interview questions on java 8
Interview questions on Java 8 may include topics such as lambda expressions, functional interfaces, streams, default methods, method references, and the new Date and Time API. Employers may ask candidates to explain the difference between traditional loops and streams, demonstrate how to use lambda expressions for functional programming, and discuss the advantages of using default methods in interfaces. Candidates should also be prepared to describe the benefits of the new Date and Time API over the previous Date class, showcase their understanding of method references, and provide examples of functional interfaces in Java 8.
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1 — Java 8 Interview Questions:
These questions are designed to test a candidate’s knowledge and understanding of new features introduced in Java 8, such as lambda expressions, streams, functional interfaces, and the new date and time API.
2) Understanding Lambda Expressions:
Candidates may be asked to explain what lambda expressions are, how they are used, and demonstrate their ability to write simple lambda expressions to perform specific tasks.
3) Working with Streams:
Candidates should be able to demonstrate their understanding of streams in Java 8, how to create streams, perform operations on them using intermediate and terminal operations, and understand concepts like lazy evaluation.
4) Functional Interfaces and Default Methods:
Questions related to functional interfaces, which are interfaces with only one abstract method, and how default methods can be used to provide implementations in interfaces without breaking existing implementations.
5) Date and Time API:
Candidates may be tested on their knowledge of the new date and time API introduced in Java 8, including how to work with dates, times, time zones, formatting, parsing, and calculations.
6) Optional Class and Other New Features:
Candidates should be familiar with other new features in Java 8, such as the Optional class, which is used to prevent null pointer exceptions, and be able to explain when and how to use it.
By covering these topics and conducting mock interviews with practice questions, students can gain confidence and improve their understanding of Java 8 to excel in job interviews or professional settings.
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