GO TO INDEX
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.
There are three types of buses:
- Control bus
- Data bus and
- 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.
- First Generation of Computers (1940 to 1956):
Technology Used: Vacuum Tubes
Example: ENIAC, EDVAC, UNIVAC - Second Generation of Computers (1956 to 1963):
Technology Used: Transistors.|
Example: IBM 7094 and IBM 1401 - Third Generation of Computers (1964 to 1971):
Technology Used: Integrated Circuits (ICs).
Example: IBM 360 and IBM 370 - Fourth Generation of Computers (1971 to Present):
Technology Used: Microprocessors.
Example: Apple Macintosh, IBM PC. - 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:
- Microprocessor (CPU)
- Slots
- Ports
- Buses
- RAM and ROM
- 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 |
No comments:
Post a Comment