Java Chapter 4

Front 1

All programs can be written in terms of three types of control structures:

Back 1

sequence, selection, repetition

Front 2

The ___ statement is used to execute one action when a condition is true and another when that condition is false.

Back 2

if/else

Front 3

Repeating a set of instructions a specific number of times is called ___ repetition.

Back 3

counter-controlled

Front 4

When it is not known in advance how many times a set of statements will be repeated, a ___ value can be used to terminate the repetition.

Back 4

sentinal, signal, flag, dummy

Front 5

The ___ structure is built into Java; by default, statements execute in the order they appear.

Back 5

sequence

Front 6

Instance variables of type char, byte, short, int, long, float, and double are all given the value ___ by default.

Back 6

0

Front 7

Java is a ___ ___ language; it requires all variables to have a type.

Back 7

strongly typed

Front 8

If the increment operator is ___ to a variable, first the variable is incremented by 1, then its new value is used in the expression.

Back 8

prefixed

Front 9

T/F An algorithm is a procedure for solving a problem in terms of the actions to execute and the order in which they execute.

Back 9

t

Front 10

T/F A set of statements contained within a pair of parentheses is called a block.

Back 10

f

Front 11

T/F A selection statement specifies that an action is to be repeated while some condition remains true.

Back 11

f

Front 12

T/F A nested control statement appears in the body of another control statement.

Back 12

t

Front 13

T/F Java provides the arithmetic compound assignment operators +=, -=, *=, and %= for abbreviating assignment expressions.

Back 13

t

Front 14

T/F The primitive types (boolean, char, byte, short, int, long, float and double) are portable across only Windows platforms.

Back 14

f

Front 15

T/F Specifying the order in which statements execute in a program is called program control.

Back 15

t

Front 16

T/F The unary cast operator (double) creates a temporary integer copy of its operand.

Back 16

f

Front 17

T/F Instance variables of type boolean are given the value true by default.

Back 17

f

Front 18

T/F Pseudocode helps you think out a program before attempting to write it in a programming language.

Back 18

t

Front 19

Write down four different Java statements that each add 1 to integer variable x.

Back 19

x = x + 1; x += 1; ++x; x++;

Front 20

Write one statement to assign the sum of x and y to z, then increment x by 1.

Back 20

z = y + x++;

Front 21

Write a java statement that performs the following: Test whether variable count is greater than 10. If it is, print “Count is greater than 10”.

Back 21

if(count > 10) outputln(“Count is greater than 10”);

Front 22

Write a single java statement to decrement the variable x by 1, then subtract it from variable total and store the result in variable total.

Back 22

total = total - --x;

Front 23

Write a java statement to calculate the remainder after q is divided by divisor, and assign the result to q. Write this statement in two different ways.

Back 23

q = q % divisor; q %= divisor;

Front 24

Declare variable sum of type int and initialize it to 0.

Back 24

int sum = 0;

Hint 24

int x = 1; Add variable x to variable sum, and assign the result to variable sum.

Front 25

Declare variable x of type int and initialize it to 1.

Back 25

int x = 1;

Front 26

Add variable x to variable sum, and assign the result to variable sum.

Back 26

sum = sum + x;

Front 27

Print “The sum is:”, followed by the value of variable sum.

Back 27

println(String.format(“The sum is: %d”, sum));

Front 28

Write a run-able java application that calculates and prints the sum of the integers from 1 to 10. Use a while statement to loop through the calculation and increment statements. The loop should terminate when the value of the counter becomes 11. Note: use the space bar to properly indent your code. Begin your code with the line public class Calculate.

Back 28

public class Calculate

{

public static void main(String[] args)

{

int counter = 1;

while(counter <= 10)

{

sum = sum + counter;

counter++;

}

System.out.println(sum);

} // end main

} // end class

Front 29

Given that product and x are equal to 5 what will be the values of product and x after the following statement is executed. product=product*x++; After this statement is executed what is the value of product? What is the value of x?

Back 29

25, 6

Front 30

What is the error in the following code: while(c <= 5) {product *=c; ++c;

Back 30

no }

Front 31

What is the error in the following code: if(gender == 1) System.out.println(“Woman”); else; System.out.println(“Man”);

Back 31

shouldn’t be ; after else

Front 32

What is wrong with the following while statement? while (z >= 0) sum +=z;

Back 32

This is an endless loop where z never gets changed.