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Digital Electronics

Digital Electronics
In which of the following base systems is 123 not a valid number?

Base 3
Base 10
Base 8
Base 16

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Digital Electronics
The Quine– McClusky method of minimization of a logic expression is a (i) graphical method (ii) algebraic method (iii) tabular method (iv) a computer-oriented algorithm The correct answers are

 (i) and (iii)
 (iii) and (iv)
 (i) and (ii)
 (ii) and (iv)

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Digital Electronics
ASCII and EBCDIC codes are

 error correcting codes
 BCD codes
 alphanumeric codes
 numeric codes

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Digital Electronics
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.

None of these
10 CPS
12 CPS
120 CPS

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Digital Electronics
The parity of the binary number 11011001 is

 same as the number of zeros
 even
 odd
 not known

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Digital Electronics
In LSI, the number of gate circuits per chip is

 100 to 9,999
 < 10,000
 100 to 999
 1000 to 10,000

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