TCS Java Developer Interview Questions, Process, and Tips

Q1. Microservices architecture and monolethic architecture
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Q2. Rest controller and controller difference
Ans. 
Rest controller is used in Spring MVC for RESTful web services, while controller is used for general web requests.
• Rest controller is used for creating RESTful web services in Spring MVC

• Controller is used for handling general web requests in Spring MVC

• Rest controller uses @RestController annotation, while controller uses @Controller annotation

• Rest controller returns data in JSON or XML format, while controller returns d
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Q1. How can you get data of employees based on a desired location using streams in Java 8?
Ans. 
Use Java 8 streams to filter employees based on desired location.
• Use stream() method on the list of employees

• Use filter() method to filter employees based on desired location

• Use collect() method to collect the filtered employees into a new list
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Q2. Spring boot @pathvariable
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Find second largest number in an array

Q1. Given an array check whether pair exist with given sun
Ans. 
Check if a pair exists in an array with a given sum
• Iterate through the array and store the difference between the target sum and each element in a HashSet

• For each element, check if the element exists in the HashSet

• Return true if a pair is found, otherwise return false
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Q1. Basic details about me, then ask for working in shift
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Q1. Java 8 features
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Q1. Multi threading
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Q2. OOPs concepts explain
Ans. 
OOPs concepts are the foundation of object-oriented programming, including encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

• Inheritance: Allows 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 imple...read more
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Q1. How many ways to create a thread in Java
Ans. 
There are multiple ways to create a thread in Java, including extending the Thread class, implementing the Runnable interface, and using Java 8's lambda expressions.
• Extending the Thread class

• Implementing the Runnable interface

• Using Java 8's lambda expressions
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Q2. What is the difference b/w spring and spring boot
Ans. 
Spring is a framework for building Java applications, while Spring Boot is a tool that simplifies the setup and configuration of Spring applications.
• Spring is a comprehensive framework that provides various modules for building Java applications, such as Spring MVC, Spring Security, and Spring Data.

• Spring Boot is an opinionated tool that simplifies the setup and configuration of Spring applications by providing default...read more
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