Digital Computer Electronics – Section 2

36. The maximum number of TTL loads that a TTL device can drive reliably over the specified temperature range is

A. fanout
B. bipolar
C. chip
D. universal logic circuit
E. None of the above

Correct Answer:  A. fanout

37. Conversion of hexadecimal number 6B216 to it’s binary number equivalent is

A. 11110001101112
B. 0110101100102
C. 01100110011112
D. 111111112
E. None of the above

Correct Answer:  B. 0110101100102

38. The output of the following gate is 0 only if at least one of the inputs is 1:

A. AND gate
B. OR gate
C. EX-OR gate
D. NOR gate
E. None of the above

Correct Answer:  D. NOR gate

39. In which of the following adder circuits, the carry look ripple delay is eliminated?

A. Half adder
B. Full adder
C. Parallel adder
D. Carry-look-ahead adder
E. None of the above

Correct Answer:  D. Carry-look-ahead adder

40. With positive clocking, the clock signal must be _____ for the flip-flop to respond.

A. high
B. low
C. set
D. race
E. None of the above

Correct Answer:  A. high

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