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1. How does a programmer give a preprocessor directive?

a) By starting a line with the '//' sequence
b) By ending a line with the '*/' sequence
c) By starting the line with the '#' character
d) None of the above

2. What is the data type of the following expression:

7/3

a) Int
b) Float
c) Double
d) None of the above

3. What is the result of evaluating the following expression?

22/7. + 5/3

a) 4.142857...
b) 4.809523...
c) 5
d) None of the above

4. What is object code?

a) Incomplete machine code
b) Instructions typed in by the programmer
c) The result of the C preprocessor's operation
d) None of the above

5. To print a FLOAT with a field width of 10 and 2 digits to the right of the decimal point, what PRINTF format specifier should be used?

a) "%8.2lf"
b) "%10.2f"
c) "%12.2d"
d) None of the above

6. Which of these lists the products of a C compilation session in correct order?

a) Assembly code - Source code - Object code - Machine code
b) Machine code - Object code - Source code - Assembly code
c) Source code - Assembly code - Object code - Machine code
d) None of these

7. What will be in variable 'A' after executing the following code?

int a,b;

b = 24;
a = b++;

a) 24
b) 25
c) 23
d) None of the above

8. What are the objects in programming?

a) The computer's instructions
b) The data
c) The constants
d) None of the above

9. The instructions typed by a programmer that will be compiled and executed by the computer are called:

a) Source code
b) Machine code
c) Object code
d) None of the above

10. In order to solve a problem using a programming language, what must be done first?

a) Determine an algorithm that solves the problem
b) Write computer source code instructions
c) Define the problem
d) None of the above

11. For the code below to print the message "OK", what conditions are needed?

if (a<20) && (b == 25)
     printf("OK");

a) A must be more than 20, OR B must be equal to 25
b) Either A must be less than 20, OR B must be not equal to 25
c) A must be less than 20, AND B must be equal to 25
d) None of the above

12. Given that A=25 and B=10, what will the output of the fragment below be?

if (a<20)
     printf("Too Small.");
     else
     if (b >= 10)
         printf("Everything is OK.");
         else
         printf("B is too small.");

a) Too Small.
b) B is too small.
c) Everything is OK.
d) None of the above

13. When is a C expression considered to be 'true?'

a) When it is non-zero
b) When it is zero
c) Whenever it is not false
d) None of the above

14. In C, how is a logical OR indicated?

a) &&
b) ||
c) ++
d) None of the above

15. If A=2 upon entry into the code below, what will be output?

switch (a)
     {
     case 1: printf("Unlocking door.");
         break;

     case 2: printf("Checking back door.");
         break;

     case 3: printf("Locking door.");
         break;

     default: printf("Unknown command.");
         break;
     }

a) Checking back door
b) Unlocking door
c) Locking door
d) Unknown command

16. If A=1 upon entry into the code below, what will be output?

switch (a)
     {
     case 1: printf("TV is on.");

     case 2: printf("Stereo is on.");
         break;

     case 3: printf("Room lights dimmed.");
         break;

     default: printf("Say what?");
         break;
     }

a) TV is on.
b) TV is on. Stereo is on.
c) Room lights dimmed.
d) Say what?

17. What is the effect of a return statement within MAIN()?

a) The program starts over at the first statement in MAIN()
b) The program ends and control goes back to the operating system
c) The last executed instruction repeats
d) None of the above

18. A 'for' loop makes its test:

a) At the top of the loop
b) At the bottom of the loop
c) Either the top or the bottom of the loop, as the programmer desires
d) None of the above

19. What output will be produced by the DO loop below?

int i=0;

do  {
     i++;
     printf("%d", i);
     }
     while(i<5);

a) 1 2 3 4 5
b) 0 1 2 3 4
c) 0 1 2 3
d) None of the above

20. What will be the output of the following FOR loop?

for(i=0 ; i<5 ; i++)
     {
     if (i==2) continue;
     printf("%d", i);
     }

a) 1 2 3 4 5
b) 0 1 2 3 4
c) 0 1 3 4
d) None of the above

21. A 'for' loop is written as follows:

for(i=0 ; i<25 ; i++)
     printf("Testing %d\n", i);

What will the highest and lowest printed values of 'i' be?

a) 1 and 25
b) 0 and 26
c) 0 and 24
d) None of the above

22. What will be the output of the following FOR loop?

for(i=0 ; i<5 ; i++)
     {
     if (i==2) break;
     printf("%d", i);
     }

a) 0 1 2 3 4
b) 1 2 3 4 5
c) 1 3 4 5
d) None of the above

23. What output will be produced by the DO loop below?

int i=2;

do  {
     i++;
     if (i==7) continue;
     printf("%d", i);
     }
     while(i<10);

a) 3 4 5 6 7 8 9
b) 2 3 4 5 6 7 8
c) 3 4 5 6 8 9 10
d) None of the above

24. What is the default data type returned by C functions?

a) int
b) float
c) void
d) None of the above

25. When do C functions need to be prototyped in single-source-file projects?

a) Prototyping is always optional in C as long as a single file contains all the source code.
b) When functions are called before they are defined (i.e., function 'below' use in listing.)
c) Prototyping is always required, regardless of where the functions are used.
d) None of the above

26. A certain function is written as follows:

MyFunct(int x)
{
return(x * x);
}
What is the data type returned by this function?

a) char
b) int
c) float
d) None of the above

27. How many passes does the C compiler make through the source code?

a) 1
b) 2
c) 3
d) None of the above

28. What is wrong with the function below?

float MyFunct(int x, float z)
{
float x2;

x2 = z*z + x;
}

a) Function defined as type FLOAT but fails to return a value
b) A semicolon is required on the first line 'float MyFunct(int x, float z);'
c) The function is returning the wrong data type (INT)
d) None of the above

29. According to the way "MyFunct" is being used below, what is its prototype?

int x,y;
float z;
//
//Program logic to fill x and y with data here
//

z=MyFunct(x, y);

a) void MyFunct(int, int);
b) double MyFunct(double, int);
c) float MyFunct(int, int);
d) None of these

30. A certain function has the following prototype:

float MyFunct(int x, float z);

Which statement below correctly calls this function? Assume that A and B are type INT, and C is type FLOAT.

a) MyFunct( a, b);
b) a = MyFunct( 0, a);
c) c = MyFunct( a, 1.41459 );
d) None of the above

NOTE

When you take exam #1, you will also have to write some code. Make sure you know how to punctuate PRINTF statements, write IF-ELSE statements, write FOR/DO/WHILE loops, and work with functions and their prototypes.

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