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ECE Objective Questions { Digital Circuit and Microprocessor }



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

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

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

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

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)

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

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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