Java Basics #2

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:

Line 1: int a = 10;

Line 2: double b = 10.7;

Line 3: int d = a + b;

Line 3 will not compile in the code segment above. With which of the following statements could we replace this line so that is compiles?

I. int d = (int) a + b;

II. int d = (int) (a + b);

III. int d = a + (int) b;

• I

• II

• III

• I and III

• II and III

Consider the following code segment:

Line 1: int a = 11;

Line 2: int b = 4;

Line 3: double x = 11;

Line 4: double y = 4;

Line 5: System.out.print(a / b);

Line 6: System.out.print(", ");

Line 7: System.out.print(x / y);

Line 8: System.out.print(", ");

Line 9: System.out.print(a / y);

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

• 3, 2.75, 3

• 3, 2.75, 2.75

• 2, 3, 2

• 2, 2,75, 2.75

• 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

Consider the following code segment:

int count = 5;

double multiplier = 2.5;

int answer = (int)(count * multiplier);

answer = (answer * count) % 10;

System.out.println(answer);

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

• 0

• 2.5

• 6

• 12.5

• 60

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

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