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24/7 Customer SDE-2 Interview Questions and Answers

Updated 21 Mar 2022

24/7 Customer SDE-2 Interview Experiences

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SDE-2 Interview Questions & Answers

user image Anonymous

posted on 21 Mar 2022

I was interviewed before Mar 2021.

Round 1 - Face to Face 

(2 Questions)

Round duration - 60 minutes
Round difficulty - Medium

Technical Interview round with questions on DSA.

  • Q1. 

    LRU Cache Design Question

    Design a data structure for a Least Recently Used (LRU) cache that supports the following operations:

    1. get(key) - Return the value of the key if it exists in the cache; otherw...

  • Ans. 

    Design a Least Recently Used (LRU) cache data structure that supports get and put operations with capacity constraint.

    • Use a combination of hashmap and doubly linked list to implement the LRU cache.

    • Keep track of the least recently used item and evict it when the cache reaches its capacity.

    • Update the position of an item in the cache when it is accessed or updated.

    • Handle both get and put operations efficiently to maintain...

  • Answered by AI
  • Q2. 

    Minimum Number of Platforms Problem

    Your task is to determine the minimum number of platforms required at a railway station so that no train has to wait.

    Explanation:

    Given two arrays:

    • AT - represent...
  • Ans. 

    The task is to determine the minimum number of platforms required at a railway station so that no train has to wait.

    • Sort the arrival and departure times arrays in ascending order.

    • Initialize two pointers, one for arrival and one for departure.

    • Increment the platform count when a train arrives and decrement when it departs.

    • Keep track of the maximum platform count needed.

    • Return the maximum platform count as the minimum num

  • Answered by AI
Round 2 - Face to Face 

(1 Question)

Round duration - 45 minutes
Round difficulty - Medium

Technical Interview round with DSA based questions.

  • Q1. 

    Reverse a Linked List Problem Statement

    You are given a Singly Linked List of integers. Your task is to reverse the Linked List by changing the links between nodes.

    Input:

    The first line of input contai...
  • Ans. 

    Reverse a given singly linked list by changing the links between nodes.

    • Iterate through the linked list and reverse the links between nodes

    • Use three pointers to keep track of the current, previous, and next nodes

    • Update the links between nodes to reverse the list

    • Return the head of the reversed linked list

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 1 years of experience24/7 customer private limited 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 interviewRejected

Skills evaluated in this interview

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I was interviewed before May 2021.

Round 1 - Telephonic Call 

(1 Question)

Round duration - 30 minutes
Round difficulty - Medium

  • Q1. 

    Remove Consecutive Duplicates Problem Statement

    Given a string S, your task is to recursively remove all consecutive duplicate characters from the string.

    Input:

    String S

    Output:

    Output string

    Constr...

  • Ans. 

    Recursively remove consecutive duplicate characters from a string.

    • Use recursion to check if the current character is the same as the next character, if so, skip the next character

    • Base case: if the string is empty or has only one character, return the string

    • Recursive case: if the current character is the same as the next character, call the function recursively with the string excluding the next character

  • Answered by AI
Round 2 - Face to Face 

(1 Question)

Round duration - 90 minutes
Round difficulty - Easy

  • Q1. 

    Reverse String Operations Problem Statement

    You are provided with a string S and an array of integers A of size M. Your task is to perform M operations on the string as specified by the indices in array A...

  • Ans. 

    Perform a series of reverse string operations on a given string based on specified indices.

    • Iterate through the array of indices and reverse the substring of the string based on the given indices.

    • Ensure to reverse the substring from the starting index to len(S) - starting index - 1.

    • Continue the operations in the sequence specified by the array of indices to get the final string.

  • Answered by AI
Round 3 - HR 

Round duration - 50 minutes
Round difficulty - Medium

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 2 in BangaloreEligibility criteria60%Tech Mahindra interview preparation:Topics to prepare for the interview - Java, Data Structures, Oops Concept, Angular, Basic fundamental of Computer ScienceTime required to prepare for the interview - 3 monthsInterview preparation tips for other job seekers

Tip 1 : Prepare well for resume & confidence for basic part of CS.
Tip 2 : Good knowledge of skills set which mentioned in CV.
Tip 3 : Explain about projects which you have worked earlier & your roles and responsibilities.

Application resume tips for other job seekers

Tip 1 : Mentioned all the skills & certificate till date update your resume every 3 month's. 
Tip 2 : Proper skills set with project explanation and duration of project which you have worked on

Final outcome of the interviewSelected

Skills evaluated in this interview

SDE-2 Interview Questions & Answers

Genpact user image Anonymous

posted on 17 May 2022

I was interviewed before May 2021.

Round 1 - Coding Test 

(1 Question)

Round duration - 60 minutes
Round difficulty - Easy

It is online round and it was conducted around 11 AM on campus. Difficulty was medium. 2 coding questions were asked. One question is based on arrays(easy) and the other question is based on usage of oops concepts like Inheritance, polymorphism. Everything went smooth.

  • Q1. 

    Subarray With Given Sum Problem Statement

    Given an array ARR of N integers and an integer S, determine if there exists a contiguous subarray within the array with a sum equal to S. If such a subarray exis...

  • Ans. 

    Given an array of integers, find a subarray with a given sum S.

    • Use a sliding window approach to find the subarray with the given sum.

    • Keep track of the current sum and adjust the window based on the sum.

    • Return the start and end indices of the subarray if found, otherwise return [-1, -1].

  • Answered by AI
Round 2 - Video Call 

(4 Questions)

Round duration - 50 minutes
Round difficulty - Medium

Round started with self introduction and discussion of project. Everything went fine.
Note: we didn't have hr round due to time constraint. You can expect hr round.

  • Q1. 

    Find the Duplicate Number Problem Statement

    Given an integer array 'ARR' of size 'N' containing numbers from 0 to (N - 2). Each number appears at least once, and there is one number that appears twice. Yo...

  • Ans. 

    Find the duplicate number in an array of integers from 0 to (N-2).

    • Iterate through the array and keep track of the frequency of each number using a hashmap.

    • Return the number with a frequency greater than 1 as the duplicate number.

  • Answered by AI
  • Q2. Can you explain the concept of normalization and its types?
  • Ans. 

    Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.

    • Normalization is used to eliminate data redundancy and ensure data integrity in a database.

    • There are different normal forms such as 1NF, 2NF, 3NF, BCNF, and 4NF.

    • Each normal form has specific rules that must be followed to ensure data is properly organized.

    • Normalization helps in reducing data anomalies and incon...

  • Answered by AI
  • Q3. Can you explain the ACID properties in the context of database management systems?
  • Ans. 

    ACID properties are essential characteristics of a transaction in a database management system.

    • Atomicity ensures that either all operations in a transaction are completed successfully or none of them are.

    • Consistency ensures that the database remains in a valid state before and after the transaction.

    • Isolation ensures that the execution of multiple transactions concurrently does not interfere with each other.

    • Durability e...

  • Answered by AI
  • Q4. Can you explain the concepts of Object-Oriented Programming (OOP) with real-life examples?
  • Ans. 

    OOP is a programming paradigm based on the concept of objects, which can contain data and code to manipulate that data.

    • OOP focuses on creating objects that interact with each other to solve complex problems.

    • Encapsulation: Objects can hide their internal state and require interactions through well-defined interfaces. Example: A car object with methods like start(), stop(), accelerate().

    • Inheritance: Objects can inherit a...

  • Answered by AI

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 2 in BangaloreEligibility criteriaAbove 7cgpaGenpact interview preparation:Topics to prepare for the interview - Data Structures and Algorithms, Operating systems, DBMS, Computer Networks, OOPSTime required to prepare for the interview - 3 monthsInterview preparation tips for other job seekers

Tip 1 : Don't get frustrated if not selected, keep believing yourself.
Tip 2 : Prepare data structures and algorithms well. Practice coding daily. OOPS in any programming language will do. Prefer quality of codes to quantity.
Tip 3 : If possible do a project on full stack development.

Application resume tips for other job seekers

Tip 1 : Keep it simple and try to adjust everything in one page. As a fresher it is better if you can have 2 projects in your cv.
Tip 2 : Don't add unnecessary details such as parents details.

Final outcome of the interviewSelected

Skills evaluated in this interview

SDE-2 Interview Questions & Answers

TCS user image Anonymous

posted on 16 Sep 2021

I was interviewed in Dec 2020.

Round 1 - Coding Test 

(1 Question)

Round duration - 30 minutes
Round difficulty - Medium

It was in the morning about 10:00AM-10:40AM. The platform used for this round was hackerrank. There are 15 MCQ's which cover portions of Aptitude, Data Structures, DBMS, SQL

  • Q1. 

    Minimum Operations Problem Statement

    You are given an array 'ARR' of size 'N' consisting of positive integers. Your task is to determine the minimum number of operations required to make all elements in t...

  • Ans. 

    Minimum number of operations to make all elements in the array equal by performing addition, subtraction, multiplication, or division.

    • Iterate through the array to find the maximum and minimum values.

    • Calculate the difference between the maximum and minimum values.

    • The minimum number of operations needed is the difference between the maximum and minimum values.

  • Answered by AI
Round 2 - HR 

Round duration - 15 minutes
Round difficulty - Easy

It was in the night around 7:00PM-7:20PM. Platform used for this round was skype. Interviewer was very serious while taking my interview.

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 2 in DelhiEligibility criteriaAbove 7 CGPATata Consultancy Services (TCS) interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, OOPS, Data Science, Aptitude, DBMSTime required to prepare for the interview - 3.5 monthsInterview preparation tips for other job seekers

Tip 1 : Practice as much as you can
Tip 2 : Try to get a good hold in Data Structures
Tip 3 : Do atleast 2 projects

Application resume tips for other job seekers

Tip 1 : It should not be too long or too short.
Tip 2 : Each skill should be mentioned properly.

Final outcome of the interviewSelected

SDE-2 Interview Questions & Answers

TCS user image Anonymous

posted on 16 Sep 2021

I was interviewed in Sep 2020.

Round 1 - Coding Test 

(1 Question)

Round duration - 180 minutes
Round difficulty - Hard

Timing: 8 a.m. to 11a.m.
Environment was optimum.
No significant activity.

  • Q1. 

    Edit Distance Problem Statement

    Given two strings S and T with lengths N and M respectively, your task is to find the "Edit Distance" between these strings.

    The Edit Distance is defined as the minimum nu...

  • Ans. 

    The task is to find the minimum number of operations required to convert one string into another using delete, replace, and insert operations.

    • Use dynamic programming to solve the problem efficiently.

    • Create a 2D array to store the minimum edit distance for substrings of the two input strings.

    • Iterate through the strings and update the array based on the operations needed for each character.

    • Return the value in the bottom ...

  • Answered by AI
Round 2 - Video Call 

Round duration - 30 minutes
Round difficulty - Medium

Timing: 12:00 p.m. to 12:30 p.m.
The environment was quite good.
No significant activity.
Interviewers were very friendly. They were behaving like friends.

Round 3 - HR 

Round duration - 15 minutes
Round difficulty - Easy

Timing: 3:00 p.m. to 3:20 p.m.
Environment was very good.
No significant activity was monitored.
HR was very good and friendly.

Interview Preparation Tips

Professional and academic backgroundI completed Civil Engineering from Heritage Institute of Technology. I applied for the job as SDE - 2 in KolkataEligibility criteriaAbove 6.5 CGPATata Consultancy Services (TCS) interview preparation:Topics to prepare for the interview - Data Structures, Dynamic Programming, OOPS, Computer Networks, System DesignTime required to prepare for the interview - 7 monthsInterview preparation tips for other job seekers

Tip 1 : Do minimum 3 projects
Tip 2 : Prepare every topic of DSA for interview
Tip 3 : Hands on experience in performing MySql commands

Application resume tips for other job seekers

Tip 1 : Be precise and don't bluff
Tip 2 : Learn atleast 2 programming languages
Tip 3 : Do projects on latest technologies like Artificial Intelligence and Machine Learning

Final outcome of the interviewSelected

Skills evaluated in this interview

SDE-2 Interview Questions & Answers

TCS user image Anonymous

posted on 15 Sep 2021

I was interviewed before Sep 2020.

Round 1 - Coding Test 

(1 Question)

Round duration - 360 minutes
Round difficulty - Hard

Timing- Any 6 hours of my choice in the 24 hour window. (10:00 p.m. to 4:00 a.m. I selected)
Environment was very friendly and easy to use.
No significant activity.
This was the only coding round.

  • Q1. 

    Prime Time Again Problem Statement

    You are given two integers DAY_HOURS and PARTS. The integer 'DAY_HOURS' represents the number of hours in a day, and the day can be divided into 'PARTS' equal parts. You...

  • Ans. 

    Find total instances of equivalent prime groups in a day divided into equal parts.

    • Iterate through each part of the day and check for prime pairs in different parts

    • Use a helper function to check if a number is prime

    • Ensure the day is evenly divided by parts and each prime group has hours from different parts

  • Answered by AI
Round 2 - Telephonic Call 

Round duration - 10-15 minutes
Round difficulty - Easy

Timing- 12:15 p.m. 
Environment was very good .
Not any significant activity.
The interviewer was very friendly and talked like friends.

Round 3 - HR 

Round duration - 20 minutes
Round difficulty - Medium

Timing- 12:30 p.m. to 12:45 p.m
Environment was very comfortable.
No other significant activity.
Interviewer was very good and talking very politely & friendly.

Interview Preparation Tips

Professional and academic backgroundI completed Computer Science Engineering from D Y Patil School Of Engineering Academy,Ambi.. I applied for the job as SDE - 2 in PuneEligibility criteriaAbove 6.75 CGPA, No running backlogsTata Consultancy Services (TCS) interview preparation:Topics to prepare for the interview - DBMS, Sorting Algorithms, SDLC, Computer Networks, Basics of DSATime required to prepare for the interview - 2 monthsInterview preparation tips for other job seekers

Tip 1 : Make sure what you have learnt in DSA you can do it practically by writing codes.
Tip 2 : Must have a hands-on experience in writing SQL commands.
Tip 3 : Do atleast 3-4 projects so that you have an option to explain any one of them if the interviewer asks.

Application resume tips for other job seekers

Tip 1 : Write only true data in resume. Don't bluff as you may get caught which will be very embarrassing.
Tip 2 : Have some latest technology related projects in your resume.

Final outcome of the interviewSelected

Skills evaluated in this interview

I was interviewed before May 2016.

Interview Questionnaire 

7 Questions

  • Q1. Tell me about yourself​
  • Ans. 

    I am a technical support executive with experience in troubleshooting software and hardware issues.

    • Experienced in resolving customer queries and providing technical assistance

    • Proficient in diagnosing and troubleshooting software and hardware problems

    • Skilled in communicating complex technical concepts to non-technical users

    • Familiar with various operating systems and software applications

    • Ability to work under pressure an

  • Answered by AI
  • Q2. Why do you want to work here
  • Ans. 

    I want to work here because of the company's reputation, growth opportunities, and alignment with my skills and interests.

    • Company's reputation: I have heard great things about the company's commitment to customer satisfaction and quality service.

    • Growth opportunities: I am impressed by the company's focus on employee development and advancement.

    • Alignment with skills and interests: I have a passion for technical support ...

  • Answered by AI
  • Q3. Why did you leave your previous job
  • Ans. 

    Seeking better growth opportunities and a more challenging role.

    • Limited growth opportunities in previous job

    • Looking for a more challenging role to enhance skills

    • Seeking a company with better work culture and values

    • Relocated to a different city or country

    • Company downsizing or restructuring

  • Answered by AI
  • Q4. Difference between various operating systems.
  • Ans. 

    Operating systems differ in their user interface, functionality, and compatibility with hardware and software.

    • Windows is the most widely used OS, known for its user-friendly interface and compatibility with most software.

    • MacOS is known for its sleek design and compatibility with Apple hardware and software.

    • Linux is an open-source OS with various distributions, known for its customization and security features.

    • Android i...

  • Answered by AI
  • Q5. Latest versions of the product
  • Ans. 

    The latest versions of the product are 3.0 for desktop and 2.5 for mobile.

    • Desktop version: 3.0

    • Mobile version: 2.5

  • Answered by AI
  • Q6. Information about the company (process)
  • Q7. Questions related to previous work experience

Interview Preparation Tips

Round: HR Interview
Experience: The HR took me in a cabin, with my CV in her hand. She asked me these questions and a few others. I answered them and then she asked me to wait for the technical interview in the lobby.
Tips: Rehearse your answers well in advance. Look presentable and show confidence.

Round: Technical Interview
Experience: The Operations Manager conducted this interview. He asked the questions mentioned above and also asked my expectations from the company, financially and otherwise.
Tips: Prepare the technical part well and if you don't know, don't guess. Be honest.

Round: Test
Experience: Two assessments. Technical is all objective. Grammar assessment includes a few descriptive questions.
Tips: You can prepare in advance even though the questions are not very tough. Even the organisation is not very serious about these tests, so you can use your phone during the tests to find answers online.
Duration: 1 hour
Total Questions: 40

Round: Typing test
Experience: Typing test in which your typing speed must be 35 words per minute and you need to maintain accuracy of 90% or more. Test duration 2 minutes.
Tips: Practice before. Don't panic. Maintaining speed is easy, focus more on accuracy. They let you try a few times until you pass. So, not much to worry about.

Skills: Communication And Confidence, Product Sense, Patience, Stability

Skills evaluated in this interview

Interview Preparation Tips

Round: Resume Shortlist
Experience: I got a call from Teleperformance HR and was asked if interested to work in BPO. I agreed and they took my short introduction. After that, I was informed that next level interview will be conducted within 1 to 2 working days.
Tips: What ever you say, say with 100% confidence.

Interview Questionnaire 

1 Question

  • Q1. Basic questions like Name, Address, Birth date, qualification and work experience

Interview Preparation Tips

Round: V&A
Experience: Yes, i was fail in this round as i was not able to speak on call. i was understanding the question but was unable to answer.

Round: Manager round
Experience: Asked about me and then made some common questions that are often asks in interviews.


Interview Questionnaire 

1 Question

  • Q1. About yourself

Interview Preparation Tips

Round: HR Interview
Experience: Self introduction and about previous experience.
Tips: Should be confidence

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