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Welcome to the java util MCQs Page

Dive deep into the fascinating world of java util with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of java util, a crucial aspect of Java Programming. In this section, you will encounter a diverse range of MCQs that cover various aspects of java util, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Java Programming.

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Check out the MCQs below to embark on an enriching journey through java util. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Java Programming.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of java util. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

java util MCQs | Page 4 of 18

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Discuss
Answer: (a).Immutable Set
Q32.
What are the initial capacity and load factor of HashSet?
Discuss
Answer: (c).16, 0.75
Discuss
Answer: (a).HashSet internally implements HashMap
Q34.
What is the output of below code snippet?
public class Test 
{
 public static void main(String[] args) 
        {
  Set s = new HashSet();
  s.add(new Long(10));
  s.add(new Integer(10));
  for(Object object : s)
                {
      System.out.println("test - "+object);
  }
 }
}
Discuss
Answer: (a).Test โ€“ 10
Test โ€“ 10
Q35.
Set has contains(Object o) method.
Discuss
Answer: (a).True
Discuss
Answer: (d).SortedSet is an interface; TreeSet is a concrete class
Discuss
Answer: (a).ConcurrentModificationException is thrown
Discuss
Answer: (b).It maintains the insertion order and guarantees uniqueness
Q39.
Which of these standard collection classes implements a linked list data structure?
Discuss
Answer: (b).LinkedList
Q40.
Which of these classes implements Set interface?
Discuss
Answer: (b).HashSet

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