CCSB163 Final - Mar 2007.pdf - MetaLab - Universiti Tenaga Nasional

UNIVERSITI TENAGA NASIONAL
College of Information Technology
BACHELOR OF INFORMATION TECHNOLOGY (HONS.)
BACHELOR OF COMPUTER SCIENCE (HONS.)
BACHELOR OF MECHANICAL ENGINEERING (HONS.)
FINAL EXAMINATION
SEMESTER II 2006/2007
PRINCIPLES OF PROGRAMMING
(CCSB163/CSEB113)
April 2007
Time allowed: 3 hours + 10 minutes for reading
INSTRUCTIONS TO CANDIDATES
1. The total marks for this exam is 100 marks.
2. There are THREE (3) SECTIONS to this paper: Section A, Section B, and Section C.
3. Answer ALL questions in the answer booklet provided.
DO NOT OPEN THIS QUESTION PAPER UNTIL YOU ARE INSTRUCTED TO DO SO
THIS QUESTION PAPER CONSISTS OF 11 PRINTED PAGES INCLUDING THIS PAGE

SECTION A: MULTIPLE-CHOICE (20 QUESTIONS, 30 MARKS)
Instruction: Please select the BEST answer from the given choices.
1. What the following program would display
(The symbol '#' stands for one blank character.)
int main(void)
{
double a, b;
a = 11.56;
b = 101.117;
printf("Is it%6.1f%9.4f", a, b);
printf("\n");
return (0);
}
(a)
(b)
(c)
(d)
Is#it##11.6#101.1170\n
Is#it##11.6#101.1170
Is#it##11.5#101.1170
Is#it##11.6#101.117\n
2. Every statement in C must end with a
(a) period (.)
(b) backslash (/)
(c) colon (:)
(d) semicolon (;)
3. Which of the following is not a VALID escape sequence
(a) \~
(b) \\
(c) \n
(d) \”
4. Which of the following is an INVALID identifier (variable name)
(a) _Marks
(b) MaRK
(c) 5MARKS
(d) MARKS5
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5. Using the following function definition, the parameter list is represented by
X Y( Z ) {
D
}
(a)
(b)
(c)
(d)
X
Y
Z
D
6. Which of the types listed below can be the type of the result value returned by
a user-defined function
(a) int
(b) double
(c) char
(d) all of the above
7. What will be the value of variable i after the C statements below have been
executed
i = 2;
j = 10;
if ((3 * i) < j)
i = i + 2;
i = i + 3;
(a) 5
(b) 6
(c) 7
(d) 10
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8. What is the output from the following C program fragment if the value of
variable input is 0
switch (input) {
case 0:
case 1:
printf("Cat ");
case 2:
printf("Dog");
break;
case 3:
printf("Cow");
case 4:
printf("Coyote");
}
printf("\n");
(a)
(b)
(c)
(d)
Cow
CatDog
Dog
Cat
9. What is wrong with the following while loop
(a)
While should be written as while.
(b) Braces are required around sum = sum +30;.
(c)
While (sum

11. What is the final value of x after performing the following operations
int x = 31;
double y = 9;
double z = 14;
y = x / z;
x = 5.5 * y;
(a) 12.18
(b) 11
(c) 12
(d) 11.5
12. Which of the following is not specified by the for loop below
for ( c = 1; c

15. Which statement is true regarding the statement below:
++frequency[ responses[ answer ] ];
(a)
(b)
(c)
(d)
This statement increases the appropriate frequency counter depending
on the value of responses[ answer ].
This statement increases the appropriate answer counter depending on
the value of frequency[ responses ].
This statement increases the appropriate responses counter depending
on the value of frequency[ answer ].
This statement produces a syntax error because subscripts cannot be
nested.
16. Which statement is FALSE
(a) In declaring an array, the size can be a constant or variable.
(b) Index used to access an array can be a constant or variable.
(c) The index of the first element of an array is always 0.
(d) The name of an array is actually the address of the first element of the
array.
17. What value is returned by the following call to strlen
strlen("computer")
(a) 7
(b) 8
(c) 9
(d) 10
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18. In the fragment below, what is the minimum size of result required for
successful and valid concatenation of "double" and "trouble"
strcpy(result, "double");
strcat(result, "trouble");
(a) 11
(b) 12
(c) 14
(d) 15
19. Which of the following correctly copies the contents of string2 into
string1 Assume that string2 is equal to "Good" and string1 is
equal to "Morning"
(a) strcat( string1, string2 );
(b) strcpy( string2, string1, 7 );
(c) strncpy( string1, string2, 6 );
(d) strcpy( string1, string2 );
20. Which statement is FALSE
(a) Function strcpy copies its first argument into its second argument.
(b) Function strncpy does not necessarily copy the terminating null
character of its second argument.
(c) A common error is not appending a terminating null character to the
first argument of a strncpy when the third argument is less than or
equal to the length of the string in the second argument.
(d) The first character of the second argument of strcat replaces the
null character that terminates the string in the first argument.
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SECTION B: SHORT ANSWERS (5 QUESTIONS, 40 MARKS)
Instruction: Please answer ALL the questions. DO NOT show any working
unless stated by the question.
s
Question 1
(a)
Rewrite the following code using code fragment using switch statement:
if (ch == 'E' || ch =='e')
countE++;
else if (ch == 'A' || ch == 'a')
countA++;
else if (ch == 'I' || ch == 'I')
countI++;
else
printf("Error –Not A,E, or I\n");
[5 marks]
(b)
If originally x=0, y=0, and z=0, what is the value of x, y, and z after
executing the following code
if (x)
if (y)
if(z)
z=3;
else
z=2;
[3 marks]
Question 2
(a) Declare a void function named my_func with ONE (1) parameter of type float
[2 marks]
(b)
Briefly describe the difference between a GLOBAL variable and a LOCAL
variable.
[2 marks]
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(c)
(d)
Briefly describe the difference between local variable with and without
STATIC storage.
[2 marks]
Trace and write the output for the program below:
#include
int m=12;
int f(int a,int b,int c);
void main(void)
{
int n=30;
int x=1,y=2,z=3,i;
printf("Before: m=%d, n=%d, x=%d\n",m,n,x);
i=f(x,y,z);
}
printf("After: m=%d, n=%d, x=%d\n", m,n,x);
int f(int a,int b,int c)
{
int n=100;
printf("In function f: n=%d, m=%d, a=%d\n",n,m,a);
m=999;
if (a >=1)
{
a+=b+m+n;
printf("modified: n=%d, m=%d, a=%d\n",n,m,a);
}
}
return a;
[6 marks]
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Question 3
(a) Change program fragment below from do–while loop to the equivalent while
loop.
x = 0;
do{
printf(“%d\n”, x);
x++;
}while(x < 100);
[4 marks]
(b) Write a C program fragment using for loop to calculate x y (x to the power of y)
where x and y are variables.
(e)
[5 marks]
Write a C program fragment using nested for loops to produce the diagram
below
Question 4
BBBBBBBBB
BBBBBBB
BBBBB
BBB
B
[6 marks]
The function chr2val below is supposed to return the equivalent integer value of
the character in input_digit if it is a valid digit character. Otherwise, it will
return -1. Fill up the FIVE blanks accordingly
________ chr2val (char input_digit)
{
}
if (________ && ________)
else
return ________;
return ________;
[5 marks]
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SECTION C: DESIGNING/ PROGRAMMING (2 QUESTIONS, 30 MARKS)
Instruction: Please answer ALL the questions.
Question 1
A series of numbers are as follow:
1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89…
Observe that all the numbers in this series EXCEPT the first and second are the sum
of their previous two numbers.
Design a program using pseudocode to display the nth number in this series where n is
user input variable. Example, if user enters 6, the output is the 6th number of the
series which is 8. If user enters any numbers less than 1, the program should display
“Invalid input of n!”
Example 1: Example 2:
Enter n: 6
The 6th number of the series is 8
Enter n: 0
Invalid input of n!
[15 marks]
Question 2
Write a complete C program to solve the following problem.
Get a list of POSITIVE INTEGER (including 0) from user and store in an ARRAY.
Read in ONE integer at a time. User needs to enter ANY NEGATIVE INTEGER to
indicate end of the list. Next, the program should determine if the list of integers
entered is sorted in increasing order, decreasing order or is unordered. You may
ASSUME that the maximum number of integers user would enter is 10.
Example 1: Example 2: Example 3:
Enter integer no.1 : 1
Enter integer no.2 : 3
Enter integer no.3 : 4
Enter integer no.4 : -4
Increasing order
Enter integer no.1 : 9
Enter integer no.2 : 5
Enter integer no.3 : 2
Enter integer no.4 : -1
Decreasing order
Enter integer no.1 : 6
Enter integer no.2 : 3
Enter integer no.3 : 5
Enter integer no.4 : -2
Unsorted
[15 marks]
---End of Questions---
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