Curriculum
Course: Learn Java Programming
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Curriculum

Learn Java Programming

Chapter 0: Computer Language Generations and Environment Setup

0/4

Chapter 1: Introduction to Java

0/6

Chapter 2: Java Data Types, Tokens and Variables

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Chapter 3: Working with User Input in Java

0/6

Chapter 4: Java Operators and Expressions

0/9

Chapter 5: Understanding Control Statements in Java

0/8

Chapter 6: Working with Wrapper Classes Arrays in Java

0/9

Chapter 7: Understanding Classes and Methods in Java Part 1

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Chapter 8: Understanding Constructors and Encapsulation in Java

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Chapter 8: Understanding Methods and Objects in Java Part 2

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Chapter 9: Working with Inheritance and Polymorphism in Java

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Chapter 10: Working with Package, Abstract Class and Interface in Java

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Chapter 11: String Handling in Java

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Chapter 12: Understanding Error and Exception Handling in Java

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Chapter 13: Working with I/O Stream Classes and File Handling in Java

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Chapter 14: Working with Multithreading in Java

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Chapter 15: Working with Generics

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Chapter 16: Working with Collection Frameworks

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Chapter 17: Working with AWT and Swings in Java

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Chapter 18: Event Handling in Java

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Chapter 19: Working with JDBC in Java - Part 1

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Chapter 20: Working with JDBC in Java - Part 2

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Quiz

Quiz-Working With List in Java

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  • Questions count: 15
  • Passing grade: A
  • Time limit: 10 minutes
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1.

What is the primary advantage of using a generic List (e.g., List<String>) in Java?

It allows storing elements of multiple data types in the same list.
It improves type safety by ensuring that only objects of the specified type can be added to the list, and it eliminates the need for explicit casting when retrieving elements.
It automatically sorts the elements added to the list.
It provides better performance compared to non-generic lists.
2.

Which of the following is an interface in Java that represents an ordered collection of elements, allowing duplicate values?

Set
Map
List
Queue
3.

What will be the output of the following code snippet?

List<String> colors = new ArrayList<>();
colors.add("Red");
colors.add("Green");
colors.add("Blue");
colors.remove(1);
System.out.println(colors);

[Red, Green, Blue]
[Red, Blue]
[Green, Blue]
[Red]
4.

Which of the following operations is generally more efficient in an ArrayList compared to a LinkedList?

Inserting an element at the beginning of the list.
Deleting an element from the middle of the list.
Accessing an element at a specific index.
Iterating through all the elements in the list.
5.

Which of the following is the correct way to check if a Java List is empty?

list.length() == 0
list.size() == 0
list.isEmpty == true
list.count() == 0
6.

What is the purpose of the ListIterator interface in Java's Collections Framework?

It provides a way to iterate over a List in a forward direction only.
It provides a way to iterate over any Collection in both forward and backward directions, and allows modification of the collection during iteration.
It provides a way to iterate over a List in both forward and backward directions, and allows modification of the list during iteration.
It is used for sorting elements within a List.
7.

Which of the following methods can be used to remove all elements from a Java List?

clear()
removeAll()
delete()
empty()
8.

Which of the following operations is generally more efficient in a LinkedList compared to an ArrayList?

Accessing an element at a specific index
Getting the size of the list.
Inserting an element at the beginning or end of the list.
Searching for a specific element in the list.
9.

What is the primary difference in the underlying data structure between ArrayList and LinkedList?

ArrayList uses a doubly linked list, while LinkedList uses a dynamic array.
ArrayList allows duplicate elements, while LinkedList does not.
ArrayList uses a dynamic array, while LinkedList uses a doubly linked list.
LinkedList is synchronized, while ArrayList is not.
10.

Which of the following are common implementations of the List interface in Java?

HashSet
ArrayList
TreeMap
LinkedList
11.

What will be the state of the numbers list after executing the following code?

List<Integer> numbers = new ArrayList<>();
numbers.add(1);
numbers.add(2);
numbers.add(3);
numbers.subList(0, 2).clear();
System.out.println(numbers);

[1, 2, 3]
[]
[3]
[2, 3]
12.

Which List method is used to replace the element at a specific index with a new element?

replace(int index, E element)
update()
set(int index, E element)
add(int index, E element)
13.

Which List method returns the number of elements in the list?

length()
count()
size()
elements()
14.

Consider the following code snippet:

List<String> items = Arrays.asList("apple", "banana", "cherry");
items.set(1, "grape");
System.out.println(items);

What will be the output of this code?

[apple, banana, cherry]
[apple, grape, cherry]
[grape, banana, cherry]
An UnsupportedOperationException will be thrown.
15.

Which of the following statements is true about the indexOf() method of the List interface?

It returns the last occurrence of a specified element in the list.
It returns the first occurrence of a specified element in the list, or -1 if the element is not found.
It returns the index of all occurrences of a specified element in the list.
It throws a NoSuchElementException if the element is not found.
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