
CollectionsFramework
Quiz
•
Computers
•
University
•
Practice Problem
•
Medium
Satish T
Used 2+ times
FREE Resource
Enhance your content in a minute
30 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
How to retrieve all keys from a Map?
Answer explanation
map.keySet() returns a Set of keys.
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Set<Integer> s = new HashSet<>(); s.add(1); s.add(1); s.size(); // What is the size?
Answer explanation
Set doesn't allow duplicates. Only one element remains.
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Stack is which type of structure?
Answer explanation
Stack is Last-In-First-Out.
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
TreeSet stores elements in which order?
Answer explanation
TreeSet sorts elements in natural order.
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What does ListIterator allow?
Answer explanation
ListIterator supports bi-directional traversal.
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What does poll() return when queue is empty?
Answer explanation
poll() returns null if queue is empty.
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What does removeIf() method do?
Answer explanation
removeIf() removes items matching predicate.
Create a free account and access millions of resources
Create resources
Host any resource
Get auto-graded reports

Continue with Google

Continue with Email

Continue with Classlink

Continue with Clever
or continue with

Microsoft
%20(1).png)
Apple
Others
Already have an account?
Similar Resources on Wayground
25 questions
BDA-UNIT-2
Quiz
•
University
25 questions
Kuis Internet1 L2324
Quiz
•
University
25 questions
IAS QUIZ 12
Quiz
•
University
25 questions
Basic Components and Computer Evolution
Quiz
•
University
25 questions
26/50 cơ sở dữ liệu
Quiz
•
University
25 questions
Quiz on Operating System Basics
Quiz
•
University
25 questions
MAD Test3 Android Studio
Quiz
•
University
25 questions
PYTHON PROGRAMMING STRING Q6
Quiz
•
University
Popular Resources on Wayground
5 questions
This is not a...winter edition (Drawing game)
Quiz
•
1st - 5th Grade
25 questions
Multiplication Facts
Quiz
•
5th Grade
10 questions
Identify Iconic Christmas Movie Scenes
Interactive video
•
6th - 10th Grade
20 questions
Christmas Trivia
Quiz
•
6th - 8th Grade
18 questions
Kids Christmas Trivia
Quiz
•
KG - 5th Grade
11 questions
How well do you know your Christmas Characters?
Lesson
•
3rd Grade
14 questions
Christmas Trivia
Quiz
•
5th Grade
20 questions
How the Grinch Stole Christmas
Quiz
•
5th Grade
Discover more resources for Computers
26 questions
Christmas Movie Trivia
Lesson
•
8th Grade - Professio...
20 questions
christmas songs
Quiz
•
KG - University
20 questions
Holiday Trivia
Quiz
•
9th Grade - University
15 questions
Holiday Movies
Quiz
•
University
14 questions
Christmas Trivia
Quiz
•
3rd Grade - University
20 questions
Christmas Trivia
Quiz
•
University
8 questions
5th, Unit 4, Lesson 8
Lesson
•
KG - Professional Dev...
20 questions
Disney Trivia
Quiz
•
University
