Epsilon Senior Engineer Interview Questions and Answers

Q1. Internal working of hashmap
Ans. 
HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.

• If multiple keys hash to the same index, a linked list is used to handle collisions.

• HashMap uses the hashCode() method of ke...read more
Answered by AI
Add your answer
Q2. What are the feature of jdk 8
Ans. 
JDK 8 features include lambda expressions, functional interfaces, streams, and default methods.
• Lambda expressions allow you to write code in a more concise and readable way.

• Functional interfaces enable the use of lambda expressions.

• Streams provide a way to work with sequences of elements efficiently.

• Default methods allow interfaces to have concrete methods.

• Date and Time API improvements.
Answered by AI
Add your answer

Q1. MITER attack framwork/ Cyber kill chain process/attack vectors
Add your answer
Q2. SIEM tools and its use
Ans. 
SIEM tools are security information and event management tools used to collect, analyze, and report on security data.
• SIEM tools help organizations to detect and respond to security incidents in real-time.

• They collect data from various sources such as network devices, servers, and applications.

• SIEM tools use correlation rules to identify patterns and anomalies that may indicate a security threat.

• Examples of SIEM tools i...read more
Answered by AI
Add your answer
Q3. Are you written a playbooks rules
Ans. 
Yes, I have experience writing playbooks rules for automation in various engineering projects.
• Yes, I have written playbooks rules using tools like Ansible for automating infrastructure tasks.

• I have experience creating rule-based automation scripts to streamline engineering processes.

• I can provide examples of playbooks I have written for automating deployment, configuration, and monitoring tasks.
Answered by AI
Add your answer
Q4. Digital forensics working procedures
Ans. 
Digital forensics working procedures involve collecting, preserving, analyzing, and presenting digital evidence in a legally admissible manner.
• Collecting digital evidence from various sources such as computers, mobile devices, and cloud storage.

• Preserving the integrity of the evidence by creating forensic images and maintaining a chain of custody.

• Analyzing the evidence using specialized tools and techniques to uncover ...read more
Answered by AI
Add your answer

Objective technical question was given.

Q1. Java, DB, Spring, UI related questions asked.
Add your answer
Q2. CoreJava Multi-threading
Add your answer
Q3. Database many to many relattionship related question
Add your answer

Q1. Mutli-threading related questions
Add your answer

Q1. Salary expectation and joining details.
Add your answer

Q1. Memory management questions
Add your answer
Q2. Kernel questions
Add your answer

Q1. Power BI DAX calculations
Add your answer

Q1. RLS Implementation
Add your answer

Q1. 1. project overview 2. difference between job, task and stage 3. difference between partition and colease 4. optimization techniques
Add your answer

Q1. Azure basics azure data factory
Add your answer

Q1. Java Multithreading
Add your answer
Q2. Core java using java 8 features
Ans. 
Core Java features in Java 8 include lambda expressions, functional interfaces, streams, and default methods.
• Lambda expressions allow you to pass functionality as an argument to a method.

• Functional interfaces have a single abstract method and can be used with lambda expressions.

• Streams provide a way to process collections of objects in a functional style.

• Default methods allow interfaces to have methods with implementat...read more
Answered by AI
View 1 more answer
Q3. Oops concepts in java
Ans. 
Oops concepts in java refer to Object-Oriented Programming principles like Inheritance, Encapsulation, Polymorphism, and Abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability of a method to do different things based on the object it is acting upon.

• Abstraction: Hiding the imp...read more
Answered by AI
Add your answer
Q4. Spring MVC and Batch
Add your answer
Q5. Basic SQL queries, joins and all
Add your answer

Q1. Network questions
Add your answer
Q2. Bgp routing protocol
Add your answer