Java Methods Quiz

What is the purpose of inheritance in Java?

To allow a class to inherit properties and behaviors from another class

What does the length() method return for the string 'RockStar'?

9

What does the indexOf method return for the character 'S' in the string 'RockStar'?

5

What does the charAt(5) method return for the string 'RockStar'?

t Signup and view all the answers

What does the contains method return for the characters 'tar' in the string 'RockStar'?

false Signup and view all the answers

What does the replace method return for replacing 'Rock' with 'Duke' in the string 'RockStar'?

DukeStar Signup and view all the answers

What is a Java String in technical terms?

An array of characters Signup and view all the answers

Why are Strings important in computer science?

Language symbols are important to meaning and decision making Signup and view all the answers

What is the result of concatenating two strings in Java?

A new string containing the combined characters of the original strings Signup and view all the answers

What does the 'Length' method in Java String class do?

Obtain the length of the string Signup and view all the answers

How is a String represented in Java?

As a series of characters enclosed in double quotes Signup and view all the answers

What is the primary purpose of expressions in Java?

To compute and assign values to variables Signup and view all the answers

Which statement is used to evaluate a condition in Java?

if statement Signup and view all the answers

Which type of statement is used to control the flow of Java code?

Control flow statement Signup and view all the answers

What is the purpose of a loop statement in Java?

To repeat a block of code Signup and view all the answers

What is the purpose of the if-else statement in Java?

To execute a block of code if the condition of the if-block is false Signup and view all the answers

What is the main difference between the if-else statement and the if-else-if ladder?

The if-else statement has only one else block, while the if-else-if ladder can have multiple else-if blocks Signup and view all the answers

In nested if-statements, what happens if the condition of the outer if-statement is false?

The program exits the nested if-statements and continues with the rest of the code Signup and view all the answers

What is the main advantage of using a switch statement over if-else-if statements?

Switch statements provide better readability and are easier to use Signup and view all the answers

When is the for loop in Java used?

When the number of iterations is known Signup and view all the answers

What is the initial capacity of an empty list constructed using the ArrayList class in Java?

10 Signup and view all the answers

Which package is the ArrayList class implemented in?

java.util Signup and view all the answers

What type of implementation does the ArrayList class provide for the List interface?

Dynamic array-like Signup and view all the answers