Java Collections Framework Quiz

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

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.

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

<p>Collections are generic and invariant, while arrays are covariant.</p> Signup and view all the answers

<p>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.</p> Signup and view all the answers

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

<p>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.</p> Signup and view all the answers

<p>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.</p> Signup and view all the answers

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

<p>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.</p> Signup and view all the answers