43. A memory address is usually
A. decimal number
B. a binary number a hexadecimal number
C.(e) entered serially
D.

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44. The contents of which memory degrade with every read operation?
A. EAROM
B. PROM
C. EPROM
D. all of the above can be erased by

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45. EPROM contents exposing it to
A. infra-red rays
B. ultra-violet light
C. burst of microwaves
D. intense heat radiations

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46. The largest computers commonly word size of? bits
A.8
B.16
C.32
D.64

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47. For providing the same total amount of read/write memory of 4096 bits, which will cost the least?
A. 512 x 8-bit RAM
B. 1024 x 4-bit RAM
C. 4096 x 1-bit RAM
D. both (a) and (c)

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48. A floating point number consists of
A. a mantissa only
B. base only
C. an exponent only
D. all of the above

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49. With reference to computer hardware, 'status flag' means
A. a binary digit logic gate of a CPU which automatically sets or resets to reflect the result of ALU operations
B. national flag of the manufacturing country
C. the same thing as buffer register
D. a unit for performing multibyte arithmetic

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