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Java Quiz Day 38
Question 1
What is the main characteristic of the Set interface in Java?
- A
Maintains insertion order
- B
Does not allow duplicate elements
- C
Allows duplicate elements
- D
Stores elements in key-value pairs
Question 2
Which Set implementation maintains the insertion order of elements?
- A
HashSet
- B
TreeSet
- C
LinkedHashSet
- D
SortedSet
Question 3
Which Set implementation sorts elements in natural order?
- A
HashSet
- B
TreeSet
- C
LinkedHashSet
- D
EnumSet
Question 4
Which of the following is true about TreeSet in Java?
- A
It allows duplicate elements
- B
It stores elements in random order
- C
It stores elements in sorted order
- D
It is an implementation of List
Question 5
What is the default initial capacity of a HashSet in Java?
- A
10
- B
20
- C
5
- D
16
Question 6
What is the primary difference between HashSet and TreeSet?
- A
HashSet stores elements in a sorted order, while TreeSet does not
- B
HashSet allows duplicates, while TreeSet does not
- C
HashSet is faster than TreeSet for adding elements
- D
HashSet stores elements in an unordered manner, while TreeSet stores elements in sorted order
Question 7
Which of the following collections allows for null elements in Java?
TreeSet
LinkedHashSet
HashSet
None of the above
There are 7 questions to complete.