Java Basics - Day 21 SQ

When we want to print in Java, we use the code ......

• system.out.print();
• System.out.println();
• System.Out.Printf();
• System.out.show();

A variable that holds a whole number

• String
• boolean
• int
• float

A variable that holds words

• String
• boolean
• int
• float

Suppose that addition and subtraction had higher precedence than multiplication and division. Then the expression:

2 + 3 * 12 / 7 - 4 + 8

would evaluate to which of the following?

• 11

• 12

• 5

• 9

• -4

Assume that a and b are integers. The boolean expression

!( a <= b) && (a * b > 0)

will always evaluate to true given that

• a = b

• a > b

• a < b

• a > b and b > 0

• a > b and b < 0

Consider the following code segment:

Line 1: int a = 10;

Line 2: double b = 10.7;

Line 3: double c = a + b;

Line 4: int d = a + c;

Line 5: System.out.println(c + " " + d);

What will be output as a result of executing the code segment?

• 20 20

• 20.0 30

• 20.7 31

• 20.7 30.7

• Nothing will be printed because of a compile-time error.

Consider the following code segment:

int var = 12;

var = var % 7;

var = var - 1;

System.out.println(var);

What is printed as a result of executing the code segment?

• 0

• 1

• 2

• 4

• 5

Assume that x, y, and z have been declared as follows:

boolean x = true;

boolean y = false;

boolean z = true;

Which of the following expressions evaluates to true?

• x && y && z

• x && y || z && y

• !(x && y) || z

• !(x || y) && z

• x && y || !z

Assume that a, b, and c have been declared and initialized with int values. The expression

!(a > b || b <= c)

is equivalent to which of the following?

• a > b && b <= c

• a <= b || b > c

• a <= b && b > c

• a < b || b >= c

• a < b && b >= c

Which primitive type is for floating point decimals?

• boolean

• char

• double

• long