The first mechanical adding machine was invented by Blaise Pascal in ____________.
Answer: B
Correct answer: 1642
Pascal built his mechanical adding machine, the Pascaline, in 1642, at the age of nineteen, to help his father with tax accounts.
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Which of the following is the most powerful type of the computer?
Answer: D
Correct answer: Super computer
Supercomputers are the fastest machines built, measured in floating-point operations per second. A mainframe handles more simultaneous users but far less computation, a microcomputer is a personal machine, and a superconductor is a material, not a computer.
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Which among the following registers is loaded with the contents of the memory location pointed by the PC?
Answer: C
Correct answer: Instruction register
The program counter holds the address of the next instruction; that address goes to the memory address register, the word fetched arrives in the memory data register, and the instruction itself is then placed in the instruction register for decoding.
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_________ computers are used in Banking, Railways, and Airlines.
Answer: D
Correct answer: Mainframe Computer
Banks, railways and airlines need one machine to handle very large numbers of transactions and users reliably, which is exactly what mainframes are designed for. Supercomputers are optimised for calculation rather than for transaction volume.
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The first digital electronic computer was built in the year_______.
Answer: B
Correct answer: 1940
The first digital electronic computer, the Atanasoff-Berry Computer, was built at Iowa State between 1937 and 1942, which places it in 1940 among the options given. ENIAC, often called the first, came later, in 1946.
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Which of the following is not a class based on size?
Answer: D
Correct answer: Digital Computer
Mainframe, mini and micro are the classes defined by size and capacity. Digital describes how a computer represents data - as against analogue - and says nothing about how big it is.
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The number of records contained within a block of data on magnetic tape is defined by the
Answer: C
Correct answer: Blocking factor
The blocking factor is the number of logical records grouped into one physical block on tape. Blocking reduces the number of inter-block gaps and so uses the tape more efficiently; the other three names are not standard terms.
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Second Generation computers were developed during
Answer: B
Correct answer: 1956 to 1965
The transistor generation runs from about 1956 to 1965. The years to 1955 belong to the vacuum tube machines, and integrated circuits take over from about 1965.
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The primary purpose of software is to turn data into _____
Answer: B
Correct answer: Information
Data are raw facts; software organises, selects and presents them so that they mean something, and that is what turns data into information. Programs are the software itself rather than its product.
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General purpose computers are those that can be adopted to countless uses simply by changing its
Answer: C
Correct answer: Program
What makes a computer general purpose is that the same hardware performs a different task when given different instructions. Changing the devices attached to it or the processor inside it does not alter what job it can be put to.
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