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Higher Computing Exam past paper

COMP

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as in year 2006 final exam

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Family Name:

Other Names:

Signature:

Student Number:

This PAPER is NOT to be retained by the STUDENT

The University Of New South Wales

C0MP1911 Final Exam

1337 Computing 1

July 2006

Time allowed: 3 hrs

Total number of questions: 22

Total number of marks: 105

You are permitted one A4 sheet of information.

You must hand in this entire exam paper, your information sheet, and the answer booklets.

otherwise you will get zero marks for the exam and a possible charge of academic misconduct.

Ensure that you ﬁll in all of the details on the front of the info sheet, this pink paper, and the

3 answer booklets, and then SIGN everything. Mark one booklet PART C, one PART D, and

one WORKING ONLY. The working only booklet will not be marked.

Do not use red pen or pencil in this exam. Unless advised otherwise you may not use any

language features or library functions not covered in class. Answers w hich do not c omply with

the course style guide or which introduc e potential security vulnerabilities will b e penalised.

There are two marks for following the examination instructions.

Examiners’ Use Only

Inst A 12 13 14 15 16 C D Total

Part A: Multiple Choice Questions

Answer the questions in this part by circling the correct answer.

For each correct answer you earn 3 marks. There is no penalty for incorrect answers.

Question 1

Which of the following would be the best name for a function to compute the area of a triangle,

deﬁned in a ﬁle called Triangle.c entirely devoted to calculating the properties of triangles? The

function is not an interface function.

[A] t

[B] area

[C] trngle

[D] triangle

[E] calculateTheAreaOfATriangle

Question 2

On my machine one of these C types is an integer type which can can store more numbers than

the other integer types listed. Which one?

[A] double

[B] long

[C] int

[D] void

[E] char

Question 3

Which C expression below is equivalent to this C expression: !(x || y)

[A] (!x) || (!y)

[B] (!x) && (!y)

[C] x | y

[D] !( x != y)

[E] !( x == y)

Question 4

Consider the following C variable deﬁnition:

char s[] = "hello world";

Suppose we wish to make a copy of the string in s and have it referred to by the variable p.

Which of the following C code fragments does this correctly?

[A] char *p; strcpy(p, s);

[B] char *p = NULL; strcpy(p, s);

[C] char *p; p = (char *) malloc(strlen(s)); strcpy(p, s);

[D] All of the above

[E] None of the above

Question 5

Consider the following C program:

#include <stdio.h>

int f(int *x, int y, int *z) {

(*x)++;

y++;

return *z;

}

int main(int argc, char** argv) {

int w = 1;

int x = 2;

int y = 3;

int *z;

z = &w;

printf("w=%d; x=%d; y=%d; z=%p \n", w, x, y, z);

f(z, x, &y);

printf("w=%d; x=%d; y=%d; z=%p \n", w, x, y, z);

return 0;

}

Which variables have a diﬀerent value printed in the second printf statement?

[A] w only

[B] x only

[C] y only

[D] w and y only

[E] Some other combination

Question 6

The following C program compiles correctly and is run.

#include <stdio.h>

int main(int argc, char** argv) {

int x = 7;

printf("%d\n", (1/2) * x);

return 0;

}

What does it print?

[A] 0

[B] 1

[C] 2

[D] 3

[E] 4

Question 7

Given the following structure deﬁnitions:

typedef struct {

int x;

int y;

} A;

typedef struct {

int v;

A w;

} B;

If we deﬁne a variable p as follows:

B *p;

which one of these is a legal C expression?

[A] p.w.y

[B] p->w.y

[C] p.w->y

[D] p->w->y

[E] p->a->y

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