Topic 2.6 Video 1

What is a string literal?

• A string literal is a numeric value used to represent text in programming languages.
• A string literal is a keyword used to represent text in programming languages.
• A string literal is a sequence of characters enclosed in quotation marks, used to represent text in programming languages.
• A string literal is a special character used to represent text in programming languages.

Which of the following will instantiate a String object and assign it to a variable?

• String str = new String("Hello");

• str = "Hello";

• str = new String("Hello");

• String str = "Hello";

What is meant by the statement that Strings are immutable?

• Strings are always mutable
• Strings can only be changed once
• Strings can be modified multiple times
• Strings cannot be changed after they are created.

What is the output by the code below?

 

System.out.println( 3 + " " + 3 );

• 6

• 3 3

• 6 6

• 3" "3

• 3

What is the output?

System.out.println( 3 + 6 + "Hello" );

• Hello9
• 36Hello

• 3+6Hello

• 9Hello