Exercise: Digital Electronics

Questions for: Digital Electronics

The number of distinct Boolean expression of 4 variables is
A:
16
B:
256
C:
1024
D:
65536
Answer: D

22n = 224 = 216 .

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The hexadecimal number (3E8)16 is equal to decimal number
A:
1000
B:
982
C:
768
D:
323
Answer: A

3 x 162 + 14 x 161 + 8 = 1000.

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A counter type A/D converter contains a 4 bit binary ladder and a counter driven by a 2 MHz clock. Then conversion time
A:
8 μ sec
B:
10 μ sec
C:
2 μ sec
D:
5 μ sec
Answer: A

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Zero suppression is not used in actual practice.
A:
True
B:
False
C:
D:
Answer: B

Zero suppression is commonly used.

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For the minterm designation Y = ∑ m (1, 3, 5, 7) the complete expression is
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
Answer: B

Decimal number 1 = binary number 001 = A BC Decimal number 7 = binary number 111= ABC, Decimal number 3 = binary number 011= ABC Decimal number 5 = binary number 101= ABC . Hence result.

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