can anybody send me solutions of chapter 1 Computer class 9th Information technology book
plz plz it is very important
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can anybody send me solutions of chapter 1 Computer class 9th Information technology book
plz plz it is very important
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Question 1.
Name the most commonly used input device.
Answer:
Keyboard is the most commonly used input device, which can also be used to type commands directing the computer to perform certain actions.
Question 2.
Explain the main advantage and disadvantage of an OCR?
Answer:
The main advantage of an OCR is the ability to scan the characters accurately.
The disadvantage of an OCR is limited number of characters offered by it.
Question 3.
Why do we use webcam?
Answer:
A webcam is basically used for capturing a series of digital images that are transferred by the computer to a server and then displayed to the hosting page.
Question 4.
Name the memory (Primary/Secondary)with the following features:
If current is interrupted, data is lost.
Before a program is ready to run, the program is loaded into this memory, which allows the CPU directly access the program.
Answer:
RAM because it has above given features.
Question 5.
Write any one advantage of cache memory.
Answer:
The main advantage of cache memory is that if needed data is found in cache, then CPU does not have to use mother¬board’s system bus for data transfer and processing gets fast.
Question 6.
Which disc is created using laser beam?
Answer:
CD-ROM disc is created using laser beam.
Question 7.
Give one difference between primary and secondary memory.
Answer:
The primary memory is volatile and has limited storage capacity, whereas secondary memory is non-volatile and can store huge amount of data.
Question 8.
Arrange the following memory units in ascending order of their storage capacities: Kilobyte, Byte, Terabyte, Megabyte, Geopbyte
Answer:
The ascending order of memory units is Byte, Kilobyte, Megabyte, Terabyte, Geopbyte.
Question 9.
Where can a memory card be used?
Answer:
Memory card can be used in digital camera, cell phones, camcoders, portable audio players, video players, PDAs, gaming consoles, laptops, printers etc.
Question 10.
Define the term byte. Differentiate between a bit and a byte.
Answer:
Byte is a unit of measuring computer storage. Binary digit is called bit in short. There are only two binary digits 0 and 1, whereas a combination of 8 bits is called a byte.
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