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Epsilon Lead Developer Interview Questions, Process, and Tips

Updated 26 Jul 2017

Epsilon Lead Developer Interview Experiences

1 interview found

I appeared for an interview in Jul 2017.

Interview Questionnaire 

5 Questions

  • Q1. Usage and importance of Abstract and Interface
  • 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 class.

    • ...

  • Answered by AI
  • Q2. Life cycle of 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 the ...

  • Answered by AI
  • Q3. Indexers in SQL servers
  • Ans. 

    Indexers in SQL servers are database objects that improve query performance by allowing faster data retrieval.

    • Indexers are created on one or more columns of a table to speed up data retrieval operations.

    • They work by creating a separate data structure that holds a copy of a portion of the data, allowing for faster searching and sorting.

    • Indexers can be created on both clustered and non-clustered tables.

    • They can be create...

  • Answered by AI
  • Q4. Filters in MVC and sample 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 actions.

  • Answered by AI
  • Q5. WCF architecture

Interview Preparation Tips

Round: Technical Interview
Experience: I got the interview scheduled via a consulting firm. It was on a Saturday morning hours. I reached location at time. There were 25 candidates for my profile. The office interior was just out of this world. The lift system was the most technologically advanced system I had ever seen. First round was taken by a senior guy, who was very good in technology. Second round was managerial round, asked more questions on my last project architecture and why I chose the technical stack used in that project. Basically had to tell the significance of MVC, bootstrap and AngularJS. Last round was HR round and had basic HR questions.
Tips: Prepare well on OOPS thoroughly, advanced topics on MVC and basics of WCF and WebAPI.

Skills evaluated in this interview

Lead Developer Jobs at Epsilon

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Interview questions from similar companies

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. What is Indexing in Mysql
  • Ans. 

    Indexing in MySQL is a technique to improve the performance of database queries by creating a data structure that allows for faster data retrieval.

    • Indexes are created on one or more columns of a table.

    • They help in speeding up the search, sorting, and joining of data.

    • Indexes can be created using different algorithms like B-tree, hash, or bitmap.

    • Using indexes appropriately can significantly enhance query performance.

    • Exam...

  • Answered by AI
  • Q2. Opps concepts in php
  • Ans. 

    Object-oriented programming concepts in PHP

    • Encapsulation: bundling data and methods together in a class

    • Inheritance: creating new classes based on existing ones

    • Polymorphism: using a single interface to represent different types

    • Abstraction: hiding unnecessary details and exposing only essential features

    • Class: blueprint for creating objects

    • Object: instance of a class

    • Method: function defined inside a class

    • Property: variabl

  • Answered by AI

Skills evaluated in this interview

Interview Questionnaire 

2 Questions

  • Q1. Core python
  • Q2. OOPS concept
Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(4 Questions)

  • Q1. Basic JavaScript and React.js questions
  • Q2. Questions on functions, hooks and DOM
  • Q3. Questions on SSR
  • Q4. Questions on strings and arrays
Round 2 - Coding Test 

Api related questions

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Campus Placement and was interviewed before Mar 2023. There was 1 interview round.

Round 1 - One-on-one 

(1 Question)

  • Q1. Asked two array and string dsa questions of medium-hard level

Interview Preparation Tips

Topics to prepare for Media.net Software Services (India) Software Developer interview:
  • DSA
Interview experience
4
Good
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 

Held on interview bit. 3 ques were asked. Questions were from range query and DP.

Round 3 - Technical 

(1 Question)

  • Q1. 1 Hard DSA question. Given a sequence of positive numbers, make it a non-decreasing sequence. Operation allowed: adjacent elements can be added to form a single element. What is the minimum no of operatio...

Interview Preparation Tips

Interview preparation tips for other job seekers - Practice DSA as much as you can. Be well-versed in CS fundamentals such as CN, OS, DBMS, and OOPS.
Practice CP if you can.
Interview experience
5
Excellent
Difficulty level
Hard
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Campus Placement and was interviewed in Aug 2023. There were 4 interview rounds.

Round 1 - Coding Test 

It will be around 3 hours and 2 questions of leetcode hard difficulty will be asked in the interview and 1 question is of codeforces 2400+ difficulty question.

Round 2 - Technical 

(2 Questions)

  • Q1. 1-2 DSA medium-hard difficulty question will be asked.
  • Q2. CS fundamentals in depth had been asked in the ending of the interview.
Round 3 - Technical 

(1 Question)

  • Q1. System Design problem was asked.
Round 4 - HR 

(1 Question)

  • Q1. This is a cultural fit round. Common HR question was asked.

Interview Preparation Tips

Interview preparation tips for other job seekers - Competitive programmer at the minimum rank of codeforces specialist is must.In depth knowledge of CS fundamentals is required. Basic Understanding of system design concepts is must,with standard problems.

I appeared for an interview in Dec 2020.

Round 1 - Coding Test 

(2 Questions)

Round duration - 75 minutes
Round difficulty - Easy

This round was conducted in Hackerrank portal for a total duration of 75 minutes and was divided into 4 sections.

1st Section : Aptitude Section : 14 questions , 28 minutes
2nd Section : Technical Section : 12 questions , 17 minutes
3rd Section :1 coding Questions : 20 minutes+30 minutes

This Round was Conducted on Hackerrank (Webcam Enabled).

  • Q1. Given a problem statement and a piece of code, how would you find and correct the bug in the code?
  • Ans. 

    To find and correct a bug in code, analyze problem statement, review code, use debugging tools, and test different scenarios.

    • Understand the problem statement and expected output

    • Review the code for syntax errors, logical errors, and potential bugs

    • Use debugging tools like breakpoints, print statements, and IDE debuggers

    • Test the code with different inputs and edge cases to identify the bug

    • Make necessary corrections and re

  • Answered by AI
  • Q2. 

    Nodes at Distance K from Target Node in Binary Tree

    Given a Binary Tree of distinct integers and two integers, target and K, return a list of values of all nodes located at a distance K from the target no...

  • Ans. 

    Find nodes at distance K from target node in a Binary Tree.

    • Use BFS to traverse the tree and keep track of the distance of each node from the target node.

    • Maintain a set to keep track of visited nodes to avoid revisiting them.

    • Return the values of nodes at distance K from the target node.

  • Answered by AI
Round 2 - Video Call 

(1 Question)

Round duration - 90 minutes
Round difficulty - Medium

I was shared a link of Google Meet and the Google Docs was shared where there was 1 coding problem to be coded there and then the code was run on an IDE to check the sample tests.
Then the interview was followed by a lot of Operating System and Computer System Architecture Questions.
There were 2 Interviewers and both were helpful.
The timing was from 2:30 PM to 4:00 PM

  • Q1. 

    Subarray Challenge: Largest Equal 0s and 1s

    Determine the length of the largest subarray within a given array of 0s and 1s, such that the subarray contains an equal number of 0s and 1s.

    Input:

    Input beg...

  • Ans. 

    Find the length of the largest subarray with equal number of 0s and 1s in a given array.

    • Iterate through the array and maintain a count of 0s and 1s encountered so far.

    • Store the count difference in a hashmap with the index as key.

    • If the same count difference is encountered again, the subarray between the two indices has equal 0s and 1s.

    • Return the length of the longest subarray found.

  • Answered by AI
Round 3 - HR 

Round duration - 45 minutes
Round difficulty - Easy

The round was held on Google Meet with HR from 2:30 PM to 3:15 PM.
The HR was friendly and asked the basic questions.

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 1 in MumbaiEligibility criteriaAbove 8 CGPAMedia.net interview preparation:Topics to prepare for the interview - DP, Greedy Techniques, Sorting Concepts, OS, DBMSTime required to prepare for the interview - 2 monthsInterview preparation tips for other job seekers

Tip 1 : Practice daily 4-5 medium level problems on sites like Leetcode, CodeZen, Hackerearth
Tip 2 : Even though Data Structures and Algorithms is the base but study Course Subjects like DBMS,OS,OOPS too.
Tip 3 : Try to Participate in Contests on LeetCode,Codeforces.

Application resume tips for other job seekers

Tip 1 : Mention atleast 1 project and past work experience as it sets good impression.
Tip 2 : Keep your resume up to date for the role you are applying.
Tip 3 : Try to keep your resume of 1 Page.

Final outcome of the interviewSelected

Skills evaluated in this interview

I appeared for an interview in Feb 2021.

Round 1 - Coding Test 

(2 Questions)

Round duration - 90 Minutes
Round difficulty - Hard

The test was at 6 pm with cam on and in fullscreen mode.

  • Q1. 

    Interleaving Two Strings Problem Statement

    You are given three strings 'A', 'B', and 'C'. Determine if 'C' is formed by interleaving 'A' and 'B'.

    String 'C' is an interleaving of 'A' and 'B' if the lengt...

  • Ans. 

    The problem involves determining if a string 'C' is formed by interleaving two given strings 'A' and 'B'.

    • Check if the length of 'C' is equal to the sum of the lengths of 'A' and 'B'.

    • Verify if all characters of 'A' and 'B' exist in 'C' while maintaining their order.

    • Return 'True' if 'C' is an interleaving of 'A' and 'B', otherwise return 'False'.

  • Answered by AI
  • Q2. 

    Construct Binary Tree from Inorder and Postorder Traversal

    Given two lists representing the inorder and postorder traversal of a binary tree of integer type with 'N' nodes, construct the binary tree and r...

  • Ans. 

    Construct a binary tree from inorder and postorder traversal lists and return its root.

    • Create a map to store the indices of elements in the inorder traversal list for quick access during tree construction.

    • Use the postorder list to determine the root of the tree and recursively build left and right subtrees.

    • Construct the tree by recursively dividing the inorder list based on the root index in postorder list.

    • Return the r...

  • Answered by AI
Round 2 - Video Call 

(1 Question)

Round duration - 45 Minutes
Round difficulty - Easy

At 10:00 AM. Interviewer was very friendly and young but his cam was off.

  • Q1. 

    Find Paths in Binary Tree

    Kevin has sketched a series of integers, forming a diagram that represents a binary tree. Challenged by a friend, Kevin needs to find all paths from the root to the leaf where th...

Round 3 - Face to Face 

(1 Question)

Round duration - 45 Minutes
Round difficulty - Easy

It was held at 4 p.m. The interviewer was senior compared to the one in the previous round. Also, his cam was also on, but he wasn't speaking much and neither giving any expressions.

  • Q1. 

    Boxes of Power Problem Statement

    Given a set of boxes represented by an array gainPower, where each box has a certain power value, along with an initial power value 'power', your task is to maximize the t...

  • Ans. 

    Maximize total score by selecting boxes optimally based on power values and operations.

    • Iterate through the boxes and perform operations based on power values and current score

    • Keep track of power, score, and selected boxes to maximize total score

    • Example: For input [3, 50, [20, 30, 40]], select boxes with power 20 and 30 to get a score of 2

  • Answered by AI

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 1 in MumbaiEligibility criteriaNone except no active backlogsMedia.net interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, DP, OOPS, Operating Systems, Computer NetworksTime required to prepare for the interview - 7 monthsInterview preparation tips for other job seekers

Tip 1 : DSA is the key. Starting from scratch, one can become proficients in a couple of months.
Tip 2 : Solve questions just a bit outside your comfort zone. Solve too easy to too hard questions is not of any use.
Tip 3 : Be consistent, make a habit of following good coding practices.
Tip 4 : Get to know the ins and out of your projects. You must be very confident while explaining those.
Tip 5 : Don't just directly to system-design, brush up on OOPS principles, networks, OS, DBMS before that.

Application resume tips for other job seekers

Tip 1 : Keep it crisp and to the point. Make bullet points.
Tip 2 : Bold the things you want to be paid attention to. Use numbers rather than vague sentences.
Tip 3 : Only put the things you are confident about.
Tip 4 : Don't put things irrelevant to the job, it only dilutes the main content.

Final outcome of the interviewRejected

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Selected Selected

I applied via Recruitment Consulltant and was interviewed before Mar 2022. There was 1 interview round.

Round 1 - One-on-one 

(2 Questions)

  • Q1. Tell me about yourself in brief ?
  • Q2. Was your the experience with previous companies ?

Interview Preparation Tips

Interview preparation tips for other job seekers - Be candid and do not hide anything from them. They want attitude over aptitude.

Epsilon Interview FAQs

How to prepare for Epsilon Lead 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 Epsilon. The most common topics and skills that interviewers at Epsilon expect are Business Intelligence, CRM, Campaign Management, Cloud Computing and Consulting.
What are the top questions asked in Epsilon Lead Developer interview?

Some of the top questions asked at the Epsilon Lead Developer interview -

  1. Usage and importance of Abstract and Interf...read more
  2. Filters in MVC and sample usa...read more
  3. Indexers in SQL serv...read more

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Epsilon Lead Developer Salary
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₹14.5 L/yr - ₹34.8 L/yr
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4.3

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