Sahiwal Board 2017
Computer Science
(Inter part1)
(SECTION-A)
Note: Pour possible answers A, B; C and D to each question are given. The choice which you think is correct that circle in front that question with Marker or Pen ink. 'Lining or filling two or more circles 'will result in zero mat k in that question. Write the letter A, B. (7 or D in the column.(write correct "option) against each question also. If there k a contradiction in the bubble and hand written answer, bubble option will be considered correct.

• The extension of an executable file is

(A) .xls
(B) .doe
(C) .ext
(D) .exe

• Pressing and releasing the left mouse button quickly is called

(A) pointing
(B) dropping
(C) clicking
(D) dragging

• Header and footer option can be used from which menu?

(A) Tools
(B) Insert
(C) Edit
(D) View

• How many worksheets are contained in a workbook by default?

(A) 3
(B) 4
(C) 5
(D) 6

• Web pages are connected to one another using

(A) Interlink
(B) HTTP
(C) Hyperlinks
(D) Multimedia

• Which key removes the character to the left of cursor?

(A) Esc
(B) All
(C) Backspace
(D) Delete

• Which of the following is faster printer?

(A) laser
(B) Inkjet
(C) Dot-matrix
(D) Daisy

• Each computer on a network is called a

(A) link
(B) code
(C) node
(D) mode

• OSL model was created by

(A) ISO
(B) ANSI
(C) IBM
(D) NESPAK

• How many characters ASCII-8 bit code can represent?

(A) 128
(B) 256
(C) 364
(D) 1024

• Select unguided media from the following

(A) twisted pair
(B) coaxial
(C) fiber optic
(D) satellite

• Many banks provide the facility of

(A) CAD
(B) CAM
(C) ATM
(D) CBT

• Expansion cards are inserted into

(A) slots
(B) plugs
(C) CPU
(D) Buses

• Which memory is used to speed up the computer processing?

(A) ROM
(B) Cache
(C) BIOS
(D) HOD

• MCAfee is an example of

(A) virus
(B) Antivirus
(C) Hacker
(D) Worm

SUBJECTIVE PART
(Section-B)

Q.2 Write short answers to any SIX (6) questions.

1. What is light pen?
2. Define software and hardware relationship.
3. What is logical design of a system?
4. List any two benefits of computer networks?
5. Explain extranet.
6. What is the form of data on network layer of OSI?
7. Define Text and Numeric data.
8. Differentiate between baseband and broadband.
9. How external modem is connected with computer?

Q.3 Write short answers to any EIGHT (8) questions.

1. Write two benefits of computer in medical field.
2. State the purpose of computer aided design.
3. What is a robot?
4. Why is RAM called volatile memory?
5. Write two advantages of interrupts.
6. Distinguish between serial and parallel port.
7. Describe the function of stack pointer register.
8. What is Cache memory?
9. How does virus spread through email?

Q.4 Write short answers to any SIX (6) questions.

1. Define plug & play feature of window.
2. What is meant by primary partition? Define word processing.
3. What is character formatting?
4. Differentiate between line spacing and paragraph spacing.
5. What is worksheet in spreadsheet software?
6. Differentiate between active cell and passive cell in Excel.
7. Define the term "ARPANET ".
8. What do you mean by uploading and downloading?

SECTION-C

Note: Attempt any THREE questions. All questions carry equal marks.
Q. 5 Define Non-Impact printer and write down its types.
Q. 6 What is Ring Topology? Explain its working with diagram. Write its two advantages and two disadvantages.
Q. 7 What is data communications? Explain the basic components of communication network.
Q. 8 What is ROM? Discuss its different types.
Q. 9 What is data security? Discuss six ways in which the security of data may be violated.