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Digital Computer Electronics

Digital Computer Electronics
Conversion of an octal number 1258 to its decimal number is

8710
8510
None of these
9910
9010

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Digital Computer Electronics
The output of the following gate is 0 only if at least one of the inputs is 1:

NOR gate
None of these
EX-OR gate
AND gate
OR gate

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Digital Computer Electronics
The digits used in a binary number system are _____ and _____

1 and 2
3 and 4
0 and 1
None of these
9 and 0

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Digital Computer Electronics
De Morgan's first theorem says that a NOR gate is equivalent to a bubbled _____ gate.

XAND
AND
NOR
XOR
None of these

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Digital Computer Electronics
Which of the following logic expression is wrong?

1 + 1 + 1 = 1
1 + 0=1
1+0+1 = 1
1 + 1=0
None of these

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Digital Computer Electronics
A bus is a group of _____ carrying digital signals.

transistors
gates
registers
wires
None of these

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