Java 8 Practice Exam

Java 8 Practice Exam

Java 8, the version of Java programming language was released in March 2014, and is a major update to Java. Java 8 has many new features for performance, and maintainability which includes the Lambda expressions, the Stream API for functional-style programming, a new Date and Time API (java.time), default methods in interfaces, and the Optional class for handling null values. Java 8 changed Java development and made it more expressive, and efficient.

Certification in Java 8 validates your skills and knowledge  in Java 8's advanced features, of Lambdas, Streams, and the new Date/Time API, to write efficient and maintainable Java applications.
Why is Java 8 certification important?

• The certification validates your expertise in Java 8 features.
• Enhances your career opportunities on advanced Java features.
• Increases your credibility in the software development.
• Boosts your employability for Java related roles.
• Sows your commitment to professional growth and learning in Java.
• Provides you a competitive edge in a job market.

Who should take the Java 8 Exam?

• Java Developer
• Software Engineer
• Backend Developer
• Full Stack Developer
• Web Developer (Java-based)
• Mobile Application Developer (Java-based)
• Java Architect
• Software Tester (focused on Java)
• DevOps Engineer (with Java background)
• Senior Java Developer
• System Engineer (Java expertise)
• Technical Lead (Java-focused teams)
• Java Application Support Engineer
• Java Integration Specialist
• Java Consultant

Skills Evaluated

Candidates taking the certification exam on the Java 8 is evaluated for the following skills:

• Lambda expressions and functional interfaces.
• Stream API .
• Optional class .
• New Date/Time API .
• Default methods in interfaces.
• Method references.
• Functional programming in Java.
• Collectors API to gather data in Streams.
• Java 8 features in multithreading and parallel streams.

Java 8 Certification Course Outline
The course outline for Java 8 certification is as below -

Domain 1 - Introduction to Java 8

• Overview of Java 8 Features
• Changes in Java 8 and Their Benefits
• Setting Up Java 8 Development Environment

Domain 2 - Lambda Expressions

• Syntax and Structure of Lambdas
• Using Functional Interfaces
• Lambda Scope and Closure
• Working with Lambda Expressions in Collections

Domain 3 - Stream API

• Understanding Streams in Java
• Stream Operations: Intermediate and Terminal
• Filtering, Mapping, and Reducing Data
• Collectors API for Collecting Results
• Parallel Streams for Performance Optimization

Domain 4 - Java 8 Date and Time API (java.time)

• Working with LocalDate, LocalTime, and LocalDateTime
• Manipulating Dates and Times
• Period and Duration Classes
• Formatting and Parsing Dates and Times
• Time Zone Handling with ZonedDateTime

Domain 5 - Default Methods in Interfaces

• Defining Default Methods
• Overriding Default Methods
• Multiple Inheritance of Interfaces
• The Use of Default Methods for Backward Compatibility

Domain 6 - Method References

• Types of Method References (Static, Instance, Constructor)
• Using Method References in Functional Interfaces
• Benefits of Method References for Code Readability

Domain 7 - Optional Class

• Using Optional to Avoid Null Pointer Exceptions
• Creating and Using Optionals
• Transforming and Filtering with Optional
• Optional vs Null and Best Practices

Domain 8 - Functional Interfaces

• Built-in Functional Interfaces (Predicate, Function, Consumer, Supplier)
• Creating Custom Functional Interfaces
• Using Functional Interfaces with Lambdas

Domain 9 - Collectors API

• Common Collectors (toList, toSet, joining, groupingBy, partitioningBy)
• Custom Collectors
• Collecting Data in Parallel

Domain 10 - Concurrency and Parallel Streams

• Using Parallel Streams for Performance
• Synchronization with Streams
• Best Practices for Concurrency with Streams