CMP128 Java Ch. 04 Loops Pt. 2
Flashcard
•
Computers
•
University
•
Practice Problem
•
Hard
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10 questions
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1.
FLASHCARD QUESTION
Front
Which looping construct is illustrated below?
for (int i=0; i<5; i++)
{
System.out.println ("The square of " + i + " is: " + (i*i));
}
Back
A count-controlled quantifiable pre-test loop
2.
FLASHCARD QUESTION
Front
Which looping construct is illustrated below?
int num = 1;
char keepSquaring = 'Y';
do
{
System.out.println ("The square of " + num + " is: " + (num*num) + "\n");
num++;
System.out.print("Would you like to square another number? (Y/N): ");
keepSquaring = keyboard.nextLine().charAt(0);
}
while (keepSquaring == 'Y' || keepSquaring == 'y');
Back
Event-driven qualifiable Post-Test Loop
3.
FLASHCARD QUESTION
Front
Which looping construct is illustrated below?
int num = 1;
char keepSquaring = 'Y';
while (keepSquaring == 'Y' || keepSquaring == 'y')
{
System.out.println ("The square of " + num + " is: " + (num*num) + "\n");
num++;
System.out.print("Would you like to square another number? (Y/N): ");
keepSquaring = keyboard.nextLine().charAt(0);
}
Back
Event-driven qualifiable Pre-Test Loop
4.
FLASHCARD QUESTION
Front
What is wrong with the following loop?
int num = 1;
char keepSquaring = 'Y';
while (keepSquaring == 'Y' || keepSquaring == 'y')
{
System.out.println ("The square of " + num + " is: " + (num*num) + "\n");
num++;
Back
It is missing an update statement, so the loop is infinite.
5.
FLASHCARD QUESTION
Front
What is wrong with the following loop?
for (int i=0; i>5; i++)
{
System.out.println ("The square of " + i + " is: " + (i*i) + "\n");
}
Back
This loop will never execute the loop body because the counter variable starts at 0 and immediately fails the test of >5.
6.
FLASHCARD QUESTION
Front
What is wrong with the following loop?
for (int i=10; i>0; i++)
{
System.out.println ("The square of " + i + " is: " + (i*i) + "\n");
}
Back
It creates an infinite loop because i will never be less than or equal to 0.
7.
FLASHCARD QUESTION
Front
What is wrong with the following looping structure?
for (int i=0; i<5; i++)
{
System.out.println ("The square of " + i + " is: " + (i*i) + "\n");
}
Back
Nothing. It is perfect.
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