Microsoft Word - KMPK SchemePRAPSPM SET B_SC025-1819

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PRAPSPM SC025
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KMPK 2018/2019
Answer Scheme set B
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LECTURER NAME :
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MATRIC NUMBER I IDENTITY CARD NUMBER
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SC025
Computer Science
Semester 2
2018/2019
2 ½ hours






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PERAK MATRICULATION COLLEGE
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MINISTRY OF EDUCATION MALAYSIAA
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TRIAL TEST
SET B (Answer Scheme)

COMPUTER SCIENCE
2 ½ HOURS


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DO NOT OPEN THIS BOOKLET UNTIL YOU ARE TOLD TO DO SOOO
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D D O N O T O P E N TH I I S B O O K LE T U N T I I L Y O U A R E T O LD TO D O S
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Q ue s t i on N u m b e r Mark
Question Number
SECTION A
1 /4
2 /7
3 /7
4 /7
5 /7
6 /11
SECTION B
1 /11
2 /15
3 /13
4 /13
5 /4
6 /11
Total Markk
T ot a l M a r / 110

Bil Answer Mark

PRAPSPM SC025
KMPK 2018/2019
Answer Scheme set B
1 2 techniques are
- flowchart and pseudocode. 2 marks

Pseudocode an artificial, informal language (similar to english) used to develop
algorithm. While flowchart a graphical representation of an algorithm in relation to 2 marks
its sequence of functions

2 a. Inheritance- mechanism in which one object acquires all the properties and 1 mark
behaviors of a parent object.
Encapsulation- process of wrapping code and data together into a single unit. 2 mark
Abstraction - process of hiding the implementation details and showing only
functionality to the user.
Polymorphism- Polymorphism is a concept by which we can perform a single
action in different ways

b 1 mark
i. Object is an entity that has both state and behaviour. Object also known as an
instance of a class.

ii. 3 marks
-State / Attribute
-Behaviour
-Identity


3 a. 4 marks
i. 6.0 atau 6 (bukan 6.5 sebab int /int hasil tetap integer)
ii. 17
iii. 13.25
iv. 1
b. x = 8 3 marks
y = 5
z = 8

4 a.Array is an ordered indexed collection of data values of the same type 2 marks

b. 2 marks
i integer (int), hold whole number 2 marks
ii. car_no[3] = 7423 and car_no[6]=2148
c.1978 1 mark

5. a. A programming technique that solve complex problem by divide it into smaller 2 marks
sets by creating objects.

b. 94 @ 100999794 2 marks
c. 4 marks
int birthyear = in.nextInt();
String name = in.nextLine(); OR in.next();
char gender = in.next().charAt(0);
//1 marks for each (3marks) and 1 mark for correct syntax.

6. import java.util.Scanner; 11 marks
class BaseExp {
public static void main(String[] args) {

PRAPSPM SC025
KMPK 2018/2019
Answer Scheme set B
Scanner sc = new Scanner(System.in);
BaseExp obj = new BaseExp(); //1mark

System.out.print("base: "); //prompt user enter base
int base = sc.nextInt(); //1mark

System.out.print("power: ");
int power = sc.nextInt(); //1 mark
System.out.print("Answer : " +obj.findExponent(base, power));
//2marks
}
public int findExponent(int x, int y) { //2 marks
int result=1; //1mark
for (int i = y; i > 0; i--) OR for (int i = 1; i <=y; i++)//1mark
result = result*x; //1mark
return result; //1mark
}
}

Section B


1 a. 3 marks
Input : number of tiles (1Mark) / qtyTiles
Process : to calculate number of boxes based on number of tiles (1 Mark)
Output : number of boxes(1 Mark)

b. Input : qtyDVD (1Mark) 4 marks
Process : Determine profit based on qtyDVD (2 Marks)
Output : profit (1 Mark)

c. -Writing comments between your lines of codes Or 1 mark
- creating a separate text file to explain the program.

d. 3 types of errors: (1 mark for any type, 1 mark explain , 1 mark example) 3 marks
- Syntax error - the error occur when the syntax of the programming
language is violated.Example missing semicolon in the process statement.
result = a+b
- Run-Time error - the error occur when a program with no syntax errors asks
the computer to do something that the computer is unable to reliably do.
Example : divide variable with 0.
- Logic Error -the error occur when there is a design flaw in your program or
the output is wrong.Example multiplying when you should be dividing.




2 a. 6 marks
Start
Read num
i =1
Repeat while i <=10 (i is less than or equal to 10)
ans = num x i

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PRAPSPM SC025
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KMPK 2018/2019
Answer Scheme set B
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Display num + “ x” + i + “=” + ans + “\n”
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End repeat
End
b. Flowchart 6 marks

Start 3 marks
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Read A, B @ set A=5 B= 100
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Temp = A
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B= Temp

Display A,B
End
3 1. // Good Luck for PSPM 2 marks
2. /* Good Luck for PSPM*/
b. 2 marks
if (count>100)
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c. 5 marks
i.(count < 5)
ii. sum=20, count = 6
iii. sum=0, count = 5
d. 4 marks
double x, y;
for( x = 5; x<=10; x=x+0.2)
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System.out.print(y);
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PRAPSPM SC025
KMPK 2018/2019
Answer Scheme set B

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ii. Determine whether “the three numbers are the same” or not based on 2 marks
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iii. “The three numbers are the same”” or “ The………………..” 2 marks
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iv. “ “The three numbers are different”” 2 marks

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v. Flowchart 6 marks



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5. a. int findSquare(int x) // OR int findSquare (int x) 2 marks

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c. obj.findSquare(i); 1 mark
6. import java.util.Scanner; 11 marks
class ConvertTemp {
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ConvertTemp obj = new ConvertTemp(); //1mark
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double celcius, fahrenheit; //1markk
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System.out.print("Celcius : " +obj.findCelcius(fahrenheit));
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//1mark

PRAPSPM SC025
KMPK 2018/2019
Answer Scheme set B
}
double findCelcius(double cel) { //1mark
double c;
c = 5*(cel-32) / 9.0; //0.5mark
return c; //0.5mark
}
double findFahrenheit(double fah) { //1mark
double f;
f = (9*fah / 5.0) + 32; //0.5mark
return f; //0.5mark
}
}