What are Java Collections?

The video introduces the Java collections framework, highlighting its role in providing flexible methods for data manipulation. It compares arrays with collections, emphasizing the added flexibility collections offer. The video then focuses on the list collection, explaining its features and the classes that implement the list interface, such as ArrayList, LinkedList, and Vector. The tutorial sets the stage for practical coding examples in subsequent sessions.

What is the primary purpose of the Java Collections Framework?

• To simplify the syntax of Java programming

• To enhance the performance of Java applications

• To replace all primitive data types in Java

• To provide a set of classes and interfaces for data storage and manipulation

Which of the following is a characteristic of the List collection?

• It allows insertion and removal of elements at any index

• It is unordered

• It does not allow duplicate elements

• It is immutable

What is a key advantage of using ArrayList over arrays?

• ArrayList is faster than arrays

• ArrayList can store primitive data types directly

• ArrayList provides flexible methods for data manipulation

• ArrayList uses less memory than arrays

What are the three main types of collections in Java?

• List, Set, HashMap

• List, Queue, Stack

• Array, List, Map

• Tree, Graph, HashMap

Which of the following is true about the Set collection?

• It allows duplicate elements

• It maintains the order of elements

• It is a type of List

• It does not allow duplicate elements

Which class is NOT an implementation of the List interface?

• ArrayList

• LinkedList

• HashSet

• Vector

What is the role of interfaces in the Java Collections Framework?

• They store data directly

• They provide a blueprint for classes to implement specific methods

• They are only used for documentation purposes

• They are used to compile Java programs