Coherent Engineer Interview Questions and Answers

Selection process involve 3 rounds test, interview, managerial, test is about aptitude ,logical reasonong andfew coding questions were there

Q1. Explain about java oops concepts
Ans. 
Java OOPs concepts include inheritance, polymorphism, encapsulation, and abstraction.
• Inheritance allows a class to inherit properties and behavior from another class.

• Polymorphism allows objects to be treated as instances of their parent class.

• Encapsulation hides the internal state of an object and only exposes necessary methods.

• Abstraction focuses on the essential features of an object while hiding the implementation d
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Q2. What is spring and spring boot framework?
Ans. 
Spring is a Java framework for building enterprise applications. Spring Boot is a tool that simplifies the setup and development of Spring applications.
• Spring is a powerful Java framework used for building enterprise applications.

• It provides comprehensive infrastructure support for developing Java applications.

• Spring Boot is an extension of the Spring framework that simplifies the setup and development of Spring applic...read more
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Aptitude and business email writing

English proficiency test

Q1. Hhhiuuhhhhhhhhhhhhhhh
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Q2. Hhhhhffhhhhhhhhhhhhhh
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Q3. Hdhbdhhhhhhhhhhhhhhhhhh
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Provided CAD drawing to make 3D . It was good

Q1. Good interview asked about material
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Q2. What is plastic material
Ans. 
Plastic material is a synthetic or semi-synthetic material made from polymers that can be molded into different shapes and forms.
• Plastic materials are lightweight and durable

• They can be transparent or colored

• Common examples include polyethylene, polypropylene, PVC, and PET
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Q3. Plastic PP used for food grade
Ans. 
Plastic PP is commonly used for food grade applications due to its high heat resistance and chemical inertness.
• PP (polypropylene) is a type of plastic known for its high heat resistance, making it suitable for use in food grade applications.

• PP is also chemically inert, meaning it does not react with food or beverages, making it a safe choice for food contact materials.

• Common food grade items made from PP include contai...read more
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Q4. What is steel material
Ans. 
Steel is a metal alloy made primarily of iron with a small amount of carbon.
• Steel is known for its strength, durability, and versatility.

• It is commonly used in construction, manufacturing, and transportation industries.

• Examples of steel products include beams, pipes, and automotive parts.
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Percentage
Analyst
Blood relation

Q1. Explain above data structure
Ans. 
Data structure is a way of organizing and storing data in a computer so that it can be accessed and modified efficiently.
• Data structures can be linear (arrays, linked lists) or non-linear (trees, graphs)

• They can be static (fixed size) or dynamic (size can change during program execution)

• Examples include stacks, queues, hash tables, and binary search trees
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Q2. What is database
Ans. 
A database is a structured collection of data that is organized in a way that allows for easy access, management, and retrieval.
• A database stores data in tables, which consist of rows and columns.

• It allows for efficient querying and retrieval of specific information.

• Examples of databases include MySQL, Oracle, and MongoDB.
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Q1. What is performance testing
Ans. 
Performance testing is the process of evaluating the speed, responsiveness, stability, and scalability of a system under varying conditions.
• Performance testing measures the system's ability to handle a specific workload.

• It helps identify bottlenecks, performance issues, and areas for improvement.

• Various types of performance testing include load testing, stress testing, endurance testing, and spike testing.

• Examples of p...read more
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Q2. How you will use jmeter
Ans. 
JMeter is a load testing tool used by engineers to measure the performance of web applications.
• JMeter can be used to simulate multiple users accessing a web application to test its performance under different loads.

• It can measure response times, throughput, and server performance.

• JMeter can also be used for functional testing, API testing, and database testing.

• It supports various protocols like HTTP, HTTPS, FTP, JDBC, ...read more
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Q3. Advantages of jmeter tools
Ans. 
JMeter tools offer several advantages for engineers.
• JMeter allows engineers to perform load testing and measure the performance of web applications.

• It supports multiple protocols such as HTTP, FTP, JDBC, SOAP, and more.

• Engineers can create and execute test plans with various configurations and parameters.

• JMeter provides real-time reporting and analysis of test results.

• It offers distributed testing capabilities to simul...read more
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Q1. Where do you like yourself 5 years down the line
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Stack, Linked list, Algorithms, Hashmap , Search

Q1. Find all possible permutations of a string
Ans. 
Permutations of a string are all possible rearrangements of its characters.
• Use recursion to generate all possible permutations

• Swap characters at each position to generate different permutations

• Store each permutation in an array of strings
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