Page 36 - Computer Science V2.0 Class 11

8. What is the primary role of system bus? Why is data bus is bidirectional while address bus is unidirectional?
Ans. The primary role of a system bus is to provide communication pathways that allow data and control signals to travel between the major
components of a computer system, such as the CPU, memory, and I/O devices.
Data buses are bidirectional because they need to carry data in both directions (to and from the CPU and other components), facilitating
the transfer of information. In contrast, address buses are unidirectional because the CPU sends addresses to specify a location in
memory or a peripheral device, but it doesn't need to receive addresses from these devices during normal operation. Unidirectional
address buses simplify the design and reduce the complexity of the system bus.
9. Differentiate between proprietary software and freeware software. Name two software for each type.
Ans.

Proprietary software Freeware software
Proprietary software is software which is not available freely or Freeware software is available anywhere publicly.
publicly.
To get Proprietary software there is a need of authenticated To get freeware software there is no need of authenticated license
license
To get Proprietary software we must have to pay for it Free software is free of charge
Example: Adobe PDF editor, WinRAR Example: NotePad++, VLC player
10. Write the main difference between microcontroller and microprocessor. Why do smart home appliances have a microcontroller instead
of microprocessor embedded in them?
Ans.

MICROCONTROLLER MICROPROCESSOR
Microcontroller used for perform particular task Microprocessor used for intensive processing
Micro controller does not have capacity to perform multiple task Microprocessor have capacity to perform multiple task
Size of micro controller: 8-bit,16-bit,32-bit Size of microprocessor: 64-bit,32-bit
Microcontroller is cheaper in cost Microprocessor is expensive
Microcontroller consumes less power Microprocessor consumes more power
Application: microwave oven Application: computer, laptop
Smart home appliances incorporate a microcontroller due to its low power consumption and cost-effectiveness. Additionally,
microcontrollers demand minimal space and operate without the need for a separate CPU or other peripheral devices.
11. Mention the different types of data that you deal with while browsing the Internet.
Ans. Different types of data while browsing the Internet:
Structured: the data which is stored in most organized way is known as structured data
Unstructured: the data which is not stored in organized way is known as unstructured data
Semi structured: the data lies in between the structured and unstructured data is known as semi structured data
12. Categorise the following data as structured, semi structured and unstructured:
Newspaper
Cricket Match Score
HTML Page
Patient records in a hospital
Ans.

STRUCTURED SEMI STRUCTURED UNSTRUCTURED
Patient record in hospital Html page newspaper
Cricket match score
13. Name the input or output device used to do the following:
a. To output audio
b. To enter textual data
c. To make hard copy of a text file
d. To display the data or information
e. To enter audio-based command

22 Touchpad Computer Science (Ver. 2.0)-XI