Information Technology [1 Mark Questions]

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.

Memory card can be used in digital camera, cell phones, camcoders, portable audio players, video players, PDAs, gaming consoles, laptops, printers etc.

The ascending order of memory units is Byte, Kilobyte, Megabyte, Terabyte, Geopbyte.

The primary memory is volatile and has limited storage capacity, whereas secondary memory is non-volatile and can store huge amount of data.

CD-ROM disc is created using laser beam.

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.

RAM because it has above given features

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.

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.

Keyboard is the most commonly used input device, which can also be used to type commands directing the computer to perform certain actions.