PPSC Lecturer Computer Science Past Papers MCQs | Lecturer Computer Science Paper 3

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PPSC Lecturer Computer Science Past Papers MCQs | PPSC Past Papers Solved MCQ’s

201. A compiler program written in a high level language is called

a) Source Program

b) Object Program

c) Machine Language Program

d) None of the mentioned

202) AX register is also known as:
(a) Accumulator

(b) Collector

(c) Distributor

(d) Counter

(e) None of these

203) In the Base + Offset addressing, Offset address is also known as:

(a) Physical Address

(b) Logical Address

(c) Actual Address

(d) Instruction Address

(e) None of these

204) The technique for allowing a unit to check the status of another independently function unit is known as?

(a) Interrupt

(b) System call

(c) Polling

(d) Trape

(e) None of these

(205) The method for storing data temporarily such that the input-output of the same job is overlapped with its own processing, is known as:

(a) Spooling

(b) Contention

(c) I/O wait

(d) Buffering

(e) None of these

(206) The DMA that uses Busses when CPU is not using them is termed as:

(a) Shared DMA

(b) Cycle Stealing

(c) Channel

(d) Transparent DMA

(e) None of these

(207) _________ Scheduler deals with the decision as to whether to admit another new job to the system.

(a) High Level

(b) Medium Level

(c) Low Level

(d) Short term

(e) None of these

208) When the process is in the states of Blocked Suspended or Ready Suspended, its relevant data is stored in:

(a) Main Memory

(b) Hard Disk

(c) Magnetic Tape

(d) Buffer

(e) None of these

209) Priority, P = (Time Waiting + Run Time) / Run Time is used to calculate priority in __________ scheduling algorithm:

(a) Shortest Job First

(b) Priority Scheduling

(c) Longest Wait First

(d) Highest Response Ratio Next

(e) None of these

210. HDLC Protocol stands for:

(a) High-Level Data Link Control

(b) High Level Development Protocol

(c) Huge Level Data Link Control

(d) High Development Level Control

(e) None of these

211) DBMS stands for what

  1. Database Management System
  2. Database Master System
  3. Database Management Structure
  4. None of the above\

212. Mostly which of the following device is used to carry user files?

A. Floppy Disk

B. Hard Disk



213. Which device is used to backup the data?

A. Floppy Disk

B. Tape

C. Network Drive.

 D. All of the above

214. In order to play and hear sound on a computer, one needs:

A. a sound card and speakers

 B. a microphone

C. all of them required

D. none of them required

215. Which of the following are the cheapest memory devices in terms of Cost/Bit?

A. Semiconductor memories

B. Magnetic Disks

C. Compact Disks

 D. Magnetic Tapes

216. Which of the following are the best units of data on an external storage device?

A. Bits

B. Bytes

C. Hertz

D. Clock cycles

217. Which of the following have the fastest access time?

A. Semiconductor Memories

 B. Magnetic Disks

C. Magnetic Tapes

D. Compact Disks

218. Which of the following is a read only memory storage device?

A. Floppy Disk


C. Hard Disk

 D. None of these

219. Which of the following is a programming language?

A. Lotus

B. Pascal

C. MS-Excel

D. Netscape

220. What is a compiler?

A. A compiler does a conversion line by line as the program is run

B. A compiler converts the whole of a higher level program code into machine code in one step

C. A compiler is a general purpose language providing very efficient execution

D. None of the above

221. What is an interpreter?

A. An interpreter does the conversion line by line as the program is run

B. An interpreter is the representation of the system being designed

C. An interpreter is a general purpose language providing very efficient execution

D. None of the above

222. When a key is pressed on the keyboard, which standard is used for converting the keystroke into the corresponding bits?





223. A Pixel is ………

A. A computer program that draws picture

B. A picture stored in secondary memory

C. The smallest resolvable part of a picture

D. None of these

224. Which device is used as the standard pointing device in a Graphical User Environment?

A. Keyboard

 B. Mouse

C. Joystick

D. Track ball

225. Which number system is usually followed in a typical 32-bit computer?

A. 2

 B. 10

C. 16

D. 32

226. Which number system is usually followed in a typical 32-bit computer?

A. Binary

 B. Decimal

C. Hexadecimal

 D. Octal

227. Which of the following is not an output device?

A. Scanner

B. Printer

C. Flat Screen

 D. Touch Screen

228. Which of the following devices have a limitation that we can only store information to it but cannot erase or modify it?

A. Floppy Disk

 B. Hard Disk

C. Tape Drive


229. Which technology is used in Compact disks?

A. Mechanical

B. Electrical

C. Electro Magnetic

D. Laser

230. Which of the following storage devices can store maximum amount of data?

A. Floppy Disk

B. Hard Disk

C. Compact Disk

D. Magneto Optic Disk

231. Which of the following is the largest manufacturer of Hard Disk Drives?


B. Seagate

C. Microsoft

D. 3M

232. The programs which are as permanent as hardware and stored in ROM is known as

A. Hardware

B. Software

C. Firmware

 D. ROM ware

233. Memory unit is one part of

A. Input device

 B. Control unit

C. Output device

 D. Central Processing Unit

234.Who built the first Mechanical Calculator

A. Joseph Marie Jacquard

 B. John Mauchly

C. Blaise Pascal

 D. Howard Aiken

235. The earliest calculating devices are

A. Abacus

B. Clock

C. Difference Engine

 D. None of these

236. Punched cards were first introduced by

A. Powers

 B. Pascal

C. Jacquard

 D. Herman Hollerith

237. Word length of a Personal Computer is ___

A. 4 bits

B. 8 bits

C. 16 bits

 D. 64 bits

238. Cursor is a ____

A. Pixel

B. Thin blinking line

C. Pointing device

 D. None of these

239. Operating system, editors, and debuggers comes under?

A. System Software

B. Application Software

C. Utilities

 D. None of the above

240. Which device is required for the Internet connection?

A. Joystick

B. Modem

C. CD Drive

D. NIC Card

241. What does DMA stand for?

A. Distinct Memory Access

B. Direct Memory Access

C. Direct Module Access

 D. Direct Memory Allocation

242. When did John Napier develop logarithm?

A. 1416

B. 1614

C. 1641

 D. 1804

243. A normal CD-ROM usually can store up to __________data?

A. 680 KB

B. 680 Bytes

C. 680 MB

D. 680 GB

244. ATM stands for?

A. Automatic Talking Machine

B. Automatic Teller Machine

C. Analog Teller Machine

D. Automatic Ticketing Machine

245. The Second Generation Computer was based on ………….

A. Vacuum Tube

 B. Silicon Chips

C. Transistor

 D. Bio Chips

246. The Third Generation Computer was made with ………….

A. Vacuum Tube

 B. Discrete Components


D. Bio Chips

247. he BIOS is the abbreviation of ………….

A. Basic Input Output System

B. Best Input Output System

C. Basic Input Output Symbol

D. Base Input Output System

248. What do you call a single point on a computer screen

A. Cell

 B. Element

C. Pixel

D. Bit

249. How was the generation of computer classified?

A. by the device used in memory & processor

B. by the speed of computer

C. by the model of the computer

D. by the accuracy of computer

250. Through which device the main components of the computer communicate with each other?

A. Keyboard

B. System Bus

C. Monitor

 D. Memory

251. Which is a valid program to access the Internet?

A. Access

 B. Front Page

C. Windows Explorer

 D. Netscape

252. Which one is the Low Level Language?

A. Assembly

 B. Visual Basic

C. Java

 D. C++

253. Which is a volatile memory?





254. The digital signals can be represented by

A. Binary Codes

 B. 0 and 1

C. High and Low

D. all of the above

255. Which program can be used for email?

A. Internet Explorer

B. Outlook Express

C. NetMeeting

D. FrontPage

256. Modulator-demodulator is a device that converts:

A. Digital signal into analog signal

B. Analog signal into digital signal

C. Both A and B

D. None of the above

257. _______ is used for scanning the pictures and putting them in digitized form in the computer.


B. Plotter

C. Bar-coder

 D. Scanner

258. Animator, 3D Studio, Corel Draw and Flash are………….

A. Word processors

 B. Spreadsheet packages

C. Multimedia S/W

 D. None of the above

259. Which statement is valid?

A. 1 KB = 8 bytes

B. 1 MB = 8 KB

C. 1 KB = 1024 bytes

D. 1 MB = 1024 bytes

260. Which device is used to process data?





261. Who is known as the father of Computer Science?

A. Charles Babbage

B. Howard Aiken

C. Dr. Herman Hollerith

D. Blaise Pascal

262. What is the capacity of a 3.5” Floppy Disk?

A. 360KB

 B. 720KB

C. 1.2MB

D. 1.44MB

263. A Personal Computer (PC) is a …………….. Computer.

A. Super

 B. Main Frame

C. Mini

 D. Micro

264. What type of printers are Dot Matrix Printers?

A. Laser

 B. Inkjet

C. Impact

D. Drum

265. What is the full form of RAM?

A. Read Access Memory

B. Random Access Memory

C. Rapid access Memory

D. none

  • 1 byte = 8 bits
  • 1 mega byte = 1048576 bytes
  • 1 kilo byte = 1024 bytes
  • A combination of 16 bits are called word.
  • A terabyte = 1 trillion bytes
  • Our PC belongs to 4th generation
  • Fred Cohen coined the word computer virus
  • First computer virus was created in 1970 at Bell laboratories
  • WORM means Write Once Read Many
  • Power of a super computer is measured in FLOPS (Floating Point Operations per Second)
  • WWW/http: (hypertext transfer protocol) was created by Tim Burner Lee in 1992
  • Intel means Integrated Electronics
  • 1 worksheet contains 256 columns
  • G.W.Basic G.W stands for Gate Way
  • Super Computer was created by J.H.Van Tassel
  • CORBA is Common Object Request Broker Architecture
  • URL is Uniform or Universal Resource Locator
  • Intel invented RAM chip
  • Information stored on disk as series of bumps on its shiny side.
  • DVDs hold more information than CDs. They use smaller bumps and have two reflective layers
  • Recordable CDs do not have bumps. There are patches of color on disk to change the reflected laser light
  • In 1951 Univac – 1, the world’s first commercial computer was designed by John Mauchly and J. Presper Eckert. They built ENIAC, the first electronic computer in 1946
  • In 1968 mainframe was built.
  • In 1976 first supercomputer the Cray-1 was developed
  • In 1981 IBM produce the IBM PC.
  • In 1998 IBM made quantum computer
  • Super computers uses parallel processing
  • In 1974, computer games were introduced.
  • PROM is the abbreviation of programmable read only memory
  • What was the world’s first high level programming language 1957: IBM FORTRAN
  • A JPEG is a picture file format – what does JPEG stand for: Joint Photographic Experts Group
  • During World War II, IBM built the computers the Nazis used to manage their death/concentration camps
  • Registers are temporary storage areas within the CPU.
  • First apple computer was built in garage.
  • The language of small talk is object oriented.
  • Shell is an operating environment.
  • Virtual memory is also known as virtual page.
  • NOS refer to operating systems for a network.
  • In EBCDIC each character is denoted by 8 bits.
  • Diodes are used in analog computer circuits as limiter.
  • Wetware stands for any organic intelligence.
  • GIGO stands for garbage in garbage out.
  • Application of flip-flap are counters, shift register and transfer register.
  • Bootstrap is associated with computer.
  • FORTRAN stands for formula translator.
  • A group of character that is termed as a single entity is called word.
  • Clip art is a computer prepared art.
  • Mark sensing is another term for OMR.
  • Authorization to make multiple software copies is called site licensing.
  • Antivirus is also known as vaccines.
  • Free software is also known as public domain software.
  • In computer DFD stands for Data Flow Diagram.
  • Cyber Space is called to Virtual world of the computer.
  • What does the sun in SUN Microsystems stand for Stanford University Network
  • What does Intel stand for- Integrated Electronics
  • All PCs have a BIOS what does bios stand for-Basic Input Output System
  • What is the common name for an integrated circuit A Chip
  • In WWW terms what does i.e. mean on a domain name-Ireland
  • What company introduced the first commercial minicomputer 65 DEC
  • Name the first web browser publicly available NCSA Mosaic
  • The world’s most powerful super computer is called ASCI white.
  • World Wide Web was invented in 1993 by Tim Bareness Lee.
  • The B-programming language was developed by Ken Thompson.
  • The 1st commercially produced and sold computer (1951) was UNIVAC.
  • The transformation from heavy computers to PCs was made possible using microprocessors.
  • The first microprocessor was developed in 1971 by Intel.
  • A pentium 4 (P-4) employs roughly 40 million transistors.
  • Mark-1, Apple-1, and collossus were initial desktop computers.
  • Binary digits are briefed as bit.
  • A collection of bits is called byte.
  • The first home computer (1977), which was sold in millions of units was Apple II.
  • ‘PARAM’ is a supercomputer.
  • Father of the Computer.. Charles Babbage