Complete Java SE 8 Developer Bootcamp - String Operations and Operators

What is the purpose of the substring method in Java?

• To remove spaces from the string

• To convert the string to uppercase

• To change the original string

• To create a new string from a part of the original

Why is it important to capture the return value of string methods like substring?

• To ensure the original string is modified

• To avoid memory leaks

• To prevent the new string from being garbage collected

• To change the data type of the string

What does the trim method do to a string?

• Removes all spaces within the string

• Removes spaces only at the beginning and end

• Converts the string to lowercase

• Reverses the string

How can you find out what methods are available for a string in Java?

• By asking a colleague

• By consulting the API documentation

• By using trial and error

• By experimenting with different methods

What is unique about using the plus operator with strings in Java?

• It can only be used with numbers

• It appends or concatenates strings

• It multiplies the string

• It divides the string

What does the plus equals (+=) operator do when used with strings?

• It concatenates a string and assigns it back

• It divides one string by another

• It subtracts a string from another

• It reverses the string

What is the result of concatenating the strings 'Hello' and 'World' using the plus operator?

• WorldHello

• Hello World

• World Hello

• HelloWorld