- A. 19
- B. 12
- C. 27
- D. 21
Digital Electronics
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The binary number 10101 is equivalent to decimal number_____.
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Pick out the CORRECT statement:
- A. In a positional number system, each symbol represents the same value irrespective of its position
- B. The highest symbol in a position number system as a value equal to the number of symbols in the system
- C. It is not always possible to find the exact binary
- D. Each hexadecimal digit can be represented as a sequence of three binary symbols.
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In case of OR gate, no matter what the number of inputs, a_____.
- A. 1 at any input causes the output to be at logic 1
- B. 1 at any input causes the output to be at logic 0
- C. 0 any input causes the output to be at logic 0
- D. 0 at any input causes the output to be at logic 1.
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The NAND gate is AND gate followed by_____.
- A. NOT gate
- B. OR gate
- C. AND gate
- D. None of the above
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NAND. gates are preferred over others because these_____.
- A. have lower fabrication area
- B. can be used to make any gate
- C. consume least electronic power
- D. provide maximum density in a chip
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The only function of NOT gate is to_____.
- A. Stop signal
- B. Invert input signal
- C. Act as a universal gate
- D. None of the above
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When an input signal 1 is applied to a NOT gate, the output is_____.
- A. 0
- B. 1
- C. Either 0 & 1
- D. None of the above
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Digital circuit can be made by the repeated use of_____.
- A. OR gates
- B. NOT gates
- C. NAND gates
- D. None of the above
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In which of the following base systems is 123 not a valid number?
- A. Base 10
- B. Base 16
- C. Base 8
- D. Base 3
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Assuming 8 bits for data, 1 bit for parity, I start bit and 2 stop bits, the number of characters that 1200 BPS communication line can transmit is_____.
- A. 10 CPS
- B. 120 CPS
- C. 12 CPS
- D. None of the above