Deck 3: Flow of Control

Question 1

A compound statement is enclosed between:
(a)[ ]
(b){ }
(c)( )
(d)< >

Answer 1

B

Question 2

The looping mechanism that always executes at least once is the _____________ statement.
(a)if…else
(b)do…while
(c)while
(d)for

Answer 2

B

Question 3

In a switch statement,the default case is always executed.

Answer 3

False

Question 4

To compare two strings lexicographically the String method ____________ should be used.
(a)equals
(b)equalsIgnoreCase
(c)compareTo
(d)==

Question 5

Common loop errors are:
(a)Off-by-one
(b)Infinite loops
(c)Both a and b
(d)None of the above

Question 6

An if-else statement chooses between two alternative statements based on the value of a Boolean expression.

Question 7

You may omit the else part of an if-else statement if no alternative action is required.

Question 8

When the number of repetitions are known in advance,you should use a ___________ statement.
(a)while
(b)do…while
(c)for
(d)None of the above

Question 9

An if selection statement executes if and only if:
(a)the Boolean condition evaluates to false.
(b)the Boolean condition evaluates to true.
(c)the Boolean condition is short-circuited.
(d)none of the above.

Question 10

A mixture of programming language and human language is known as:
(a)Algorithms
(b)Recipes
(c)Directions
(d)Pseudocode

Question 11

The ____________ operator has the highest precedence.
(a)*
(b)dot
(c)+=
(d)decrement

Question 12

The controlling expression for a switch statement includes all of the following types except:
(a)char
(b)int
(c)byte
(d)double

Question 13

In a switch statement,the choice of which branch to execute is determined by an expression given in parentheses after the keyword switch.

Question 14

When using a compound Boolean expression joined by an && (AND)in an if statement:
(a)Both expressions must evaluate to true for the statement to execute.
(b)The first expression must evaluate to true and the second expression must evaluate to false for the statement to execute.
(c)The first expression must evaluate to false and the second expression must evaluate to true for the statement to execute.
(d)Both expressions must evaluate to false for the statement to execute.

Question 15

The OR operator in Java is represented by:
(a)!
(b)&&
(c)| |
(d)None of the above

Question 16

A ___________ statement terminates the current iteration of a loop.
(a)Break
(b)Continue
(c)Switch
(d)Assert

Question 17

To terminate a program,use the Java statement:
(a)System.quit(0);
(b)System.end(0);
(c)System.abort(0);
(d)System.exit(0);

Question 18

A multi-way if-else statement
(a)allows you to choose one course of action.
(b)always executes the else statement.
(c)allows you to choose among alternative courses of action.
(d)executes all Boolean conditions that evaluate to true.

Question 19

The association of operands with operators is called ______________.
(a)assignment
(b)precedence
(c)binding
(d)lexicographic ordering

Question 20

The negation operator in Java is represented by:
(a)!
(b)&&
(c)| |
(d)None of the above

Question 21

What output will be produced by the following code?
public class SelectionStatements
{
public static void main(String[] args)
{
int number = 24;
if(number % 2 == 0)
System.out.print("The condition evaluated to true!");
else
System.out.print("The condition evaluated to false!");
}
}

Question 22

When choosing a sentinel value,you should choose a value that would never be encountered in the input of the program.

Question 23

The three expressions at the start of a for statement are separated by two commas.

Question 24

Name and describe three types of branching mechanisms and give an example of each.

Question 25

Evaluate the Boolean equation: !( ( 6 < 5)&& (4 < 3))

Question 26

Discuss the rules Java follows when evaluating expressions.

Question 27

Write Java code that uses a for statement to sum the numbers from 1 through 50.Display the total sum to the console.

Question 28

What is a sentinel value and how is it used?

Question 29

What is short-circuit evaluation of Boolean expressions?

Question 30

Write an if-else statement to compute the amount of shipping due on an online sale.If the cost of the purchase is less than $20,the shipping cost is $5.99.If the cost of the purchase over $20 and at most $65,the shipping cost is $10.99.If the cost of the purchase is over $65,the shipping cost is $15.99.

Question 31

What would be the output of the code in #1 if number was originally initialized to 25?

Question 32

Not including the break statements within a switch statement results in a syntax error.

Question 33

Write a multi-way if-else statement that evaluates a persons weight on the following criteria: A weight less than 115 pounds,output: Eat 5 banana splits! A weight between 116 pounds and 130 pounds,output: Eat a banana split! A weight between 131 pounds and 200 pounds,output: Perfect! A weight greater than 200 pounds,output: Plenty of banana splits have been consumed!

Question 34

An algorithm is a step-by-step method of solution.

Question 35

Write Java code that uses a while loop to print even numbers from 2 through 10.

Question 36

The equality operator (==)may be used to test if two string objects contain the same value.

Question 37

An empty statement is defined as a loop that runs forever.

Question 38

The for statement,do…while statement and while statement are examples of branching mechanisms.

Question 39

Boolean expressions are used to control branch and loop statements.

Question 40

Write Java code that uses a do…while loop that prints even numbers from 2 through 10.

Question 41

What is the output of the following code segment?
public static void main(String[] args)
{
int x = 5;
System.out.println("The value of x is:" + x);
while(x > 0)
{
x++;
}
System.out.println("The value of x is:" + x);
}

Question 42

Discuss the differences between the break and the continue statements when used in looping mechanisms.

Question 43

Write a complete Java program that prompts the user for a series of numbers to determine the smallest value entered.Before the program terminates,display the smallest value.