Protechsoft Technologies Java Programmer Interview Questions and Answers

Q1. Explain architecture of your project
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Q2. Some questions on Java, Spring Boot and sql
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Q1. Project flow and some behavioural questions
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Q2. Project contribution of yours
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Developed a web application for tracking employee attendance and performance
• Implemented user authentication and authorization using Spring Security

• Utilized Hibernate for database interaction and data persistence

• Designed and developed RESTful APIs for frontend integration

• Used AngularJS for frontend development to create interactive user interfaces
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Q1. Basic formalities before offer release
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A standard online test conducted through one of the testing platforms.

Q1. Java 8 features
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Q2. Rest API
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Q3. Java 8 coding problem
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Q4. Collections
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Q1. It was based on my previous project
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Q1. Explain Spring Boot
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Q2. What is Redux in React
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Q3. What is Context API in React
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Q1. Difference between Hashset and Treeset
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Q2. Final Finally and finalize difference
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Q1. Java 8 Default Method
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Java 8 Default Method allows interfaces to have method implementations.
• Introduced in Java 8 to provide backward compatibility for interfaces

• Can have method implementations in interfaces using the 'default' keyword

• Used to add new methods to interfaces without breaking existing implementations
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Q2. Sort Array with given value
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Sort array of strings with a given value
• Use Arrays.sort() method with a custom Comparator to sort the array based on the given value

• Handle cases where the given value is not present in the array

• Example: Sort array ['apple', 'banana', 'orange', 'grape'] with 'banana' as the given value
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Q3. SQL Queries on Joins
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Q1. Basics of java like string ,string builder ,Buffer,scp
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Q2. Spring boot annotaions
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Q1. Diff between abstract class and interface
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Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
• Abstract class can have constructor, fields, and methods, while interface cannot have any of these.

• A class can extend only one abstract class, but can implement multiple interfaces.

• Abstract classes are used to define a common behavior among subclasses, while interfaces are used to define a contract for classes...read more
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Q2. Explain about handler methods
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Handler methods in Java are methods that are responsible for handling incoming requests and generating responses.
• Handler methods are typically defined in classes annotated with @Controller or @RestController.

• These methods are mapped to specific URLs using @RequestMapping or other mapping annotations.

• Handler methods can have parameters such as HttpServletRequest, HttpServletResponse, or model attributes.

• The return value...read more
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