Variables

Question 1

What are primitive data types?

Answer 1

Types of data built into the Java system

Question 2

What are the 3 main primitive data types?

Answer 2

int (integer), double, boolean

Question 3

What is an int data type?

Answer 3

int (integer) is a primitive data type that holds positive numbers, negative numbers and zero

Question 4

Which data type holds decimals?

Answer 4

the double data type can hold decimals as well as large/small numbers

Question 5

What is a boolean?

Answer 5

A primitive data type that references one of two values; either true or false

Question 6

Which data type holds single characters?

Answer 6

char (character); will hold any character like a letter, space or punctuation mark.

Surrounded by single quotes (' ')

Question 7

What is a String literal?

Answer 7

Any sequence of characters enclosed in double-quotes

Question 8

How do you add quotation marks to a String value?

Answer 8

The \" escape sequence

example: System.out.println("\"Hello World\"");
Prints: “Hello World”

Question 9

What does the the \\ escape sequence do?

Answer 9

Allows us to place a backslash in our String text
example: System.out.println("This is a backslash symbol: \\");

Prints: This is a backslash symbol: \

Question 10

What escape sequence do we use to print a new line of text?

Answer 10

/n

Ex: System.out.println("Hello/nGoodbye)";
Prints:
Hello
Goodbye

Question 11

What are static checks used for?

Answer 11

To help catch bugs during programming rather than during the execution of code