SLC Computer Science Marking Scheme of SLC 2072

SLC Computer Marking Scheme

Subject: Computer

Q.No.				Answer		Marks
1	a) The cabling structure in which computers are connected in LAN is called					2
	topology.					2
		computer			computer	2


				hub/switch		2

			computer
			computer

(or any other satisfactory answer)

b)	symptoms of virus attact are (Any two)
	The computer will find difficult to boot or does not boot at all.
	File or data will be lost
	Unnecessary message or picture may be displayed	2
	Computer may hang frequently	2
(or any other satisfactory answer)
c)	Advantage: Information combined with multimedia will be easy to understand
	and convincing. ( Or any correct answer)
	Disadvantage: Computer needs extra hardware like CD-Drive, head phone,	2
	sound box, etc, which adds expense.	2
(or any other satisfactory answer)

d) To protect the computer software:

Do not used pirated software, use antivirus software and update frequently, use password, keep the backup copy of important data or software, use firewall to prevent virus.

(Any two correct answer).

Service of Internet:
- www
- chatting
- E-commerce
- E-mail (any two)

2	a) (i) (208)₁₀ = (11010000)₂		1
	(ii) (104)₈ =	(68)₁₀	1
	b) (i) 11000		1
	b) (i) 11000		1
	(ii) 10010		1
	(ii) 10010

3	a) Microwave	(i) unguided media	0.5
	b) UTP	(ii) guided media	0.5
	c) UPS	(iii) Power protection device	0.5
	d) SMTP	(iv) Protocol	0.5

RE-334

a) false

0.5

b) true

0.5

c) false

0.5

d) true

0.5

a) Antivirus

0.5

b) hacker

0.5

c) ISP

0.5

d) server

0.5

a) URL

Uniform Resource Locator

0.5

b) HTTP

Hyper Text Transfer Protocol

0.5

c) LAN

Local Area Network

0.5

d) MODEM

Modulator Demodulator

0.5

Data type use in MS-Access.

text

ii. number

iii. autonumber

iv. yes/no

v. curcency

vi. OLE (any four)

Collection of interrelated data of somebody or something on any topics ,

subject or purpose

is called data base.

Example – telephone directory

dictionary

Query is an object of MS-Access used to view, change, analysed data

according to user’s requirements.

false

0.5*4

true

false

true

Group ‘A’

Group ‘B’

0.5*4

i) OLE

Data type

ii) Validation

limits the value

ii) Form

data entry

iv) Indexing

easy to search

Procedure is a block of statements that solves a particular program.

i. char

ii. int

iii. float

iv. double (any two)

OPEN- used to open sequential data file to read and write data.

MKDIR- To creat new directory.

DECLARE Function Sum (m, n).

0.5*4

Rem to print sum of two numbers

a=6

b=7

CALL sum (a, b)

END

FUNCTION Sum (m, n)

S = m + n

SLC Computer Marking Scheme

			RE-334

		SUM = S
	END FUNCTION
12	The output			2
	The simple interest = 10
	(provide 2 mark for those who attempted the question or who wrote missing
	function procedure)
13	a) user defined function: Prod			2
	b) FOR….NEXT

14	a)	Write a program using SUB…END SUB to display reverse of input string.		3
		Declare sub rev (a$)
		cls
		Input “Enter the string”; a$
		call rev (a$)
		End
		Sub rev (a$)
		For k = LEN (a$) to 1 step – 1
		c$ = MID$ (a$, k, 1)
		d$ = d$ + c$
		next k
		PRINT “Reverse of input string is”, d$
		End sub
		(or any other satisfactory program)
	b)	Write a program using Function…End Function to find area of triangle		3
		Declare Function area (b, h)
		cls
		Input “Enter the breadth”, b
		Input “Enter the length”, h
		PRINT “Area of triangle is”, area (b, h)
		End
		Function area (b, h)
		A = 1/2bh
		Area =A
		End Function
	c)	CLS
		OPEN “MARKS.DAT”	FOR INPUT AS #1
		REM program to display the contents of the data file called ADDRESS. dat		3
		PRINT “NAME”, “Age”,	“City”, “Telephone”
		WHILE NOT EOF (1)
		INPUT #1, Name$, Age, City$, Tele$
		PRINT Name$, Age, City$, Tele$