SCJP Certification

A: Adding objects to a collection
B: Iterating through a collection
C: Finding out if an object is in a collection
D: Retrieving an object from a collection

All answer options are correct because:

The Collections Framework in Java is a hierarchy of interfaces and classes that provides a technology for managing a group of objects. It is used to provide a central and unified theme for managing a group of objects. The Java Collections Framework is designed to meet the following goals:

• To offer high performance in terms of efficiency.
• To allow different types of collections to work in a similar way and with a high degree of interoperability.
• To ensure collections are flexible and can be easily extended.

Following are the basic types of operations allowed in a collection:

• Adding objects to a collection
• Removing objects from a collection.
• Retrieving an object from a collection.
• Finding out if an object is in a collection.
• Iterating through a collection.