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Epsilon Interview Questions and Answers

Updated 17 Apr 2025
Popular Designations

50 Interview questions

A Lead Software Engineer was asked
Q. What is lazy loading?
Ans. 

Lazy loading is a technique used to defer the loading of non-critical resources until they are actually needed.

  • It improves page load time and performance.

  • It reduces the initial load time of a web page.

  • It is commonly used for images, videos, and other media files.

  • It can be implemented using JavaScript or server-side scripting.

  • Example: Images below the fold on a webpage are loaded only when the user scrolls down to ...

View all Lead Software Engineer interview questions
A Lead Software Engineer was asked
Q. What are AJAX calls?
Ans. 

Ajax calls are asynchronous HTTP requests made by JavaScript to a server without reloading the page.

  • Ajax stands for Asynchronous JavaScript and XML

  • Used to update parts of a web page without reloading the entire page

  • Can be used to fetch data from a server and display it on a web page

  • Examples: Google Maps, Facebook News Feed

View all Lead Software Engineer interview questions
A Business System Analyst was asked
Q. What CSR activities have you done so far?
Ans. 

I have volunteered for various CSR activities such as beach cleanups, blood donation drives, and fundraising for charity organizations.

  • Volunteered for beach cleanups organized by local NGOs

  • Participated in blood donation drives organized by hospitals

  • Raised funds for charity organizations through social media campaigns

  • Mentored underprivileged children in a local school

  • Organized a food donation drive for homeless peo...

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A Business System Analyst was asked
Q. How will you manage priority tasks when overloaded with work?
Ans. 

I will prioritize tasks based on their urgency and impact, delegate if possible, and communicate with stakeholders.

  • Assess the urgency and impact of each task

  • Delegate tasks to team members if appropriate

  • Communicate with stakeholders to manage expectations

  • Use time management techniques to optimize productivity

  • Seek assistance or support from colleagues if needed

View all Business System Analyst interview questions
A Senior Manager was asked
Q. How do you handle conflict between resources?
Ans. 

I encourage open communication and collaboration to resolve conflicts and find mutually beneficial solutions.

  • Encourage open communication and active listening

  • Identify the root cause of the conflict

  • Brainstorm potential solutions together

  • Find a mutually beneficial solution

  • Document the resolution and follow up to ensure success

View all Senior Manager interview questions
A Lead Developer was asked
Q. What is the life cycle of an MVC application?
Ans. 

The life cycle of an MVC application involves the stages of initialization, request processing, rendering, and disposal.

  • Initialization: Application starts, routes are configured, and controllers and views are initialized.

  • Request processing: User sends a request, which is routed to the appropriate controller. Controller processes the request and interacts with the model and view.

  • Rendering: Controller passes data to...

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A Lead Developer was asked
Q. What are filters in MVC, and can you provide an example of their usage?
Ans. 

Filters in MVC are used to intercept and modify incoming requests or outgoing responses.

  • Filters can be used to implement authentication and authorization.

  • They can be used to handle exception and error logging.

  • Filters can be used to modify the response before it is sent to the client.

  • They can be used to implement caching and performance optimizations.

  • Filters can be applied globally or to specific controllers or act...

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Are these interview questions helpful?
A Lead Developer was asked
Q. What are the usage and importance of Abstract classes and Interfaces?
Ans. 

Abstract and Interface are important concepts in object-oriented programming.

  • Abstract classes provide a way to define common behavior for a group of classes.

  • Interfaces define a contract that classes must adhere to.

  • Abstract classes can have both abstract and non-abstract methods.

  • Interfaces can only have abstract methods and constants.

  • Classes can implement multiple interfaces but can only inherit from one abstract c...

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A Lead Software Engineer was asked
Q. What is a Factory design pattern? How do you implement that?
Ans. 

Factory design pattern is a creational pattern that provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created.

  • Factory pattern is used when we have a superclass with multiple subclasses and based on input, we need to return one of the subclass.

  • It provides a way to delegate the instantiation logic to child classes.

  • Example: java.util.Calendar, ...

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A Lead Software Engineer was asked
Q. What is the CORS issue? Where does it occur?
Ans. 

CORS (Cross-Origin Resource Sharing) is a security feature that restricts web pages from making requests to a different domain.

  • CORS issue occurs when a web page tries to access resources from a different domain

  • It is a security feature implemented by web browsers to prevent cross-site scripting attacks

  • CORS issue can be resolved by configuring the server to allow cross-origin requests or by using JSONP

  • It can occur i...

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Epsilon Interview Experiences

93 interviews found

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - One-on-one 

(1 Question)

  • Q1. Phone interview
Round 2 - Technical 

(1 Question)

  • Q1. Project technical questions
Round 3 - Technical 

(1 Question)

  • Q1. Project technical based question
Round 4 - HR 

(1 Question)

  • Q1. Behavioural based questions

Interview Questions & Answers

user image AARTI SHARMA

posted on 22 Jul 2024

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
More than 8 weeks
Result
Not Selected

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

Round 1 - Technical 

(9 Questions)

  • Q1. Some resume based questions( on projects and related technologies you've mentioned)
  • Q2. What is primary key and diff between primary key and unique?
  • Q3. How many types of joins are there? and asked to write a sql query based on joins.
  • Q4. What are get and put api calls?
  • Q5. Mention your current role.
  • Q6. How many null values a unique key can have?
  • Q7. What is cascade in sql and why we use it?
  • Q8. How to display last row in database?
  • Q9. SQL Query- Two tables employee and salary are given . Take out all the employees who are getting salary between 10K and 30K.
Round 2 - Behavioral 

(4 Questions)

  • Q1. Intro and some questions from intro itself.
  • Q2. HTML, It's structure,class, id, tags, attributes, whitespace, entities in html, limitations of html(everything about html)
  • Q3. Can we create a web page within a web page?
  • Q4. What do you know about Epsilon?

Interview Preparation Tips

Topics to prepare for Epsilon interview:
  • SQL Queries
  • Joins
  • Constraints in SQL
Interview preparation tips for other job seekers - Be Confident, stand for whatever you are saying and be genuine and smart at the interview. Sometimes they just use lies to check your confidence.
At the end ask some questions related to the company.

Skills evaluated in this interview

Data Analyst Interview Questions & Answers

user image Anonymous

posted on 9 Nov 2024

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

(2 Questions)

  • Q1. Inorder, preorder , Postorder traversal of tree with full code
  • Ans. 

    Tree traversals are methods to visit all nodes in a binary tree in different orders: inorder, preorder, and postorder.

    • Inorder Traversal: Visit left subtree, root, then right subtree. Example: For tree 1,2,3, result is 2,1,3.

    • Preorder Traversal: Visit root, left subtree, then right subtree. Example: For tree 1,2,3, result is 1,2,3.

    • Postorder Traversal: Visit left subtree, right subtree, then root. Example: For tree 1,2,3,...

  • Answered by AI
  • Q2. Check valid anagram?

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Basic full stack related questions
  • Q2. Javascript related questions
Round 2 - One-on-one 

(2 Questions)

  • Q1. System design questions
  • Q2. Rate limit design
  • Ans. 

    Rate limit design involves setting limits on the number of requests a user can make within a certain time frame to prevent abuse or overload.

    • Consider the type of requests being made and the impact of rate limiting on user experience.

    • Implement rate limiting at different levels such as API endpoints, user accounts, or IP addresses.

    • Use tokens or tokens buckets to track and enforce rate limits.

    • Provide clear error messages ...

  • Answered by AI
Round 3 - HR 

(1 Question)

  • Q1. Salary and benefits discussion

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Not Selected

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

Round 1 - Aptitude Test 

On mettle platform was easy

Round 2 - One-on-one 

(2 Questions)

  • Q1. Tell me about urself, what interests you?
  • Ans. 

    I am a passionate Senior SDET Engineer with a strong interest in automation, quality assurance, and continuous improvement.

    • Experienced in designing and implementing automated testing frameworks

    • Skilled in identifying and resolving software defects

    • Passionate about staying up-to-date with the latest technologies and tools in the QA field

  • Answered by AI
  • Q2. Explain all projects in resume
  • Ans. 

    I have worked on various projects including test automation, performance testing, and CI/CD implementation.

    • Test automation project using Selenium and Java to automate regression tests for web applications

    • Performance testing project using JMeter to simulate load on a web application and identify bottlenecks

    • CI/CD implementation project using Jenkins to automate build, test, and deployment processes

  • Answered by AI

Business Analyst Interview Questions & Answers

user image Mayur Sharma

posted on 9 Oct 2024

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - One-on-one 

(2 Questions)

  • Q1. Where do see yourself in 5 years?
  • Ans. 

    In 5 years, I see myself as a senior business analyst leading a team and contributing to strategic decision-making.

    • Leading a team of analysts

    • Contributing to strategic decision-making

    • Continuing professional development and certifications

    • Possibly pursuing a management role

    • Enhancing industry knowledge and expertise

  • Answered by AI
  • Q2. Why Epsilon? And why are you leaving your current organisation?
  • Ans. 

    I am interested in Epsilon's innovative approach to data analytics and leaving my current organization for career growth opportunities.

    • Epsilon's reputation for cutting-edge data analytics solutions

    • Opportunity for career growth and development at Epsilon

    • Excited about working with a new team and learning new skills

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

(2 Questions)

  • Q1. Sql basics and its uses
  • Ans. 

    SQL is a programming language used for managing and querying relational databases.

    • SQL stands for Structured Query Language

    • It is used to retrieve, insert, update, and delete data in databases

    • Common SQL commands include SELECT, INSERT, UPDATE, DELETE

    • SQL is used in various database management systems like MySQL, Oracle, SQL Server

    • Example: SELECT * FROM customers WHERE city = 'New York';

  • Answered by AI
  • Q2. Unix all commands
Round 2 - One-on-one 

(2 Questions)

  • Q1. Hr asked about salary
  • Q2. Manager direct meet

Skills evaluated in this interview

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

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

  • Q1. Explain the ddl and dml commands
  • Ans. 

    DDL and DML are SQL commands for defining and manipulating database structures and data.

    • DDL (Data Definition Language) commands define database structures. Examples: CREATE, ALTER, DROP.

    • DML (Data Manipulation Language) commands manage data within those structures. Examples: SELECT, INSERT, UPDATE, DELETE.

    • DDL commands affect the schema, while DML commands affect the data stored in the schema.

    • Example of DDL: CREATE TABLE...

  • Answered by AI
  • Q2. Explain your previous work experience
  • Ans. 

    I have extensive experience in technical support, troubleshooting, and customer service across various industries.

    • Provided technical support for software applications, resolving issues for over 100 users daily.

    • Implemented a ticketing system that improved response time by 30%.

    • Conducted training sessions for new employees on troubleshooting techniques.

    • Collaborated with development teams to identify and resolve recurring ...

  • Answered by AI
Interview experience
2
Poor
Difficulty level
Moderate
Process Duration
4-6 weeks
Result
Selected Selected

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

  • Q1. Brd frd srs
  • Q2. Workflow sql api
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Sql and case study questions
  • Q2. Joins questions were asked

Top trending discussions

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Interview Tips & Stories
2w
toobluntforu
·
works at
Cvent
Can speak English, can’t deliver in interviews
I feel like I can't speak fluently during interviews. I do know english well and use it daily to communicate, but the moment I'm in an interview, I just get stuck. since it's not my first language, I struggle to express what I actually feel. I know the answer in my head, but I just can’t deliver it properly at that moment. Please guide me
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Epsilon Interview FAQs

How many rounds are there in Epsilon interview?
Epsilon interview process usually has 2-3 rounds. The most common rounds in the Epsilon interview process are Technical, One-on-one Round and HR.
How to prepare for Epsilon 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 Epsilon. The most common topics and skills that interviewers at Epsilon expect are SQL, Python, Javascript, Agile Coaching and Automation Testing.
What are the top questions asked in Epsilon interview?

Some of the top questions asked at the Epsilon interview -

  1. If we have 2 tables with the same schema, one table has indexes and the other d...read more
  2. 3. How will you manage the priority task when overloaded with wo...read more
  3. SQL Query- Two tables employee and salary are given . Take out all the employee...read more
How long is the Epsilon interview process?

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

Tell us how to improve this page.

Overall Interview Experience Rating

4.3/5

based on 71 interview experiences

Difficulty level

Easy 15%
Moderate 85%

Duration

Less than 2 weeks 75%
2-4 weeks 14%
4-6 weeks 11%
View more

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Epsilon Reviews and Ratings

based on 759 reviews

3.8/5

Rating in categories

3.5

Skill development

3.9

Work-life balance

3.6

Salary

3.7

Job security

3.9

Company culture

3.1

Promotions

3.5

Work satisfaction

Explore 759 Reviews and Ratings
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