CS 100 test 1 review

Data types

100

This data type is used to store a single variable.

What is char?

200

This is how many bytes a double occupies

What is 8

300

This is how many bytes a char occupies

What is 1

400

This is how to read in an integer n using scanf

scanf("%d", &n);

500

Given char word[12], this is the maximum number of (readable) characters the string can store.

11

Functions

100

This function is used to output statements.

What is printf?

200

Fill in the blank to read one character: scanf("___", &ch);

What is %c?

300

This is how you read in a string using scanf

scanf("%s", str);

400

This is the kind of variable type that does not require a % when reading in with scanf.

What is a string?

500

Explain why " %c" sometimes works better than "%c" when reading in a character right after an integer

What is because characters do weird stuff with whitespace and scanf might read in the space instead of the character

If Else Statements

100

int x = 7;
if (x > 5)
    printf("A");
else
    printf("B");

What is printed?

What is A

200

int x = 10;
if (x % 2 == 0 && x > 15)
    printf("A");
else
    printf("B");

This is printed.

What is A?

300

int x = 8;
if (x > 5)
{
    if (x < 10)
        printf("A");
    else
        printf("B");
}
else
{
    printf("C");
}

This is printed

What is A?

400

int x = 12;
if (x < 10)
{
    printf("A");
}
else if (x % 5 == 2)
{
    printf("B");
}
else
{
    printf("C");
}

This is printed.

What is B?

500

int x = 14;
int y = 5;
if (x > 10)
{
    if (x % y < 3)
    {
        y = y + 2;

        if (x / y == 2)
            printf("A");
        else
            printf("B");
    }
    else
    {
        printf("C");
    }
}
else
{
    printf("D");
}

What is C?

For and While Loops

100

for (int i = 0; i < 3; i++) { 

printf("Hi "); 

}

This is the amount of times "Hi " is printed.

3

200

for (int i = 1; i <= 5; i++)
{
    printf("%d ", i);
}

This is what's printed

What is 1 2 3 4 5 ?

300

int x = 1;
while (x < 10)
{
    x = x * 2;
}
printf("%d", x);

This is what's printed

What is 16?

400

int total = 0;
for (int i = 1; i <= 4; i++)
{
    total = total + i;
}
printf("%d", total);

This is what's printed

What is 10?

500

int x = 10;
while (x > 0)
{
    printf("%d ", x);
    x = x - 3;
}

This is what's printed

What is 10 7 4 1 ?

Printf statements

100

int x = 4;
printf("%d", x + 3);

What does it print

What is 7

200

char letter = 'G';
printf("%c", letter);

This is what it prints

What is G

300

int x = 7;
int y = 2;
printf("%d", x / y);

This is what it prints

What is 3

400

int x = 10;

int y = 2;

int z = 4;

printf("%d", x % z / y);

What does it print

What is 1

500

int total = 0;

for (int i = 1; i <= 5; i++)
{
    if (i % 2 == 0)
        total = total + i;
}

printf("%d", total);

This is what it prints

What is 6