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HCLTech Software Engineer Interview Questions and Answers

Updated 5 Jul 2025

196 Interview questions

A Software Engineer was asked
Q. Explain the principles of OOPS.
Ans. 

Explanation of OOP principles

  • OOP stands for Object-Oriented Programming

  • It emphasizes on objects and classes

  • Encapsulation, Inheritance, and Polymorphism are the three main principles of OOP

  • Encapsulation is the process of hiding data and methods within a class

  • Inheritance allows a class to inherit properties and methods from another class

  • Polymorphism allows objects to take on multiple forms or behaviors

A Software Engineer was asked
Q. Given a position, write code to delete a node in a linked list.
Ans. 

Code to delete a node from a given position

  • Identify the node to be deleted and its previous node

  • Update the previous node's next pointer to skip the node to be deleted

  • Free the memory occupied by the node to be deleted

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A Software Engineer was asked
Q. What is a singleton class in Java?
Ans. 

Singleton class is a class that can have only one instance and provides a global point of access to it.

  • Singleton class is used when we need to ensure that only one instance of a class is created throughout the application.

  • It is implemented by making the constructor private and providing a static method to get the instance of the class.

  • Example: java.lang.Runtime is a singleton class that provides access to the runt...

A Software Engineer was asked
Q. How do we make a class immutable in Java?
Ans. 

To make a class immutable in Java, we need to follow certain rules.

  • Make the class final so that it cannot be extended

  • Make all the fields private and final

  • Do not provide any setter methods

  • If the class has mutable fields, return a copy of the field instead of the original in getter methods

  • Ensure that any mutable objects passed to the constructor are not modified outside the class

  • Override equals() and hashCode() meth...

What people are saying about HCLTech

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carefulmatcha
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2w
works at
Cognizant
DXC or HCL for Mainframe Dev? Help me decide!
Hey everyone 👋 I’m at a crossroads with offers from HCLTech and DXC for a Mainframe Developer role. I’ve got 3.7 years in COBOL, DB2, JCL, VSAM, and IMS, and I’m aiming for technical growth, solid projects, and leadership potential. 👉 I want to sharpen my IMS and VSAM skills, build a strong career, and move into tech leadership. If you’re at either company (especially in mainframe), your insights would be awesome! Which place is best for learning, recognition, and long-term stability? Thanks a bunch! 🙏
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A Software Engineer was asked
Q. Explain call by reference with an example.
Ans. 

Call by reference is a method of passing arguments to a function by reference.

  • In call by reference, the memory address of the variable is passed to the function.

  • Any changes made to the parameter inside the function will reflect in the original variable.

  • Example: void swap(int *a, int *b) { int temp = *a; *a = *b; *b = temp; }

  • Example: int main() { int x = 10, y = 20; swap(&x, &y); // x = 20, y = 10 }

A Software Engineer was asked
Q. Given two numbers from a Pythagorean triplet, find the third number.
Ans. 

To find the third number in a Pythagorean triplet given two numbers.

  • Use the Pythagorean theorem (a^2 + b^2 = c^2) to solve for the missing number.

  • Check if the given numbers form a Pythagorean triplet before proceeding.

  • The third number can be either a or b depending on which two numbers are given.

A Software Engineer was asked
Q. What is the difference between PUT and PATCH requests?
Ans. 

PUT updates or replaces an entire resource, while PATCH updates only the specified fields.

  • PUT is idempotent, while PATCH is not

  • PUT requires the entire resource to be sent, while PATCH only requires the updated fields

  • PUT replaces the entire resource, while PATCH modifies only the specified fields

  • PUT is used to create a new resource if it doesn't exist, while PATCH is not

  • Example: PUT /users/1 replaces the entire use...

Are these interview questions helpful?
A Software Engineer was asked
Q. What are the differences between a HashMap and a HashSet?
Ans. 

Hashmap is a key-value pair data structure while Hashset is a collection of unique elements.

  • Hashmap allows duplicate values but not duplicate keys while Hashset only allows unique elements.

  • Hashmap is implemented using a combination of hash table and linked list while Hashset is implemented using only hash table.

  • Hashmap is used to store data in key-value pairs while Hashset is used to store a set of unique elements...

A Software Engineer was asked
Q. What are the advantages of using stored procedures?
Ans. 

Stored procedures provide faster execution, improved security, and easier maintenance.

  • Stored procedures reduce network traffic by executing on the server.

  • They can be pre-compiled for faster execution.

  • They provide better security by allowing access only through the procedure.

  • They simplify maintenance by centralizing code.

  • They can be reused across multiple applications.

  • They can improve performance by reducing the am...

A Software Engineer was asked
Q. Write a C program to handle fractional numbers.
Ans. 

A C program to perform arithmetic operations on fractional numbers.

  • Use float or double data type to store fractional numbers.

  • Use scanf() to take input from the user.

  • Perform arithmetic operations like addition, subtraction, multiplication, and division.

  • Use printf() to display the result.

HCLTech Software Engineer Interview Experiences

324 interviews found

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
4-6 weeks
Result
Selected Selected
Round 1 - Technical 

(2 Questions)

  • Q1. Technical questions regarding Salesforce
  • Q2. Technical questions regarding Salesforce
Round 2 - HR 

(2 Questions)

  • Q1. Salary discussion
  • Q2. Salary discussion

Interview Preparation Tips

Interview preparation tips for other job seekers - No hike in HCL in all fiscal year
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Approached by Company and was interviewed in Oct 2024. There was 1 interview round.

Round 1 - Technical 

(3 Questions)

  • Q1. 1) OOPS in java, and told to explain abstraction, encapsulation, inheritance with practical code 2) Exception handling(globally), Authentication and authorization 3) SOLID principles and factory design pat...
  • Ans. 

    Interview questions for Software Engineer position covering OOPS concepts, exception handling, SOLID principles, Java 8 features, and Streams.

    • Abstraction in OOPS: Hiding implementation details. Example: Abstract class Shape with method draw().

    • Encapsulation in OOPS: Bundling data and methods that operate on the data. Example: Class Employee with private fields and public getters/setters.

    • Inheritance in OOPS: Reusing code...

  • Answered by AI
  • Q2. 1) Advantage of springboot over spring 2) Tell me all the anotations you know in spring 3) What are CRUD operations, write controller layer and use validating annotations like @NotNull, @valid etc. how to ...
  • Ans. 

    The interview questions cover various topics related to Spring framework, REST vs SOAP, JPA repository, Feign client, circuit breaker, and Spring Security.

    • Spring Boot provides a simpler and faster way to set up and run Spring applications compared to traditional Spring.

    • Common annotations in Spring include @Controller, @Service, @Repository, @Autowired, @Component, @RequestMapping, @GetMapping, @PostMapping, @PutMapping...

  • Answered by AI
  • Q3. 1) ACID properties 2) DBMS commands 3) inner queries 4) Joins 5) S3 bucket congif and how to handle file and upload and retrieve in s3 6) Ci/Cd basic flow and docker explaination

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare resume well and keep applying to jobs

Skills evaluated in this interview

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

I applied via Approached by Company and was interviewed in Dec 2024. There were 2 interview rounds.

Round 1 - Technical 

(3 Questions)

  • Q1. Java Question spring boot question
  • Q2. Spring Aop, rest api
  • Q3. Spring security
Round 2 - HR 

(1 Question)

  • Q1. Salary discussion,why tou want to join
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(3 Questions)

  • Q1. What is java and explain java features
  • Ans. 

    Java is a popular programming language known for its platform independence and object-oriented features.

    • Java is platform-independent, meaning it can run on any device with a Java Virtual Machine (JVM)

    • Java is object-oriented, allowing for modular and reusable code

    • Java is known for its robust standard library, providing a wide range of pre-built functionality

    • Java supports multithreading, allowing for concurrent execution...

  • Answered by AI
  • Q2. What is multithreading
  • Q3. What is collection in java
Round 2 - HR 

(3 Questions)

  • Q1. Tell me about yourself
  • Q2. Current salary
  • Ans. 

    I prefer to focus on the value I can bring to the company rather than my current salary.

    • Emphasize your skills, experience, and qualifications instead of focusing on current salary

    • Discuss how your salary expectations align with the market rate for the position

    • Avoid disclosing specific salary figures unless necessary

  • Answered by AI
  • Q3. Expected salary
Interview experience
5
Excellent
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Selected Selected

I appeared for an interview in May 2025, where I was asked the following questions.

  • Q1. Work Experience and work details?
  • Ans. 

    I have over 5 years of experience in software development, focusing on web applications and cloud solutions.

    • Developed a scalable e-commerce platform using React and Node.js, improving load times by 30%.

    • Led a team of 4 in migrating legacy systems to AWS, resulting in a 40% reduction in operational costs.

    • Implemented CI/CD pipelines using Jenkins, which decreased deployment times from hours to minutes.

    • Collaborated with cr...

  • Answered by AI
  • Q2. Related to work
  • Q3. Difference between the manual and automation Testing?
  • Ans. 

    Manual testing involves human testers executing test cases, while automation testing uses tools to execute tests automatically.

    • Manual testing is time-consuming and requires human intervention, e.g., exploratory testing.

    • Automation testing is faster and more efficient for repetitive tasks, e.g., regression testing.

    • Manual testing is better for usability testing, where human judgment is crucial.

    • Automation testing is ideal ...

  • Answered by AI
  • Q4. What is the functional Testing?
  • Ans. 

    Functional testing verifies that software functions according to specified requirements and performs its intended tasks.

    • Focuses on user requirements and functionality of the application.

    • Examples include testing login/logout features, data entry forms, and payment processing.

    • Can be performed manually or through automated testing tools.

    • Ensures that the software behaves as expected under various conditions.

    • Common techniqu...

  • Answered by AI
  • Q5. Difference Between Black Box and white Box Testing?

Interview Preparation Tips

Interview preparation tips for other job seekers - Fast Process.
Interview experience
3
Average
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Not Selected

I appeared for an interview in Apr 2025, where I was asked the following questions.

  • Q1. Can you explain the different between a stack and queue?
  • Ans. 

    A stack is a LIFO data structure, while a queue is a FIFO structure, each serving different use cases in programming.

    • LIFO vs FIFO: Stack follows Last In First Out (LIFO) principle, while Queue follows First In First Out (FIFO).

    • Stack Example: Think of a stack of plates; you add and remove plates from the top.

    • Queue Example: A queue is like a line at a ticket counter; the first person in line is the first to be served.

    • Ope...

  • Answered by AI
  • Q2. What are the different between threads and process?
  • Ans. 

    Threads are lightweight processes that share the same memory space, while processes are independent with their own memory allocation.

    • Memory Usage: Threads share the same memory space, making them more efficient in terms of memory usage compared to processes, which have separate memory.

    • Communication: Threads can communicate with each other more easily since they share the same memory, while processes require inter-proce...

  • Answered by AI
  • Q3. Tell me about the challenging technical problem you faced and how it was solved?
  • Ans. 

    I faced a significant challenge with a performance bottleneck in a web application, which I resolved through optimization techniques.

    • Identifying the Bottleneck: I used profiling tools to analyze the application and discovered that a specific API call was taking too long to respond.

    • Caching Strategy: Implemented a caching mechanism using Redis to store frequently accessed data, reducing the number of API calls and improv...

  • Answered by AI
  • Q4. Can you discuss a project you worked on that you are particularly proud of?
  • Q5. What instructs you about working at our company
  • Ans. 

    Working at your company offers a collaborative environment, innovative projects, and opportunities for professional growth.

    • Collaborative Culture: The company promotes teamwork, where developers regularly engage in code reviews and pair programming to enhance code quality.

    • Innovative Projects: Employees work on cutting-edge technologies, such as AI and machine learning, which keeps the work exciting and relevant.

    • Professi...

  • Answered by AI
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Explain about Python OOps?
  • Q2. Explain about Django MVC architechture?
  • Ans. 

    Django follows the Model-View-Controller (MVC) architecture pattern for organizing code.

    • Model: Represents the data structure and handles database operations.

    • View: Handles user interface logic and renders templates.

    • Controller: Acts as a bridge between the Model and View, processing user requests and returning responses.

  • Answered by AI

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
Easy
Process Duration
2-4 weeks
Result
-

I applied via Company Website

Round 1 - One-on-one 

(1 Question)

  • Q1. Shall we connect tomorrow
Round 2 - Technical 

(1 Question)

  • Q1. Shall we connect this week
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
No response

I applied via Naukri.com and was interviewed in Jul 2024. There were 2 interview rounds.

Round 1 - Coding Test 

HTML, CSS, JavaScript, mongoDb nodeJs reactjs

Round 2 - Technical 

(5 Questions)

  • Q1. Software development
  • Q2. Web development
  • Q3. Technical support
  • Q4. Hardware support
  • Q5. Financial services

Interview Preparation Tips

Interview preparation tips for other job seekers - Please I select in company and one time give a offer of interview
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I appeared for an interview in Feb 2025, where I was asked the following questions.

  • Q1. Tell. Me. about your. self
  • Q2. Why. should. we. choose you
  • Q3. Why. did. You. leave your.. last. Job
  • Ans. 

    I left my last job to seek new challenges, enhance my skills, and pursue opportunities that align with my career goals.

    • I wanted to grow professionally and felt I had reached a plateau in my previous role.

    • I was looking for a company culture that aligns more closely with my values, such as innovation and collaboration.

    • I sought opportunities to work on more complex projects that would allow me to leverage my technical ski...

  • Answered by AI
  • Q4. What. are. your. strengths. and. waakensses
  • Q5. What. are. You. goals
  • Q6. What. are. you. salary. experience

Interview Preparation Tips

Interview preparation tips for other job seekers - Speaking slowly and clearly can. helf. You.. appecer relaked and confident

HCLTech Interview FAQs

How many rounds are there in HCLTech Software Engineer interview?
HCLTech interview process usually has 2-3 rounds. The most common rounds in the HCLTech interview process are Technical, HR and Coding Test.
How to prepare for HCLTech Software Engineer 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 HCLTech. The most common topics and skills that interviewers at HCLTech expect are Software Engineering, C++, Java, Oracle and PLSQL.
What are the top questions asked in HCLTech Software Engineer interview?

Some of the top questions asked at the HCLTech Software Engineer interview -

  1. Why you choose Machine Learning (during Workshop...read more
  2. what's difference between server.transfer and Response.redir...read more
  3. What is final keyword? Differentiate between final and stat...read more
What are the most common questions asked in HCLTech Software Engineer HR round?

The most common HR questions asked in HCLTech Software Engineer interview are -

  1. What are your strengths and weakness...read more
  2. Where do you see yourself in 5 yea...read more
  3. Why are you looking for a chan...read more
How long is the HCLTech Software Engineer interview process?

The duration of HCLTech Software Engineer interview process can vary, but typically it takes about less than 2 weeks to complete.

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Overall Interview Experience Rating

4/5

based on 229 interview experiences

Difficulty level

Easy 26%
Moderate 68%
Hard 5%

Duration

Less than 2 weeks 66%
2-4 weeks 19%
4-6 weeks 6%
6-8 weeks 6%
More than 8 weeks 2%
View more
HCLTech Software Engineer Salary
based on 24.9k salaries
₹2.7 L/yr - ₹8 L/yr
47% less than the average Software Engineer Salary in India
View more details

HCLTech Software Engineer Reviews and Ratings

based on 2.5k reviews

3.7/5

Rating in categories

3.5

Skill development

3.8

Work-life balance

2.9

Salary

3.8

Job security

3.7

Company culture

2.8

Promotions

3.4

Work satisfaction

Explore 2.5k Reviews and Ratings
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