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Collections Framework – Multiple Choice Questions (MCQs)

1. What is the Java Collections Framework?
- A. A set of interfaces and classes for storing and manipulating groups of objects
- B. A set of keywords used for object-oriented programming
- C. A tool for compiling Java code
- D. A library for graphical user interfaces
2. What is the root interface of the Java Collections Framework?
- A. Collection
- B. List
- C. Set
- D. Map
3. Which interface represents an ordered collection (sequence)?
- A. Set
- B. Map
- C. List
- D. Queue
4. Which interface represents a collection that contains no duplicate elements?
- A. List
- B. Map
- C. Set
- D. Queue
5. Which interface represents a collection that stores key-value pairs?
- A. List
- B. Set
- C. Map
- D. Queue
6. Which interface represents a collection designed for holding elements prior to processing?
- A. List
- B. Set
- C. Map
- D. Queue
7. Which of the following classes implements the `List` interface?
- A. HashSet
- B. TreeSet
- C. ArrayList
- D. HashMap
8. Which of the following classes implements the `Set` interface?
- A. ArrayList
- B. LinkedList
- C. HashSet
- D. TreeMap
9. Which of the following classes implements the `Map` interface?
- A. ArrayList
- B. HashSet
- C. TreeMap
- D. LinkedList
10. Which of the following classes implements the `Queue` interface?
- A. ArrayList
- B. HashSet
- C. LinkedList
- D. TreeMap
11. What is the difference between `HashSet` and `TreeSet`?
- A. `HashSet` maintains elements in sorted order
- B. `TreeSet` maintains elements in insertion order
- C. `HashSet` is faster but does not guarantee order
- D. `TreeSet` allows duplicate elements
12. What is the difference between `HashMap` and `TreeMap`?
- A. `HashMap` maintains entries in sorted order of keys
- B. `TreeMap` maintains entries in insertion order
- C. `HashMap` is faster but does not guarantee order
- D. `TreeMap` allows duplicate keys

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Collections Framework – Multiple Choice Questions (MCQs)

1. What is the Java Collections Framework?

2. What is the root interface of the Java Collections Framework?

3. Which interface represents an ordered collection (sequence)?

4. Which interface represents a collection that contains no duplicate elements?

5. Which interface represents a collection that stores key-value pairs?

6. Which interface represents a collection designed for holding elements prior to processing?

7. Which of the following classes implements the `List` interface?

8. Which of the following classes implements the `Set` interface?

9. Which of the following classes implements the `Map` interface?

10. Which of the following classes implements the `Queue` interface?

11. What is the difference between `HashSet` and `TreeSet`?

12. What is the difference between `HashMap` and `TreeMap`?

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