What is the primary difference between a `HashMap` and a `TreeMap` in the Java Collections Framework?

A `HashMap` does not maintain order, while a `TreeMap` does

A `TreeMap` uses a linked list to store elements

A `HashMap` is synchronized, while a `TreeMap` is not

A `TreeMap` allows duplicate keys, while a `HashMap` does not

What is the primary difference between a `HashSet` and a `LinkedHashSet` in the Java Collections Framework?

A `LinkedHashSet` maintains insertion order, while a `HashSet` does not

A `HashSet` uses a tree structure to store elements

A `LinkedHashSet` is synchronized, while a `HashSet` is not

A `HashSet` allows duplicate elements, while a `LinkedHashSet` does not

What is the primary difference between a `Queue` and a `Deque` in the Java Collections Framework?

A `Queue` represents a single-ended queue, while a `Deque` represents a double-ended queue

A `Queue` allows duplicate elements, while a `Deque` does not

A `Deque` is synchronized, while a `Queue` is not

A `Queue` is indexed, while a `Deque` is not

What is the purpose of the `Comparator` interface in Java Collections Framework?

It defines a comparison function for ordering elements

It represents a generic collection

It provides methods for hashing elements

It represents a synchronized collection

What is the primary difference between a `Stack` and a `Queue` in the Java Collections Framework?

A `Stack` uses a LIFO (Last-In-First-Out) order, while a `Queue` uses a FIFO (First-In-First-Out) order

A `Queue` allows duplicate elements, while a `Stack` does not

A `Stack` allows duplicate elements, while a `Queue` does not

A `Queue` uses a LIFO order, while a `Stack` uses a FIFO order

What is the purpose of the `toArray()` method in the Java Collections Framework?

It converts a collection to an array

What is the purpose of the `Iterator` interface in the Java Collections Framework?

It provides a way to iterate over a collection's elements

It defines a comparison function for ordering elements

It represents a synchronized collection

It provides methods for hashing elements

What is the purpose of the `Map.Entry` interface in the Java Collections Framework?

It represents a key-value pair in a map

It provides methods for hashing elements

It represents a synchronized collection

It defines a comparison function for ordering elements

In the Java Collections Framework, which method is used to obtain a synchronized (thread-safe) version of a collection?

`Collections.synchronizedCollection()`

What is the primary difference between a `HashSet` and a `LinkedHashSet` in the Java Collections Framework?

A `LinkedHashSet` maintains the insertion order of elements, while a `HashSet` does not

A `LinkedHashSet` allows duplicate elements, while a `HashSet` does not

A `HashSet` allows duplicate elements, while a `LinkedHashSet` does not

In Java, which method is used to obtain a synchronized (thread-safe) map from an existing map in the Java Collections Framework?

`Collections.synchronizedMap()`

What is the purpose of the `Collections.reverse()` method in the Java Collections Framework?

It reverses the order of elements in a list

It removes all elements from a list

It sorts a list in ascending order

What are the use of front and rear pointers in CircularQueue implementation?

Front and read pointers point to the first element

Front pointer points to first element; rear pointer points to the last element

Rear pointer points to first element; front pointer points to the last element

Front pointer points to the first element; rear pointer points to null object

Java Collections Framework Quiz

Authored by Jai Sharma

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of the Collections Framework?

To provide a unified architecture for representing and manipulating collections

To provide a way to create arrays

To define primitive data types

To handle exceptions

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which interface in the Java Collections Framework represents an ordered collection of elements that can contain duplicate values?

`Collection`

`Map`

`Set`

`List`

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary difference between a `List` and a `Set` in the Java Collections Framework?

A `Set` allows duplicate elements, while a `List` does not

A `List` is unmodifiable, while a `Set` is modifiable

A `List` allows duplicate elements, while a `Set` does not

A `Set` is indexed, while a `List` is not

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which class is typically used to implement a `List` in the Java Collections Framework?

`HashMap`

`ArrayList`

`LinkedList`

None of These

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the Java Collections Framework, which interface extends the `List` interface to provide more efficient insertions and deletions in the middle of the list?

`Map`

`Set`

`Deque`

`Queue`

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of the `Map` interface in the Java Collections Framework?

To store a collection of objects

To provide a stack data structure

To store unique elements

To store key-value pairs

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which class is typically used to implement a `Map` in the Java Collections Framework?

`HashMap`

`ArrayList`

`HashSet`

`LinkedList`

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Java Collections Framework Quiz

What is the purpose of the Collections Framework?

Which interface in the Java Collections Framework represents an ordered collection of elements that can contain duplicate values?

What is the primary difference between a `List` and a `Set` in the Java Collections Framework?

Which class is typically used to implement a `List` in the Java Collections Framework?

In the Java Collections Framework, which interface extends the `List` interface to provide more efficient insertions and deletions in the middle of the list?

What is the purpose of the `Map` interface in the Java Collections Framework?

Which class is typically used to implement a `Map` in the Java Collections Framework?

What is the primary difference between a `HashMap` and a `TreeMap` in the Java Collections Framework?

In the Java Collections Framework, which interface represents a collection of unique elements with no duplicates?

Which class is typically used to implement a `Set` in the Java Collections Framework?

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