Java - Module 3 Quiz

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

• To find the length of the string

• To convert the string to uppercase

• To concatenate two strings

• To find a specific character in the string

Which method can be used to convert a string to uppercase in Java?

• concat()

• indexOf()

• toLowerCase()

• toUpperCase()

What does the indexOf() method in Java return?

• The length of the string

• The index of the first occurrence of a specified text

• The position of the last character in the string

• The number of whitespace characters in the string

How can you concatenate two strings in Java using the + operator?

• By combining them directly with the + operator

• By converting both strings to uppercase

• By adding a space between the strings

• By using the concat() method

What is the purpose of the backslash escape character in Java strings?

• To find the index of a character

• To avoid errors when using special characters

• To convert characters to uppercase

• To add a space between characters

What does the sequence ' insert in a Java string?

• A backslash

• A whitespace character

• A single quote

• A double quote

What happens when you add two numbers in Java?

• The result is a number

• The result is a string

• The numbers are concatenated

• An error occurs

What is the result of adding two strings in Java?

• A number

• A string concatenation

• An error

• A whitespace character

What is the purpose of the + operator in Java when used with strings?

• To multiply two strings

• To add two strings

• To divide two strings

• To subtract two strings

How can you insert a double quote in a Java string?

• Using the toUpperCase() method

• Using the concat() method

• Using the backslash escape character

• Using the indexOf() method