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:

Generation	First 1st	Second 2nd	Third 3rd	Fourth 4th	Fifth 5th
Duration (Period)	1940-1956	1956-1963	1964-1971	1971 to Present	Present and Beyond
Technology Major Innovation	Vacuum tubes	Transistors	ICs	Microprocessors (LSIC and VLSIC)	Artificial Intelligence Technology (ULSIC)
Internal Storage (Main Memory)	Magnetic Drums	Magnetic core (RAM and ROM)	PROM and DRAM	EPROM and SRAM	EEPROM, SIMM abd DIMM
External Storage	Punched Cards	Magnetic Tapes and Magnetic Disk	Floppy Disk	Floppy Disk and Hard Disk	Optical Disk
I/O Devices	Punched Cards and papers	Magnetic Tapes, Punched Cards, papers for output	Keyboard for Input and Monitor for output	Monitor for output	Keyboard, Pointing device, Scanner as input and Monitor as main output
Language	Machine Languages (Low level)	Assembly Languages and High Language FORTRAN	High Level Languages	4GL 4th Generation Languages	Artificial Intelligence and Expert System
Operating System	Batch  processing (No operating System)	Batch processing and Multi programming (Manually handled Punched Card)	Unix Operating System	Dos, Unix	GUI based Windows, Unix
Size	Main Frame	Small in size Main Frame	Mini	Micro	Tiny Computers
Examples	ENIAC, UNIVAC, EDVAC, EDSAC	IBM 7094 and IBM 1401, NCR-300	IBM 360 and IBM 370, Honey Well 316	Apple Macintosh, IBM PC	Laptop, Tablet PC, Notebook, Digital diary, Palmtop, Pocket PC and Humanoid Robot etc

Practicals

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