COMPUTER SCIENCE AND ENGINEERING
OPERATING SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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memory
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punch card
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magnetic disk
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None of the above
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Detailed explanation-1: -ENIAC was 10 feet high and took up 18, 000 square feet of space. It required 1 million IBM computer punch cards to input data for a complicated ballistics problem, could only calculate numbers up to 10 digits, and had a memory capacity of only about 20 words.
Detailed explanation-2: -ENIAC led the computer field through 1952. In 1953, ENIAC’s memory capacity was increased with the addition of a 100-word static magnetic-memory core. Built by the Burroughs Corporation, using binary coded decimal number system, the memory core was the first ever of it’s kind.
Detailed explanation-3: -Because ENIAC had very little writeable electronic memory, the coded instructions were stored in “function tables, ” banks of 10-position switches that had previously been used to store pre-computed numerical constants. It was the modified ENIAC that ran a computer program stored in switches in April of 1948.
Detailed explanation-4: -At present the ENIAC has only 20 words of internal memory, in the form of electronic accumulators. This small memory capacity limits the size of the problem that can be programmed without repeated reference to the external punched-card memory.