1
Which of these interface declares core method that all collections will have?
Correct Answer
Collection
☑ MCQ PRACTICE
Java Programming Part 4
Practice objective questions for quick revision and examination preparation. Try answering each question before revealing the answer.
Java Programming - Part-4
2
Which of these interface handle sequences?
Correct Answer
List
3
Which of this interface must contain a unique element?
Correct Answer
Set
4
Which of these is a Basic interface that all other interface inherits?
Correct Answer
Collection
5
Which of these is static variable defined in Collections?
Correct Answer
All of the mentioned
6
Which of these packages contain all the collection classes?
Correct Answer
java.util
7
Which of these classes is not part of Java’s collection framework?
Correct Answer
Maps
8
Which of this interface is not a part of Java’s collection framework?
Correct Answer
SortedList
9
Which of these methods deletes all the elements from invoking collection?
Correct Answer
clear()
10
What is Collection in Java?
Correct Answer
A group of objects
11
Which of these classes is not part of Java’s collection framework?
Correct Answer
Queue
12
Which of these methods deletes all the elements from invoking collection?
Correct Answer
clear()
13
The collection
Correct Answer
extends Iterable interface
14
Which of these interfaces declares core method that all collections will have?
Correct Answer
Collection
15
Which of these interfaces handle sequences?
Correct Answer
List
16
Which of these interface is not a part of Java’s collection framework?
Correct Answer
SortedList
17
Which of these interface must contain a unique element?
Correct Answer
Set
18
Which of these is Basic interface that all other interface inherits?
Correct Answer
Collection
19
Which of these is an incorrect form of using method max() to obtain maximum element?
Correct Answer
max(Comparator comp)
20
Which of these methods sets every element of a List to a specified object?
Correct Answer
fill()
21
Which of these methods can randomize all elements in a list?
Correct Answer
shuffle()
22
Which of these methods can convert an object into a List?
Correct Answer
singletonList()
23
Which of these is true about unmodifiableCollection() method?
Correct Answer
unmodifiableCollection() method is available only for List and Set.
24
Which of these is static variable defined in Collections?
Correct Answer
All of the mentioned
25
Which of these standard collection classes implements a dynamic array?
Correct Answer
ArrayList
26
Which of these class can generate an array which can increase and decrease in size automatically?
Correct Answer
ArrayList()
27
Which of these method can be used to increase the capacity of ArrayList object manually?
Correct Answer
ensureCapacity()
28
Which of these method of ArrayList class is used to obtain present size of an object?
Correct Answer
size()
29
Which of these methods can be used to obtain a static array from an ArrayList object?
Correct Answer
Array()
30
Which of these method is used to change an element in a LinkedList Object?
Correct Answer
set()