A computer with an 80286 microprocessor is called
Answer: B
Correct answer: AT computers
IBM’s PC/AT (Advanced Technology, 1984) was built round the Intel 80286. The earlier PC and PC/XT used the 8088, and the PS/2 line that followed used the 80286 and 80386 in a new architecture with the Micro Channel bus.
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An application suitable for sequential processing is
Answer: C
Correct answer: Both a and b
Sequential processing suits work where every record must be handled in a single run, in order - and both payroll and the processing of grades are of that kind. Nothing is gained by random access when the whole file has to be read anyway. Enquiry systems, where one record is wanted at a time, are the opposite case.
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Which of the following is not processing?
Answer: D
Correct answer: gathering
Gathering data is input - it happens before processing begins. Processing is what the machine then does to the data: arranging, manipulating and calculating.
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The digital computer was developed primarily in
Answer: C
Correct answer: USA
The digital computer was developed chiefly in the United States - Atanasoff at Iowa State, Aiken at Harvard, and Eckert and Mauchly at Pennsylvania, who built ENIAC and then UNIVAC. Britain contributed Colossus and the Manchester machines, and Zuse worked in Germany, but the main line of development, and the first commercial machines, were American.
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Software in a computer
Answer: A
Correct answer: Enhances the capabilities of the hardware machine
Software does not make the hardware faster - the clock rate is fixed. What it does is extend what the machine can do: the same processor becomes a word processor, a spreadsheet or a compiler according to the program loaded. Hardware supplies the capability; software directs it.
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Today’s computer giant IBM was earlier known by different name which was changed in 1924. What was that name?
Answer: B
Correct answer: Computing Tabulating Recording Co.
IBM began in 1911 as the Computing-Tabulating-Recording Company, formed by merging three firms - one of them Herman Hollerith’s Tabulating Machine Company, whose punched-card equipment had processed the 1890 United States census. It was renamed International Business Machines in 1924.
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Before a disk drive can access any sector record, a computer program has to provide the record’s disk address. What information does this address specify?
Answer: D
Correct answer: All of above
A disk address must identify the sector uniquely, and that takes all three coordinates: which surface (which platter and which side of it), which track on that surface, and which sector along the track. This is the classic cylinder-head-sector scheme.
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The arranging of data in a logical sequence is called
Answer: A
Correct answer: Sorting
Sorting is arranging records into a defined order - alphabetical, numerical, by date. Classifying is grouping them by category, summarising is condensing them, and reproducing is copying.
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What is the responsibility of the logical unit in the CPU of a computer?
Answer: B
Correct answer: To compare numbers
The logic half of the ALU performs comparisons - equal to, greater than, less than - and the results are what conditional branches act on. The arithmetic half does the calculation, and the control unit directs the flow of information.
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Abacus was the first
Answer: D
Correct answer: mechanical calculator
The abacus, some 5,000 years old, is a mechanical calculating aid: beads moved on rods represent the digits, and the operator performs the arithmetic. It stores no program and does nothing by itself, so it is a calculator rather than a computer - and certainly not electronic.
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