Java String Methods in the Confines

What is the purpose of the length() method in Java String?

• To reverse the characters in a string.

• To remove all whitespace from a string.

• To convert a string to uppercase.

• To find the length or number of characters in a string.

What symbol is used to combine two strings in Java?

• +

• *

• &

• -

What is the result of the concatenation of 'Hello' and 'World' in Java?

• Hello World

• Hello, World

• Hello_World

• HelloWorld

How do you extract a substring from a Java String?

• split() method

• replace() method

• substring() method

• charAt() method

What is the output of the substring(2, 5) method called on the String 'Hello World'?

• llo

• o Wo

• lo W

• Hel

What is the purpose of the indexOf() method in Java String?

• To convert a string to lowercase.

• To find the index of a specified character or substring within a given string.

• To check if a string contains a specified character or substring.

• To remove a specified character or substring from a string.

What is the output of the indexOf('l') method called on the String 'Hello World'?

• 6

• 2

• 0

• 4

What is the purpose of the startsWith() method in Java String?

• The purpose of the startsWith() method in Java String is to check if a string starts with a specified prefix.

• The startsWith() method in Java String is used to convert a string to uppercase.

• The startsWith() method in Java String is used to check if a string ends with a specified suffix.

• The startsWith() method in Java String is used to compare two strings and return true if they are equal.

Write the heading for a method called getLast that returns the last name of a person's name.​ (a)   ​ ​ (b)   ​ (c)   ​ (d)  

• public
• String
• getLast
• (String name)

String word = "Computer Science";

System.out.println(word.substring(2,5));

• mpu

• Sc

• omp

• mp