COMP122 Practice Final Exam

Instructions: There are 50 questions on this test. It is written in a style very similar to the REAL final exam. Choose the best answer from among those given. Click the GRADE button on the bottom of the form when you want the exam graded.

Note: You can practice this test as many times as you desire; the system will cook you up a fresh batch of questions each time you access this page.

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1. 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

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

22/7. + 3.14

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

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

7/3

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

4. What library function should be used to compare character string arrays?

a) strcat
b) strlen
c) strcmp
d) None of these

5. What is wrong with the following code?

char szPassword[24];
gets(szPassword); // Get user password

if ( szPassword == "Joshua" ) printf("Welcome!");

a) The comparison method (==) will not work with strings.
b) GETS() does not input character strings.
c) The array declaration is invalid.
d) None of these

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

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

7. What information must be passed to the STRCPY() library routine?

a) The length of each string, and the address of each string.
b) The address of each string.
c) The length of one of the strings.
d) None of these

8. What is something that can not be done with a VOID pointer?

a) Dereferencing
b) Assignment of pointer value
c) Type-casting pointer contents to another type
d) None of these

9. Given the declarations:

char szData[64];
int i;

i=314;

Supposed that we wish to place a text message into szData that shows the value in variable i. Which of the statements below would accomplish this?

a) strcpy( szData , "i = %d", i);
b) sprintf( szData , "i = %d" , i );
c) strcat( szData , i , "i = %d" );
d) None of these

10. What type of data must be in variable A below?

printf("A = %d now.\n", a );

a) int
b) char
c) float
d) double

11. 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

12. 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

13. 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

14. In C, a logical AND is indicated by what operator?

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

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

int a,b;

b = 24;
a = ++b + 10;

a) 34
b) 35
c) 33
d) None of the above

16. Given the following declaration:

int Values[25];

Which expression below is equivalent to: &Values[0]?

a) Values[0]
b) Values[-1]
c) Values
d) None of these

17. 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

18. 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

19. Given the following declaration:

int Values[4]={1,2,3,4};

What value will be returned if the expression "*(Values+2)" is evaluated?

a) 2
b) 1
c) 3
d) Insufficient information given to solve problem.

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

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

MyFunct(x, y);

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

21. 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

22. Which of these lists the fundamental data types of the C language in correct order of precision?

a) INT - CHAR - FLOAT - LONG INT - DOUBLE
b) INT - CHAR - DOUBLE - LONG INT - FLOAT
c) FLOAT - CHAR - INT - LONG INT - DOUBLE
d) CHAR - INT - LONG INT - FLOAT - DOUBLE
e) None of the above

23. What is special about the NULL pointer value?

a) The NULL pointer automatically dereferences the target object.
b) Arrays can only be accessed if a NULL pointer is used.
c) The NULL pointer is obtained when a disk I/O error occurs.
d) None of these

24. The data being manipulated by a program is also known as:

a) The objects
b) The algorithm
c) The flow
d) None of the above

25. What character code is used to end all strings in C?

a) '\n'
b) '\0'
c) '\7'
d) None of these

26. 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

27. Which declaration below would be correct to make "pVar" a pointer to int type?

a) int pVar;
b) int* pVar;
c) int &pVar;
d) None of these

28. What will the output of the following code be?

double Zeta; // Holds ratio of alpha/w(nat)

Zeta = 0.707107; // Less than critically damped system
printf("Damping ratio = %10.1lf\n", Zeta );

a) Damping ratio = 0.707107
b) Damping ratio = 0.707
c) Damping ratio = 0.7
d) None of these

29. 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

30. 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

31. What must be done with any objects created through the 'NEW' operator prior to termination of a program?

a) The objects must be tested to see if they hold proper values
b) The objects must be tested with the 'OLD' operator
c) The objects must be deleted from memory
d) None of the above

32. Which statement below would correctly allocate an array of 500 integers by using the 'NEW' operator?

a) int* Array = new int[500];
b) new int Array[500];
c) Array[500] = new int;
d) None of the above

33. Which standard stream below could be used to talk to the video display?

a) stdprn
b) stderr
c) stdout
d) stdaux
e) None of the above

34. Which stream below is normally associated with the keyboard?

a) stdout
b) stderr
c) stdprn
d) stdaux
e) None of the above

35. Given the following declaration:

struct Complex
    {
    double re;
    double im;
    };

If a DOUBLE uses 8 memory locations, how much memory is used up?

a) 8 locations
b) 16 locations
c) 0 locations
d) None of these

36. Which of these is a disadvantage of Stroked (Vector) fonts?

a) A large amount of memory is required
b) Only one color of text can be displayed
c) Rendering is a complex and slow process
d) None of the above

37. Given the following declaration:

struct Complex
    {
    double re;
    double im;
    };


double GetMagnitude(Complex* lpStr)
{
//...
}

To access the member 're' within the function, what notation would be used?

a) lpStr->re
b) lpStr.re
c) re
d) None of the above

38. What happens when an object is instantiated?

a) The object is deleted or removed from memory
b) A pointer to the object is created
c) The object is dereferenced
d) None of these

39. Which type of font below looks best when shown at different magnification levels on a video screen?

a) Bit-mapped
b) Imaginary
c) Stroked (Vector)
d) None of the above

40. What is a structure?

a) A user-defined data type that can contains aggregate data
b) A special type of C pointer that can not be dereferenced directly
c) Another name for a C program
d) None of these

41. Why is it important to open a file in the binary mode when reading and writing in-memory contents such as structures?

a) To avoid undesired translation of certain memory content values
b) To allow automatic error checking of the file contents by the operating system
c) To minimize disk space requirements
d) None of the above

42. What is a stream?

a) A path of communication between a program and the operating system
b) A method for writing to the video screen
c) A method for checking the contents of variables
d) None of the above

43. In the Borland Graphic Interface, the coordinates (0,0) represent what?

a) The ULH corner of the video display
b) The URH corner of the video display
c) The center of the video display
d) None of the above

44. What must be done with open files prior to ending a program?

a) Close them
b) Write the final information into them
c) Check their contents
d) None of the above

45. What value is returned by the NEW operator when a memory allocation request fails?

a) -1
b) NULL pointer
c) 0xffff
d) None of the above

46. What two pieces of information are needed by 'FOPEN()' ?

a) A drive letter and file mode specifier
b) A filename and file mode specifier
c) A file mode specifier and system password
d) None of the above

47. Which operator is used to access the member elements of a structure?

a) "*"
b) "."
c) "&"
d) None of these

48. The pointer value obtained from the 'FOPEN()' function (when used to open a disk file) is often referred to by programmers as a/an:

a) Array
b) Structure
c) Handle
d) None of the above

49. Which standard stream below could be used to talk to a printer?

a) stdout
b) stdprn
c) stderr
d) stdaux
e) None of the above

50. Which standard library function below is used to move the file position indicator when implementing a random-access binary file system?

a) fopen()
b) fseek()
c) fputs()
d) None of the above

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