Java Programming for Complete Beginners - Java 16 - Step 08 - Exploring New Java API - List Set and Map - copyOf Methods

The video tutorial introduces new Java APIs, focusing on the copyOf method introduced in Java 10. It explains how to set up a Java project and demonstrates the use of the copyOf method to create unmodifiable lists, sets, and maps. The tutorial highlights the importance of using copyOf to prevent unwanted modifications to collections and provides practical examples of its application.

What is the first step in exploring new Java APIs according to the tutorial?

• Read the Java documentation

• Create a new Java project

• Install the latest Java version

• Set up a database connection

Which Java version introduced the 'copyOf' method?

• Java 8

• Java 11

• Java 9

• Java 10

What does the 'copyOf' method return when used on a List?

• An unmodifiable list

• A modifiable list

• A sorted list

• A reversed list

Why would you use the 'copyOf' method on a collection?

• To make the collection unmodifiable

• To sort the collection

• To duplicate the collection

• To reverse the collection

What happens if you try to modify a list created with 'copyOf'?

• The modification is allowed

• The list is sorted

• An error is thrown

• The list is duplicated

How does 'copyOf' behave when passed an already immutable collection?

• It creates a new copy

• It returns the same collection

• It throws an error

• It modifies the collection

Which of the following is true about 'copyOf' methods in Java?

• They require collections to contain null elements

• They are available only in Java 16

• They can create modifiable collections

• They are available in List, Set, and Map interfaces