7BF16 = __________ 2 0111 1011 1110 0111 1011 1111 0111 1011 0111 0111 1011 0011

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Correct Answer

0111 1011 1111

Explanation

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

Digital Electronics problems

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1. BCD input 1000 is fed to a 7 segment display through a BCD to 7 segment decoder/driver. The segments which will lit up are
Options
A. a, b, d
B. a, b, c
C. all
D. a, b, g, c, d

3. A 12 bit ADC is used to convert analog voltage of 0 to 10 V into digital. The resolution is
Options
A. 2.44 mV
B. 24.4 mV
C. 1.2 V
D. none of the above

4. A device which converts BCD to seven segment is called
Options
A. encoder
B. decoder
C. multiplexer
D. none of these

5. Which of the following is non-saturating?
Options
A. TTL
B. CMOS
C. ECL
D. Both (a) and (b)

7. In a BCD to 7 segment decoder the minimum and maximum number of outputs active at any time is
Options
A. 2 and 7
B. 3 and 7
C. 1 and 6
D. 3 and 6

10. A three state switch has three outputs. These are
Options
A. low, low and high
B. low, high, high
C. low. floating, low
D. low, high, floating

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