The greatest negative number which can be stored is 8 bit computer using 2's com

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Question
The greatest negative number which can be stored is 8 bit computer using 2's complement arithmetic is
Options
A. - 256
B. - 128
C. - 255
D. - 127

Correct Answer

- 128

Explanation

The largest negative number is 1000 0000 = -128.

Digital Electronics problems

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1. Which device has one input and many outputs?
Options
A. Multiplexer
B. Demultiplexer
C. Counter
D. Flip flop

2. 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

3. 2's complement of binary number 0101 is
Options
A. 1011
B. 1111
C. 1101
D. 1110

4. 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

6. For the minterm designation Y = ? m (1, 3, 5, 7) the complete expression is
Options
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

9. An AND gate has two inputs A and B and one inhibit input 3, Output is 1 if
Options
A. A = 1, B = 1, S = 1
B. A = 1, B = 1, S = 0
C. A = 1, B = 0, S = 1
D. A = 1, B = 0, S = 0

10. The fixed count that should be used so that the output register will represent the input for a 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000).
Options
A. 000110
B. 0010
C. 1111
D. 011101

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