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Number Systems and Codes problems

1. Convert binary 11001111 to hexadecimal.
Options
A. 8F₁₆
B. CE₁₆
C. DF₁₆
D. CF₁₆

Correct Answer: CF₁₆

2. Determine the decimal equivalent of the signed binary number 11110100 in 1's complement.
Options
A. 116
B. ?12
C. 11
D. 128

Correct Answer: 11

3. Convert the following hexadecimal number to binary.
C9₁₆
Options
A. 10111001₂
B. 10111011₂
C. 10011100₂
D. 11001001₂

Correct Answer: 11001001₂

4. Convert binary 01001110 to decimal.
Options
A. 4E
B. 78
C. 76
D. 116

Correct Answer: 78

5. How many binary digits are required to count to 100₁₀?
Options
A. 7
B. 2
C. 3
D. 100

Correct Answer: 7

6. The BCD number for decimal 347 is ________.
Options
A. 1100 1011 1000
B. 0011 0100 0111
C. 0011 0100 0001
D. 1100 1011 0110

Correct Answer: 0011 0100 0111

7. Assign the proper odd parity bit to the code 111001.
Options
A. 1111011
B. 1111001
C. 0111111
D. 0011111

Correct Answer: 1111001

8. When using even parity, where is the parity bit placed?
Options
A. Before the MSB
B. After the LSB
C. In the parity word
D. After the odd parity bit

Correct Answer: Before the MSB

9. Convert 59.72₁₀to BCD.
Options
A. 111011
B. 01011001.01110010
C. 1110.11
D. 0101100101110010

Correct Answer: 01011001.01110010

10. Convert hexadecimal value C1 to binary.
Options
A. 11000001
B. 1000111
C. 111000100
D. 111000001

Correct Answer: 11000001

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