Chapter 8

Any for loop can be replaced by an equivalent while loop.

• True
• False

Which of the following is NOT commonly used as a loop control variable name?

• i, j, k
• row, col
• count, pos
• inputLbl, outputLbl

Sometimes, a for loop’s “initialization” part may be empty, as in:

• True
• False

The condition of a while loop can always true as long as a break statement is included in the body of the loop as in this example:

• True
• False

What is the value of sum after the following code fragment is executed?

• 0
• 12
• 20
• 30

Sometimes, a for loop’s “change” part may be empty, as in:

• True
• False

What is the value of z after the following code fragment is executed?

• 0.0
• -0.2
• -0.4
• -2.0

What is the value of d after the following statement is executed?

• 1
• 10
• 1000
• unpredictable

What is displayed after the following code fragment is executed?

• 4! = 0
• 4! = 1
• 4! = 24
• Nothing: the program "hangs" in an infinite loop

In this example, why is it not a good idea to increment or otherwise change k in the body of the loop?

• Because the compiler would generate a “variable k may be not defined” warning
• Because the compiler would generate a “concurrent modification” error
• Because k may exceed limit in the middle of an iteration, and then the program will throw an exception
• Because such code may be hard to follow and may lead to bugs