Extio Technology and Consulting LLP Software Development Engineer 1 Interview Questions, Process, and Tips

Q1. - Basic technical questions
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- Java and Springboot

Q1. - Salary discussions and basic HR questions
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Q1. What is lambda expression?
Ans. 
Lambda expression is a concise way to represent an anonymous function in programming languages.
• Lambda expressions are used to create functions without a name.

• They are often used in functional programming languages like Python and Java.

• Lambda expressions can be passed as arguments to higher-order functions.

• They are commonly used for short, one-off functions.

• Example: (x) => x * x is a lambda expression that squares a num
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Q2. What is functional interfaces in java 8?
Ans. 
Functional interfaces in Java 8 are interfaces with only one abstract method, used for lambda expressions.
• Functional interfaces can have multiple default or static methods, but only one abstract method.

• They are used for lambda expressions and method references.

• Examples include Runnable, Callable, Comparator, etc.
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Q3. What is default method in java 8?
Ans. 
Default method in Java 8 allows interfaces to have method implementations.
• Introduced in Java 8 to provide backward compatibility for interfaces

• Default methods can be overridden by implementing classes

• Used to add new methods to interfaces without breaking existing implementations
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Q4. How you create a spring boot application?
Ans. 
To create a Spring Boot application, you can use Spring Initializr to generate a project with necessary dependencies and configurations.
• Go to https://start.spring.io/

• Select the project metadata like group, artifact, dependencies, etc.

• Click on 'Generate' to download the project zip file.

• Extract the zip file and import the project into your IDE.

• Start coding your Spring Boot application.
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Q5. What is @RestController annotation
Ans. 
Annotation used in Spring framework to indicate that a class is a RESTful controller
• Used in Spring framework to define RESTful web services

• Eliminates the need for annotating every method with @ResponseBody

• Combines @Controller and @ResponseBody annotations
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Q6. What is spring boot dependency management?
Ans. 
Spring Boot dependency management is a feature that simplifies managing dependencies in a Spring Boot project.
• Spring Boot uses Maven or Gradle for dependency management

• Dependencies are declared in the pom.xml file for Maven or build.gradle file for Gradle

• Spring Boot provides a 'starter' dependencies that include commonly used libraries and frameworks

• Version conflicts are resolved automatically by Spring Boot
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