The Epson HX-20 (also known as the HC-20) is generally regarded as the first laptop computer, announced in November 1981, although first sold widely in 1983. It was hailed by Business Week magazine as the “fourth revolution in personal computing”.

Correct Option: B

The Epson HX-20 (also known as the HC-20) is generally regarded as the first laptop computer, announced in November 1981, although first sold widely in 1983. It was hailed by Business Week magazine as the “fourth revolution in personal computing”.

The Control Unit, considered as the “Central nervous System” of computer, obtains the instructions from the memory, interprets them and directs the operation of the computer. It selects, interprets and monitors the execution of the program instructions by generating the timing and control signals.

Correct Option: C

The Control Unit, considered as the “Central nervous System” of computer, obtains the instructions from the memory, interprets them and directs the operation of the computer. It selects, interprets and monitors the execution of the program instructions by generating the timing and control signals.

Optical Mark Reader (OMR) is a special type of optical scanner used to recognize the type of mark made by pen or pencil. It is used where one out of a few alternatives is to be selected and marked. It is specially used for checking the answer sheets of examinations having multiple choice questions.

Correct Option: B

Optical Mark Reader (OMR) is a special type of optical scanner used to recognize the type of mark made by pen or pencil. It is used where one out of a few alternatives is to be selected and marked. It is specially used for checking the answer sheets of examinations having multiple choice questions.

System management is designed to balance processing and input/output, with the aim of providing reasonable minimum turnaround and maximum throughput. Turnaround is the amount of time elapsing between a request to the computer to execute a program or input and the availability of output.

Correct Option: A

System management is designed to balance processing and input/output, with the aim of providing reasonable minimum turnaround and maximum throughput. Turnaround is the amount of time elapsing between a request to the computer to execute a program or input and the availability of output.

Google derived its name from the word “googol”, a term coined by then nine-year-old Milton Sirotta, nephew of the American mathematician Edward Kasner. The story goes, Kasner had asked his nephew to invent a name for a very large number - ten to the power of one hundred (the numeral one followed by 100 zeros), and Milton called it a googol.

Correct Option: D

Google derived its name from the word “googol”, a term coined by then nine-year-old Milton Sirotta, nephew of the American mathematician Edward Kasner. The story goes, Kasner had asked his nephew to invent a name for a very large number - ten to the power of one hundred (the numeral one followed by 100 zeros), and Milton called it a googol.