C1S170 Week 3 Sample Quiz in C# – 35/35 marks

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Problem Statement

1. Question : (TCO 5) When writing a program, if you know exactly how many times statements in a loop should execute, use the _____ structure.

do while

for

goto

while

2. Question : (TCO 5) When used within a loop structure, the _____ statement causes execution to jump out of the loop and proceed with subsequent statements in the program.

break

continue

goto

jump

3. Question : (TCO 5) A _____ looping structure, such as WHILE, performs its conditional expression _____ its contents execute.

posttest, after

pretest, before

posttest, while

pretest, while

4. Question : (TCO 10) During a code walk-through, someone may suggest that this code be replaced with _____, as it is more efficient.

int val = 0;
while (val < 10)
{
Console.WriteLine(val);
val++;
}

for(int val = 0; val < 10; val++)
{
Console.WriteLine(val);
}

for(int val = 0; val <= 10; val++)
{
Console.WriteLine(val);
}

for(int val = 0; val < 10; val--)
{
Console.WriteLine(val);
}

int val = 0;
do while (val < 10)
{
Console.WriteLine(val);
val++;
}

5. Question : (TCO 5) A block of statements within the body of a FOR loop must be surrounded with _____.

curly braces {}

parentheses ()

square brackets []

None of the above

6. Question : (TCO 5) What output will this set of statements produce?

int a = 1;
while (a < 1)
{
Console.Write("{0}\t", a);
a++;
}
Console.Write("{0}\t", a);

An infinite loop

An exception

1

1 1

7. Question : (TCO 5) In this code, the variable _____ is a counter and the variable _____ is an accumulator.

double total = 0, weight = 2.0, limit =10, max = 50;
int track = 0;
for (int num = 0; num <= limit; num++ )
{
total = total + weight * num;
if (total <= max)
track++;
}

num, track

total, track

track, total

weight, limit

8. Question : (TCO 5) In this code, the inner FOR loop _____.

int i = 1, j = 1;
for (i = 1; i < 4; i++)
{
for (j = 1; j < 4; j++)
{
Console.Write("{0}{1} ", i, j);
}
}

contains a syntax error

is nested

executes three times

executes four times

9. Question : (TCO 5) Your program keeps asking for last names from the user until he/she enters “####.” In this context, the “####” is used as a(n) _____.

accumulator

counter

sentinel value

test value

10. Question : (TCO 10) Which of the following are best programming practices?

Indenting the statements in the body of each control structure

Nesting multiple repetition structures

Including comments to describe its functionality

Always using descriptive variable, method, and program names

All of the above

11. Question : (TCO 5) Using a WHILE loop, write the C# code required to print every 2nd integer from 1 to 201 (i.e., 1, 3, 5, 7, etc.). Print each number on its own line.

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