Control Statements

Question 1

___ is an informal language that helps you develop algorithms without having to worry about the strict details of Java language syntax.

Answer 1

a) Pseudocode

Question 2

The process of executing the statements in a program one after the other in the order in which they’re written is called ___ .

Answer 2

b) sequential execution.

Question 3

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

Answer 3

c) sentinel, signal, flag or dummy

Question 4

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

Answer 4

d) strongly typed

Question 5

___ enable programs to perform statements repeatedly as long as a condition re- mains true.

Answer 5

e) Repetition statements

Question 6

a) The if statement is a double-selection statement.

Answer 6

a) False. It is a single-selection statement because it selects or ignores a single action

Question 7

b) Java provides the ternary operator(?:), which can be used in place of a do…while statement.

Answer 7

b) False. Java’s ternary operator (?:) cannot be used in place of an do…while statement.

Question 8

c) A nested control statement appears in the body of another control statement.

Answer 8

c) True.

Question 9

d) Specifying the order in which statements execute in a program is called program control.

Answer 9

d) True.

Question 10

e) A nonfatal logic error causes a program to fail and terminate prematurely.

Answer 10

e) False. A nonfatal logic error allows a program to continue executing but causes it to produce in- correct results.

Question 11

Typically, ___ statements are used for counter-controlled repetition and ___ statements for sentinel-controlled repetition.

Answer 11

a) for, while

Question 12

The do…while statement tests the loop-continuation condition ___ executing the loop’s body; therefore, the body always executes at least once.

Answer 12

b) after

Question 13

The ___ statement selects among multiple actions based on the possible values of an integer variable or expression.

Answer 13

c) switch

Question 14

The ___ operator can be used to ensure that two conditions are both true before choosing a certain path of execution.

Answer 14

d) continue

Question 15

If the loop-continuation condition in a for header is initially ___ , the program does not execute the for statement’s body.

Answer 15

e) && (conditional AND)

Question 16

a) The default case is required in the switch selection statement.

Answer 16

a) False. The default case is optional. If no default action is needed, then there’s no need for a default case

Question 17

b) The break statement is required in the last case of a switch selection statement.

Answer 17

b) False. The break statement is used to exit the switch statement. The break statement is not required for the last case in a switch statement

Question 18

c) The expression( ( x > y ) && ( a < b ) ) is true if either x > y is true or a < b is true.

Answer 18

c) False. Both of the relational expressions must be true for the entire expression to be true when using the && operator

Question 19

d) An expression containing the || operator is true if either or both of its operands are true.

Answer 19

d) True

Question 20

e) Listing cases consecutively with no statements between them enables the cases to perform the same set of statements.

Answer 20

e) True