List interface

Why is List an interface in Java?

• A) Represents unordered data.
• B) Provides positional access.
• C) Allows only unique elements.
• D) Inherits from ArrayList.

What is the purpose of the List interface?

• A) Ensure uniqueness of elements.
• B) Allow unordered collections.
• C) Maintain a sequence of elements.
• D) Provide only sequential access.

Can you make a List of interface in Java?

• A) No, interfaces cannot be listed.
• B) Yes, using the List interface.
• C) Only with ArrayList class.
• D) List is not for collections.

What is the List interface and its classes in Java?

• A) Defines only unordered collections.
• B) Represents a static array.
• C) Facilitates ordered collections.
• D) Inherits from the Collection class.

What are the types of List interface?

• A) HashSet, TreeMap, TreeSet, HashMap
• B) ArrayList, LinkedList, Stack, Vector
• C) PriorityQueue, HashTable, LinkedHashMap, ArrayDeque
• D) LinkedHashSet, HashList, ArrayStack, DoubleLinkedList

Is ArrayList an interface?

• A) Yes, ArrayList is an interface.
• B) No, ArrayList is a class.
• C) ArrayList is an extension of List.
• D) ArrayList is a type of Set.

What is Collection vs List interface?

• A) Collection is a child of List.
• B) Collection manages Lists only.
• C) List offers index-based access.
• D) List is a subset of Collection.

What are the three methods in the List interface in Java?

• A) Add, delete, update
• B) Insert, check, iterate
• C) Append, prepend, traverse
• D) AddAt, isEmpty, iterator

What is the List vs Set interface?

• A) List enforces uniqueness.
• B) Set provides index access.
• C) List has ordered elements.
• D) Set allows duplicates.

What is a list of () in Java?

• A) Collection classes
• B) Key-value pairs
• C) Sequential elements
• D) Sorted data