B:-5 MHz

C:-3.34 MHz

D:-1.67 MHz

Correct Answer:- Option-D

Question40:-A JK flip-flop with J = 1, K = 1 has a clock signal with frequency of 10
KHz. The Q output is

A:-Always 1

B:-Always 0

C:-5 KHz square wave
D:-10 KHz square wave
Correct Answer:- Option-C

Question41:-A 4 bit asynchronous binary counter with negative edge triggered D
flip-flops with propagation delay of 10 ns. What is the highest frequency allowed for

the counter to operate reliably, avoiding timing issues caused by propagation delay
?

A:-40 MHz
B:-80 MHz
C:-25 MHz
D:-50 MHz
Correct Answer:- Option-C

Question42:-A 12 bit Analog to Digital Converter (ADC) is used with a voltage range
0 to 5 volt. What is the possible value for voltage resolution ?

A:-2.44 milli volts
B:-0.416 micro volts
C:-1.22 milli volts

D:-2.4 micro volts

Correct Answer:- Option-C

Question43:-Maximum possible signal to Noise Ratio of an 8 bit ADC considering
the effect of quantisation noise is

A:-49.8 dB
B:-256 dB
C:-128 dB
D:-64 dB
Correct Answer:- Option-A
Question44:-The conversion time of n bit flash type ADC with clock period T is
A:-nT
B:-(n-1)T
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