An AND gate has two inputs A and B and one inhibit input 3, Output is 1 if A = 1

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Question
An AND gate has two inputs A and B and one inhibit input 3, Output is 1 if
Options
A. A = 1, B = 1, S = 1
B. A = 1, B = 1, S = 0
C. A = 1, B = 0, S = 1
D. A = 1, B = 0, S = 0

Correct Answer

A = 1, B = 1, S = 0

Explanation

All AND inputs must be 1 and inhibit 0 for output to be 1.

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3. For the minterm designation Y = ? m (1, 3, 5, 7) the complete expression is
Options
A. Y = A BC + A B C
B. Y = A B C + A B C + ABC + A BC
C. Y = A B C + A B C + ABC + A BC
D. Y = A B C + ABC + A BC + A BC

4. The greatest negative number which can be stored is 8 bit computer using 2's complement arithmetic is
Options
A. - 256
B. - 128
C. - 255
D. - 127

5. Which device has one input and many outputs?
Options
A. Multiplexer
B. Demultiplexer
C. Counter
D. Flip flop

6. The fixed count that should be used so that the output register will represent the input for a 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000).
Options
A. 000110
B. 0010
C. 1111
D. 011101

8. A JK flip flop has t_pd= 12 ns. The largest modulus of a ripple counter using these flip flops and operating at 10 MHz is
Options
A. 16
B. 64
C. 128
D. 256

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