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Electronics and Communication Engineering - Digital Electronics

Exercise : Digital Electronics - Section 1
36.
7BF16 = __________ 2
0111 1011 1110
0111 1011 1111
0111 1011 0111
0111 1011 0011
Answer: Option
Explanation:

7BF16 = 7 x 162 + 11 x 161 + 15 x 160 = 1983 in decimal = 0111 1011 1111 in binary.

37.
For the minterm designation Y = ∑ m (1, 3, 5, 7) the complete expression is
Y = A BC + A B C
Y = A B C + A B C + ABC + A BC
Y = A B C + A B C + ABC + A BC
Y = A B C + ABC + A BC + A BC
Answer: Option
Explanation:

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.

38.
Zero suppression is not used in actual practice.
True
False
Answer: Option
Explanation:

Zero suppression is commonly used.

39.
A counter type A/D converter contains a 4 bit binary ladder and a counter driven by a 2 MHz clock. Then conversion time
8 μ sec
10 μ sec
2 μ sec
5 μ sec
Answer: Option
Explanation:

40.
The hexadecimal number (3E8)16 is equal to decimal number
1000
982
768
323
Answer: Option
Explanation:

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

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