Digital Computer Electronics – Section 1

26. The Gray code for decimal 7 is

A. 0111
B. 1011
C. 0100
D. 0101
E. None of the above

Correct Answer:  C. 0100

27. The time required for a pulse to decrease from 90 to 10 percent of its maximum value is known as

A. rise time
B. decay time
C. binary level transition period
D. propagation delay
E. None of the above

Correct Answer:  B. decay time

28. Conversion of binary number 1010000101112 to hexadecimal number is

A. D8F916
B. A8B916
C. A1716
D. D9F816
E. None of the above

Correct Answer:  C. A1716

29. _____dominates the LSI field, and _____ is used extensively where lowest power consumption is necessary.

A. NMOS, PMOS
B. PMOS, CMOS
C. NMOS, CMOS
D. MOSFET, PMOS
E. None of the above

Correct Answer:  C. NMOS, CMOS

30. Conversion of an octal number 1438 to its decimal number is

A. 9010
B. 97110
C. 9910
D. 10710
E. None of the above

Correct Answer:  C. 9910

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