Exterro R&D Java Developer Interview Questions and Answers

Basics questions of logical reasoning , english , mathematics etc

Q1. How to check current version of java coding question reverse a string project explaniation that you mention in your resume. interfaces?
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Q2. Encapsulation vs abstraction
Ans. 
Encapsulation is hiding implementation details while abstraction is hiding unnecessary details.
• Encapsulation is achieved through access modifiers like private, protected, and public.

• Abstraction is achieved through abstract classes and interfaces.

• Encapsulation protects the data from external interference while abstraction focuses on the essential features.

• Example of encapsulation: hiding the implementation details of a ...read more
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Q3. Jvm vs jre vs jdk
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JVM is a virtual machine that executes Java bytecode. JRE is a runtime environment that includes JVM and libraries. JDK is a development kit that includes JRE and tools for developing Java applications.
• JVM stands for Java Virtual Machine and is responsible for executing Java bytecode.

• JRE stands for Java Runtime Environment and includes JVM and libraries required to run Java applications.

• JDK stands for Java Development ...read more
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Q1. Experience in past proyects
Ans. 
I have worked on various projects ranging from web development to mobile app development, gaining experience in different technologies and frameworks.
• Developed a web application using React.js and Node.js for a client in the e-commerce industry

• Created a mobile app using Flutter for a startup in the travel sector

• Collaborated with a team to implement a machine learning algorithm for data analysis in a research project
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Q2. Experience leading a group of develeopers
Ans. 
Led a team of developers on a project to develop a new software application.
• Managed a team of 5 developers to ensure project deadlines were met

• Assigned tasks to team members based on their strengths and expertise

• Held regular team meetings to discuss progress and address any issues

• Provided guidance and support to team members when needed

• Collaborated with other departments to gather requirements and feedback
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Q1. It was more like a talk about your experience
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Q2. Code test to create a small search enginee
Ans. 
Code test to create a small search engine
• Create a function that takes a search query and an array of strings as input

• Iterate through the array of strings to find matches with the search query

• Return an array of strings that contain the search query
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The technical aptitude was assessed through scenario-based questions during the L1 portion.

Q1. The technical panel conducted discussions on both scenarios and coding.
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Q1. HR discussion is the final round of the interview process.
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It was combination of mcqs and 2 coding questions

Q1. What is oops concepts
Ans. 
Object-oriented programming concepts that focus on objects and classes for better code organization and reusability.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

• Inheritance: Ability of a class to inherit properties and behavior from another class.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation det...read more
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Q2. Difference between java nd putjon
Ans. 
Java is a programming language while Putjon is not a recognized term in software development.
• Java is a widely used programming language for developing applications.

• Putjon is not a recognized term in software development, it may be a typo or a specific term not commonly used.

• There is no direct comparison between Java and Putjon as they are not related.
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Q3. Tell about ur project
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Q1. What are your strengths
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Q2. What is ur greatest comeback
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Coding test was medium to hard leetcode problems.

Q1. What is let, const and var?
Ans. 
let, const, and var are keywords used for variable declaration in JavaScript.
• let is block-scoped and can be reassigned.

• const is block-scoped but cannot be reassigned.

• var is function-scoped and can be reassigned.
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Q1. String palindrome
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Q2. Find all anagrams in a string
Ans. 
Find all anagrams in a string
• Create a hashmap to store the frequency of characters in the input string

• Iterate through the input string and check if the frequency of characters matches the hashmap for each substring of the same length

• Store the substrings that are anagrams in an array and return it
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Q1. Linked list (detect loop, reverse, delte a node) tree (height, DFS) graph theory concept C++ basic questions
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Q1. Total 3 round of Technical interviews.
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