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Epsilon Interview Questions and Answers

Updated 17 Apr 2025
Popular Designations

46 Interview questions

A Support Engineer was asked 2mo ago
Q. Explain 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 ...

View all Support Engineer interview questions
A Lead Software Engineer was asked 8mo ago
Q. Write a program to print odd and even numbers using multithreading.
Ans. 

Program to print odd and even numbers using multithreading

  • Create two separate threads for printing odd and even numbers

  • Use synchronization mechanisms like mutex or semaphore to ensure proper ordering of output

  • Example: Thread 1 prints odd numbers (1, 3, 5, ...) and Thread 2 prints even numbers (2, 4, 6, ...)

View all Lead Software Engineer interview questions
A Lead Software Engineer was asked 10mo ago
Q. Describe the design of a rate limiter.
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 mess...

View all Lead Software Engineer interview questions
An Associate Marketing Business Analyst was asked 10mo ago
Q. Write SQL queries to manipulate strings.
Ans. 

SQL queries of Strings

  • Use the LIKE operator to search for a specified pattern in a column

  • Use the CONCAT function to concatenate strings

  • Use the SUBSTRING function to extract a substring from a string

An Associate Marketing Business Analyst was asked 10mo ago
Q. What are your areas of interest?
Ans. 

My interest areas include data analysis, market research, and digital marketing.

  • Data analysis

  • Market research

  • Digital marketing

A Software Engineer Level 1 was asked 11mo ago
Q. Write an SQL query to find the second largest number from a database.
Ans. 

Use a subquery to find the 2nd largest number in a database table.

  • Use a subquery to select all distinct numbers from the table

  • Order the numbers in descending order

  • Use LIMIT 1,1 to select the second row which will be the 2nd largest number

View all Software Engineer Level 1 interview questions
A Software Engineer Level 1 was asked 11mo ago
Q. Write a program to check if a given string can become a palindrome if letters are re-arranged.
Ans. 

Program to check if a string can be rearranged to form a palindrome

  • Create a frequency map of characters in the string

  • Count the number of characters with odd frequencies

  • If there is at most one character with odd frequency, the string can be rearranged to form a palindrome

View all Software Engineer Level 1 interview questions
Are these interview questions helpful?
A Software Engineer Level 1 was asked 11mo ago
Q. What is the diamond problem in Java?
Ans. 

Diamond problem in Java occurs when a class inherits from two classes that have a common ancestor, resulting in ambiguity.

  • Occurs in multiple inheritance when a class inherits from two classes that have a common ancestor

  • Results in ambiguity as the compiler cannot determine which method to call

  • Can be resolved using interfaces or by explicitly overriding methods

View all Software Engineer Level 1 interview questions
A Software Engineer Level 1 was asked 11mo ago
Q. What are the different data types in Python?
Ans. 

Python supports various data types including integers, floats, strings, lists, tuples, dictionaries, and more.

  • Integers: whole numbers without decimal points (e.g. 5, -3)

  • Floats: numbers with decimal points (e.g. 3.14, -0.5)

  • Strings: sequences of characters enclosed in quotes (e.g. 'hello', '123')

  • Lists: ordered collections of items (e.g. [1, 'apple', True])

  • Tuples: ordered, immutable collections of items (e.g. (1, 'ba...

View all Software Engineer Level 1 interview questions
A Software Engineer Level 1 was asked 11mo ago
Q. What are the differences between Java and Python?
Ans. 

Java is statically typed, object-oriented language with a focus on performance and scalability. Python is dynamically typed, high-level language known for its simplicity and readability.

  • Java is statically typed, meaning variable types are explicitly declared at compile time. Python is dynamically typed, allowing for more flexibility but potentially leading to runtime errors.

  • Java is more verbose and requires more b...

View all Software Engineer Level 1 interview questions

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
1w
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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