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Digital Electronics
Comments
Question
The counter in the given figure is
Options
A. Mod 3
B. Mod 6
C. Mod 8
D. Mod 7
Correct Answer
Mod 6
Explanation
When counter is 110 the counter resets. Hence mod 6.
Digital Electronics problems
Search Results
1. A full adder can be made out of
Options
A. two half adders
B. two half adders and a OR gate
C. two half adders and a NOT gate
D. three half adders
Show Answer
Scratch Pad
Discuss
Correct Answer: two half adders and a OR gate
Explanation:
2. 1's complement of 11100110 is
Options
A. 00011001
B. 10000001
C. 00011010
D. 00000000
Show Answer
Scratch Pad
Discuss
Correct Answer: 00011001
Explanation:
Replace 1 by 0 and 0 by 1.
3. In 2's complement representation the number 11100101 represents the decimal number
Options
A. +37
B. -31
C. +27
D. -27
Show Answer
Scratch Pad
Discuss
Correct Answer: -27
Explanation:
A = 11100101. Therefore
A
= 00011010 and A' =
A
+ 1 = 00011011 = 16 + 8 + 2 + 1 = 27. Therefore A = -27.
4. The number of digits in octal system is
Options
A. 8
B. 7
C. 9
D. 10
Show Answer
Scratch Pad
Discuss
Correct Answer: 8
Explanation:
The octal system has 8 digits 0 to 7.
5. Both OR and AND gates can have only two inputs.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
Explanation:
Any number of inputs are possible.
6. The hexadecimal number (3E8)
16
is equal to decimal number
Options
A. 1000
B. 982
C. 768
D. 323
Show Answer
Scratch Pad
Discuss
Correct Answer: 1000
Explanation:
3 x 16
2
+ 14 x 16
1
+ 8 = 1000.
7. A memory system of size 16 k bytes is to be designed using memory chips which have 12 address lines and 4 data lines each. The number of such chips required to design the memory system is
Options
A. 2
B. 4
C. 8
D. 18
Show Answer
Scratch Pad
Discuss
Correct Answer: 8
Explanation:
.
8. 2's complement of binary number 0101 is
Options
A. 1011
B. 1111
C. 1101
D. 1110
Show Answer
Scratch Pad
Discuss
Correct Answer: 1011
Explanation:
1's complement of 0101 is 1010 and 2's complement is 1010+1 = 1011.
9. In a ripple counter,
Options
A. whenever a flip flop sets to 1, the next higher FF toggles
B. whenever a flip flop sets to 0, the next higher FF remains unchanged
C. whenever a flip flop sets to 1, the next higher FF faces race condition
D. whenever a flip flop sets to 0, the next higher FF faces race condition
Show Answer
Scratch Pad
Discuss
Correct Answer: whenever a flip flop sets to 1, the next higher FF toggles
Explanation:
In a ripple counter the effect ripples through the counter.
10. Which device has one input and many outputs?
Options
A. Multiplexer
B. Demultiplexer
C. Counter
D. Flip flop
Show Answer
Scratch Pad
Discuss
Correct Answer: Demultiplexer
Explanation:
Demultiplexer takes data from one line and directs it to any of its N output depending on the status of its select lines.
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Spearman s correlation coefficient between epithelial and mesenchymal scores, and corresponding P value are reported
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Spearman s correlation coefficient between epithelial and mesenchymal scores, and corresponding P value are reported