| 1. | With which decoder it is possible to obtain many code conversions ? | |
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2 line to 4 line
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3 line to 8 line
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not possible with any decoder
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4 line to 16 line decoder
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Report Question| 2. | The number of 4-line -to-16-line decoders required to make an 8-line-to-256-line decoder is ? | |
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16
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17
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32
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64
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| 3. | In the toggle mode, a JK flip-flop has ? | |
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J= 0, K= 0
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J=0, K=1
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J=1, K= 0
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J=1, K=1
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| 4. | In a JK flip-flop, J is connected to Q’ and K is connected to Q outputs. The JK flip-flop converts into a ? | |
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R-S flip-flop
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D flip-flop
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T flip-flop
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Clocked R-S flip flop
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| 5. | The 'race-around' condition occurs when ? | |
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J = 0, K = 0
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J = 0, K = 1
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J = 1, K = 0
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J = 1, K = 1
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| 6. | The functional difference between SR and JK flip-flops is that ? | |
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JK flip-flop has a feedback path
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JK flip-flop does not require any external clock
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JK flip-flop is faster than SR flip-flop
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JK flip-flop can accept both inputs
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| 7. | When a flip-flop is reset, its output will be: ? | |
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Q=Q; Q’=1
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Q=1;Q’=0
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Q = 0;Q’=0
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Q=1;Q’=1
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| 8. | The basic R-S flip-flop is ? | |
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a monostable multivibrator
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a bistable multivibrator
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an astable multivibrator
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a Schmitt trigger
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| 9. | What is the number of selector lines required in a single input n-output demultiplexer ? | |
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2
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n
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2^n
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log? n
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| 10. | If S=0, R = 1 is a SR flip-flop, ? | |
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Qn+1=Q’n
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Qn+1 = Qn
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Qn+1 = 0
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Qn+1 = 1
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