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6. A mod-2 counter followed by a mod-5 counter is
Same as a mode-5 counter followed by a mod- 2 counter
A decade counter
A mod-7 counter
Ripple carry Counter
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7. What is the maximum counting speed of a 4-bit binary counter which is composed of flip-flops with a propagation delay of 25 ns ?
1 MHz
10 MHz
100 MHz
8 MHz
8. A JK flip-lop has its J input connected to logic level 1 and its input to the Q output. A clock pulse is fed to its clock input. The flip-lop will now
Change its state at each clock pulse
Go to state 1 and stay there
Go to state 0 and stay there
Retain its previous state
9. Consider an RS lip-lops with both inputs set to 0. If a momentary '1' is applied at the input S,then the output
Q will flip from 0 to 1 and then back to 0
Q will flip from 1 to 0
Q will flip from 0 to 1
10. The output of a sequential circuit depends on
Present inputs only
Past outputs only
Both present and past inputs
Present outputs only
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