Java Collections Framework Quiz

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What is the Java collections framework?

The Java collections framework is a set of classes and interfaces that implement commonly reusable collection data structures.

How do collections differ from arrays?

Collections do not need to be assigned a certain capacity when instantiated, can grow and shrink in size automatically, and cannot hold primitive data types.

What types of data can Collections hold?

Collections can hold references to objects and wrapper classes such as java.lang.Integer, java.lang.Long, or java.lang.Double.

What is an advantage of generic objects such as Collection over arrays?

Collections are generic and invariant, while arrays are covariant. Signup and view all the answers

How does the Java collections framework work?

Although referred to as a framework, it works in a manner of a library, providing both interfaces that define various collections and classes that implement them. Signup and view all the answers

What is the Java collections framework?

The Java collections framework is a set of classes and interfaces that implement commonly reusable collection data structures. Signup and view all the answers

How do collections and arrays differ?

Collections do not need to be assigned a certain capacity when instantiated, can grow and shrink in size automatically, and cannot hold primitive data types, unlike arrays. Signup and view all the answers

What types of data can collections hold?

Collections can hold wrapper classes such as java.lang.Integer, java.lang.Long, or java.lang.Double, but cannot hold primitive data types such as int, long, or double. Signup and view all the answers

What is the advantage of generic objects such as Collection over arrays?

Collections are generic and invariant, while arrays are covariant, which can be considered an advantage of generic objects such as Collection. Signup and view all the answers

How does the collections framework work?

Although referred to as a framework, it works in a manner of a library, providing both interfaces that define various collections and classes that implement them. Signup and view all the answers