Java Basics
Variables and Data Types
Expressions
Compound Assignments
Casting
100
String literals are enclosed by these special characters
"What are double quotes?"
100
A name associated with a memory location in the computer
What is a variable?
100
What is the final value of z?
What is 3?
100
This operator can be used to shortcut
x=x-1;
What is x--; or x-=1; ?
100
This operation will create a temporary value converted to a decimal number
What is (double)?
200
These methods are used by programs to display information to the computer monitor (or a console)
What are System.out.print() and System.out.println() ?
200
A value that a boolean variable can store
What is true or false?
200
What does the console display?
System.out.println(158 % 10);
What is 8?
200
What is the final value of x?
int x = 32;
x /= 6;
What is 5?
200
What does this output?
System.out.println((double) 1 / 3);
What is 0.33333?
300
This type of error is reported if the Java code is not correctly written.
What is a syntax error?
300
This type is used to declare a variable that is a real number.
What is a double?
300
What does the console display?
System.out.println(3 % 400);
What is 3?
300
What is the final value of x?
int x = 5;
x %= 10 * 2;
What is 5?
300
What does this output?
System.out.println((double) (1 / 3));
What is 0.0?
400
Every Java program starts with this.
A public class declaration
e.g. public class MyClass
400
The two types of variables in Java are primitive and this type
What is an object variable?
400
What does the console display?
System.out.println("The number is: " + 3 + 3);
What is "This number is: 33"?
400
The final value of x, y, and z
int x = 3;
int y = 5;
int z = 2;
x *= 4;
y -= 3;
z += y;
What is x = 12, y = 2, z = 4?
400
What the computer does when you perform integer division and part after the decimal point is thrown away.
What is truncate?
500
This program translates Java code into a class file that can be run on your computer.
What is a compiler?
500
Coding challenge
Write a line of code that creates a variable called ringsToRuleThemAll and sets it to the appropriate value.
int ringsToRuleThemAll = 1;
500
What does the console display?
What is 10.0?
500
The final value of x, y, and z
int x = 3;
int y = 5;
int z = 2;
x *= z * 2;
y /= y / 2;
z++;
What is x = 12, y = 2, z = 3?
500
The effect of performing this operation.
(int)(x + 0.5)
What is round to the nearest positive number?