Information Technology MCQ

 A USB flash drive, data stick, thumb drive or pen drive is a portable drive that connects to a computer’s USB port.

Blu-ray disc can hold almost 5 times more data than a single layer DVD.

Magnetic tape is used with larger computers such as the mainframe, where huge amount of data is kept stored for longer period of time.

The concentric circles on the floppy disks are known as tracks. These tracks are further divided into pie-shaped sections known as sectors.

Secondary memory is the slowest and cheapest form of memory. It cannot be processed directly by the CPU and it must be first copied into RAM.

Secondary memory is used to store large amount of information permanently.

Among given options, ROM is the memory that retains its contents even after the interruption of power so, it is a non-volatile memory.

RAM is a volatile memory that means data remains stored in RAM only when power supply is there and computer is switched ON but as soon as the computer is turned OFF, the contents of RAM get erased.

Geopbyte is the highest memory measurement unit.
It is equal to 1024 Brontobyte, (nearly 2,on bytes).

Nerve centre because it controls the overall processing of a computer system.

CU is used to co-ordinate the input and the output devices of a computer system.

ALU is a digital circuit in which numerical and logical operations are defined.

Plotter is a computer hardware device similar to a printer that uses a pen, pencil, marker or other writing tools to make a design.

Dot matrix is a type of impact printer that prints one character at a time.

CRT monitor works in the same way as a television.

OMR (Optical Mark Recognition) is the process of capturing human marked data from document forms such as surveys and test.

OCR stands for Optical Character Recognition used as an input device in a computer system.

 Large amount of cheques are processed by the MICR (Magnetic Ink Character Recognition). It can read characters that are printed using a special magnetic ink. It is mostly used in banks.

 Drum

Scanner is an input device that is used to make a digital copy of a photograph. It converts the image or text into a digital file.

 Light pen is useful for graphic designer as it is useful for identifying a particular location on the screen

The first computer mouse was invented by Douglas Engelbart at Stanford Research Centre in 1960s.

Unlike human beings, a computer is free from monotony, tiredness, lack of concentration etc. and can work for hours without creating any errors. This characteristic of computer is known as diligence.