C# Unit 5

A structure that allows repeated execution of a block of statements is a(n) ______.

A. sequence
B. array
C. selection
D. loop

The body of a while loop can consist of _______.

A. a single statement
B. a block of statements within curly
braces
C. either a or b
D. neither a nor b

A loop that never ends is called an _________ loop.

A. intermediate
B. interminable
C. infinite
D. indefinite

Which of the following is not required of a loop control variable in a correctly working loop?

A. It is initialized before the loop
B. It is altered in the loop body
C. It is tested
D. It is reset to its initial value before the loop ends

A while loop with an empty body contains no _________.

A. statements 
B. curly braces
C. test within the parentheses of the while statement
D. loop control variable

A loop for which you do not know the number of iterations when you write it is a(n) ________.

A. definite loop
B. counted loop
C. indefinite loop
D. for loop

What is the major advantage of using a for loop instead of a while loop?

A. With a for loop, it is impossible to create an infinite loop.
B. It is the only way to achieve an indefinite loop.
C. Unlike with a while loop, the execution of multiple statements can depend on the test condition.
D. The loop control variable is initialized, tested, and altered all in one place.

A for loop statement must contain _______.

A. five pipes
B. four dots
C. two semicolons
D. three commas

In a for statement, the section before the first semicolon executes ________.

A. once after each loop iteration
B. once
C. once prior to each loop iteration
D. one less time than the initial loop control variable value

The three sections of the for loop are most commonly used for _______ the loop control variable.

A. initializing, converting, and outputting
B. incrementing, selecting, and testing
C. testing, outputting, and incrementing 
D. initializing, testing, and incrementing

Which loop is most convenient to use if the loop body must always execute at least once?

A. an if loop
B. a while loop
C. a do loop
D. a for loop

The loop control variable is checked at the bottom of which kind of loop?

A. a while loop
B. a for loop
C. a do loop
D. all of the above

A for loop is an example of a(n) _______ loop.

A. untested
B. pretest
C. infinite
D. posttest

A while loop is an example of a(n) ______ loop.

A. pretest
B. posttest
C. infinite
D. untested

When a loop is placed within another loop, the loops are said to be ________.

A. bubbled
B. nested
C. overlapping
D. infinite

What does the following code segment display?

a = 1;
while (a < 5);
{
     Write("{0} ", a);
     ++a;
}

A. 1234
B. 1
C. 4
D. nothing

What is the output of the following code segment?

s=1;
while (s < 4)
    ++s;
    Write("{0} ", s);

A. 1
B. 1234
C. 4
D. 234

What is the output of the following code segment?

j = 5;
while (j > 0)
{
       Write("{0} ", j);
       j--;
}

A. 5
B. 543210
C. 54321
D. 0

What does the following code segment display?

for (f = 0; f < 3; ++f);
    Write("{0} ", f);

A. 012
B. 0
C. 3
D. nothing

What does the following code segment display?

for (t = 0; t < 3; ++t)
    Write("{0} ", t);

A. 01
B. 0
C. 0123
D. 012