20 Minutes
Round difficulty - Hard

The interview was scheduled for 15 mins and 12 students were shortlisted for this round. 5 in my profile.
The interviewer didn't on his video whereas mine was, the interviewer was friendly and maintained a poker voice.
Asked Basic HR questions but crossed questioned several times.

Interview Preparation Tips

Eligibility criteria6.5 CGPAQuantiphi interview preparation:Topics to prepare for the interview - Data Structures and Algorithms, OOPS Concepts, Machine Learning (Basic Theory), Operating sysytem, Database Management System, Computer NetworksTime required to prepare for the interview - 4 MonthsInterview preparation tips for other job seekers

Tip 1 :Practice at least 3-4 coding questions daily. Start from basics of Pointers and Array and progress to Algo and Data structure specific like DP and Graphs. Try to time your sessions into 15-20 mins. 
Tip 2 : Have Patience don't rush into problem solving, understand the Algo/Data structure first and then look for common problems for a particular Algo/Data structure.
Tip 3 : Have Basic Knowledge about all CS subjects, no need for in depth. Just cover Top 100 interview questions for each subject and topics covered in GFG and CodeStudio.

Application resume tips for other job seekers

Tip 1 : Have at least 3-4 Projects in your resume but on diverse bases, like 1 ML based, 1-2 DBMS 1 with Computer vision/ Frontend. Don't obsess over internships so much.
Tip 2 : Be well verse with projects you put in resume, and specify your particular job role if a team project.
Tip 3 : Mention some extra curricular activities or Interests and hobbies (Non Tech) , if you sync with interviewer then it could be beneficial.

Final outcome of the interviewSelected

Skills evaluated in this interview

Are these interview questions helpful?
Interview experience
3
Average
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Approached by Company and was interviewed in Jun 2024. There were 3 interview rounds.

Round 1 - Technical 

(3 Questions)

  • Q1. REST API for User CRUD
  • Ans. 

    Design a RESTful API for CRUD operations on user resources.

    • Use HTTP methods like GET, POST, PUT, DELETE for CRUD operations

    • Create endpoints like /users for listing all users, /users/{id} for specific user

    • Use status codes like 200 for success, 404 for not found, 400 for bad request

    • Implement authentication and authorization mechanisms for security

    • Include request and response body formats like JSON or XML

  • Answered by AI
  • Q2. Two Sum Leetcode problem
  • Q3. Basic questions based on the candidate technical skills
Round 2 - Technical 

(2 Questions)

  • Q1. Basics to Intermediate level of questions based on the skills mentioned in the resume
  • Q2. Projects related discussions
Round 3 - Document Verification 

(1 Question)

  • Q1. I was informed to upload the supporting documents. ( They rejected me after this eventhough all my documents are genuine )

Interview Preparation Tips

Interview preparation tips for other job seekers - The interviewer's are friendly. Be prepared as per your resume.

Skills evaluated in this interview

I applied via Approached by Company and was interviewed in May 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 

(1 Question)

  • Q1. Polymorphism ..Pure virtual function ..oops concept ..Design pattern ..Smart printer STL

Interview Preparation Tips

Interview preparation tips for other job seekers - Always be patience and keep giving the interviews and never give up ..Clear your basics ..Will not advice you to read this or that .. Whatever is your domain and language have solid understanding on that
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 Jul 2023. There were 3 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 - Coding Test 

There was coding test in which we were asked graph based question along which cs fundamental mcqs.

Round 3 - Technical 

(1 Question)

  • Q1. Parenthesis match (using stack),DBMS,OS questions, OOPS questions

GS Lab Interview FAQs

How many rounds are there in GS Lab C Developer interview?
GS Lab interview process usually has 4 rounds. The most common rounds in the GS Lab interview process are Technical, Behavioral and HR.
How to prepare for GS Lab C Developer interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at GS Lab. The most common topics and skills that interviewers at GS Lab expect are Data Structures, Linux, Algorithms, Build and C++.

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Overall Interview Experience Rating

4/5

based on 1 interview experience

Difficulty level

Moderate 100%

Duration

2-4 weeks 100%
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