Midterm

Question 1

What is the value of i and j?

i = 2;
j = 1;

while (( i>-5) || (j - - > 0){
if ( (j%2) && (i - - % 3))
  printf ("%d", j);
else
  printf ("%d\n", i);
}
return 0;
}

Answer 1

2 > -5 = true, so move to next step
j (1)%2 = true & 2 - - %3 = true

then starts over

1 > -5 = true
j (1)%2 = true & 2 - - %3 = true

-keeps working remainder through until remainder is false (0) and then prints.

Answer:
11 -1
11 -4
1 -5

Question 2

How to write a program to clear the buffer

Answer 2

while (get char ( ) != ‘\n’)

Question 3

What does ? : mean?

Answer 3

? = if
\: = else

Question 4

x = 0;

y (x>0) ? 10 : -10

Answer 4

answer 10

Question 5

What is x?

x = 10 y = 0
y > 10) && (x - - >10

Answer 5

answer 10

Question 6

What is x?

x = 10 y = 10
y > 10) || (x - - >10

Answer 6

answer 10

Question 7

How to check if a char variable is an uppdercase letter?

Answer 7

((ch >= ‘A’) && (ch

Question 8

How many times will this print?
int count = 0;
do {
  printf (Welcome)
    }
while ++count

Answer 8

answer 10

Question 9

How many iterations (executions) in the loop?
int;
for (i = 1; i

Answer 9

answer n

Question 10

int even = 0;

printf (“%d, even ? “true” : “false”)

Answer 10

answer false

Question 11

How many times will this print?
int count = 0;
do
{
printf ("Welcome");
} while (count++

Answer 11

answer 10

Question 12

Which code is preferred?
code 1: if (number%2 = = 0)
  even = 1;
else
  even = 0;

code 2: even = (number %2 = = 0) ? 1:0

code 3: even = number % 2 = = 0);

Answer 12

answer = all three are correct but code 3 is preferred.

Question 13

How to clear the buffer?

Answer 13

fflush (stdin)

Question 14

How to deallocate memory in a dynamic array?

Answer 14

free ( (void *) d_ptr );

Question 15

How can memory in an array be allocated?

Answer 15

malloc ( )

Question 16

What is an address operator? (array)

Answer 16

& gives the address of a variable

Question 17

What is the dereferencing operator? (array)

Answer 17

• used with an address, gives the contents of that address

Question 18

What is the sizeof ( ) operator used for in an array?

Answer 18

Used with an array to return the number of bytes in that array

Question 19

How to deallocate memory in a dynamic array?

Answer 19

free ( (void *) d_ptr ); or free ( )

Question 20

What can be used as a function declaration of an array?

Answer 20

funct ( int *array)

funct ( int array [ ] )

Question 21

What can be used as a function call for an array?

Answer 21

int array [ 50]

funct (array);

Question 22

The name of an array without any brackets will give the address of which cell?

Answer 22

The first cell

Question 23

In an array, what does setting a pointer to NULL do?

Answer 23

Indicates that it doesn’t point anywhere

Question 24

How many bytes does a floating point value use in array?

Answer 24

4 bytes. An 8 element array will use 32 bytes

Question 25

What type of values can and cannot be used with a switch statement?

Answer 25

Cannot = float or double
Can = integer or character