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Friday 11 March 2022

Computer Theory And Practical - Solved Model Paper - For Class IX (Science Group) - 2021 and Onward

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Computer
Theory And Practical
For Class IX (Science Group)
Model Papers 2021 and Onward



Solution

BOARD OF SECONDARY EDUCATION KARACHI
MODEL QUESTION PAPER
S.S.C. (ANNUAL) EXAMINATIONS 2021 for IX, 2022 for X And ONWARDS
COMPUTER STUDIES (THEORY')

SECTION " B" (SHORT ANSWER QUESTIONS)
Note: Answer any TEN (10) questions from this section. All questions carry equal marks.


Q.2: Define Bus. How many types of buses?
Ans: Buses:
  • In computer, Buses are the electric paths on which data is sent and received by different components.
  • They are just like roads. As roads connect different places, buses connect all the parts of the computer to each other.
  • They also connect all internal components on the motherboard.
Types Of Buses:
There are three types of buses:
  1. Control bus
  2. Data bus and
  3. Address bus

1. Control Bus:
  • Control bus is a physical connection that carries command between different components to control all activities in a computer.
  • The bus carries signals that report of status of various devices.
  • e,g. one line of the bus is used to indicate whether CPU is currently reading from or Writing to main memory.

2. Data Bus:
  • Data bus carries data between the processor, memory unit and other components.
  • The speed of data travelling between components depends upon the number of wires in the bus.

3. Address Bus:
  • Address bus carries the address of the data (but not the data). The address bus is used to specify memory location to be used by microprocessor for specific operation.
  • Address bus is used to specify a physical address.
  • e.g.  A system with a 32-bit address can address 232 memory locations


Q.3: Define Electronic Era. In how may generation Modern age can be divided?
Ans: ELECTRONIC ERA (Modern Age)
The advancement in the vacuum or electron tube gave birth to the electronic era.
  • In this era the true computers were invented which worked on the principle of input, store, process and output.
  • Continuous advancement in electronic engineering increased efficiency and speed of computers considerably.
  • The electronic era may be categorized in generations on the basis of core technology used to build computers.

GENERATION OF COMPUTER
Modern age of computers are divided in five generations. Each generation is characterized by a major technological development that fundamentally changed the way computers operate, cheaper, more powerful and more efficient and reliable devices.
  1. First Generation of Computers (1940 to 1956):
    Technology Used: Vacuum Tubes
    Example: ENIAC, EDVAC, UNIVAC

  2. Second Generation of Computers (1956 to 1963):
    Technology Used: Transistors.|
    Example: IBM 7094 and IBM 1401

  3. Third Generation of Computers (1964 to 1971):
    Technology Used: Integrated Circuits (ICs).
    Example: IBM 360 and IBM 370

  4. Fourth Generation of Computers (1971 to Present):
    Technology Used: Microprocessors.
    Example: Apple Macintosh, IBM PC.

  5. Fifth Generation of Computers (Present and Beyond):
    Technology Used: Artificial Intelligence Technology, still being developed.
    Example: laptop, notebook, digital diary, Android, Pocket PC, Palm top, Humanoid Robots etc.

Q.4: Enlist any three components present on Motherboard?
Ans: Components Of Motherboard:
It includes the following general components:
  1. Microprocessor (CPU)
  2. Slots
  3. Ports
  4. Buses
  5. RAM and ROM
  6. Other electronic components for example resistors, capacitors, diodes, transistors, jumpers etc.


SECTION " (DESCRIPTIVE ANSWER QUESTIONS)
Note: Attempt any THREE (03) questions from this section. All-questions carry equal marks.

0.17. Discuss the features of all generations with the help of generation table.
Ans: GENERATION TABLE:
GenerationFirst
1st
Second
2nd
Third
3rd
Fourth
4th
Fifth
5th
Duration
(Period)
1940-19561956-19631964-19711971 to PresentPresent and Beyond
Technology
Major Innovation
Vacuum tubesTransistorsICsMicroprocessors
(LSIC and VLSIC)
Artificial Intelligence Technology
(ULSIC)
Internal Storage
(Main Memory)
Magnetic DrumsMagnetic core
(RAM and ROM)
PROM and DRAMEPROM and SRAMEEPROM, SIMM abd DIMM
External StoragePunched CardsMagnetic Tapes and Magnetic DiskFloppy DiskFloppy Disk and Hard DiskOptical Disk
I/O DevicesPunched Cards and papersMagnetic Tapes, Punched Cards, papers for outputKeyboard for Input and Monitor for outputMonitor for outputKeyboard, Pointing device, Scanner as input and Monitor as main output
LanguageMachine Languages
(Low level)
Assembly Languages and High Language
FORTRAN
High Level Languages4GL
4th Generation
Languages
Artificial Intelligence and Expert System
Operating SystemBatch  processing
(No operating System)
Batch processing and Multi programming
(Manually handled Punched Card)
Unix Operating SystemDos, UnixGUI based Windows, Unix
SizeMain FrameSmall in size
Main Frame
MiniMicroTiny Computers
ExamplesENIAC, UNIVAC, EDVAC, EDSACIBM 7094 and IBM 1401, NCR-300IBM 360 and IBM 370, Honey Well 316Apple Macintosh, IBM PCLaptop, Tablet PC, Notebook, Digital diary, Palmtop, Pocket PC and Humanoid Robot etc


Practicals




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