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Digital Electronics

Digital Electronics
Which one of the following is not a vectored interrupt?

 RST 7.5.
 TRAP.
 INTR.
 RST 6.5.

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Digital Electronics
The voltage levels for negative logic system

 may be negative or positive
 must necessarily be negative
 must necessarily be 0 V and –5 V
 must necessarily be positive

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Digital Electronics
Which of the following gate is a two-level logic gate

NOT gate
OR gate
NAND gate
EXCLUSIVE OR gate

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Digital Electronics
Which one of the following even parity codes are in errors. (I)100110010 (II)011101010 (III)10111111010001010

 Both (I)&(III)
 Both (II)&(III)
 Only (II)
 Only (III)

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Digital Electronics
A half adder is a ________ circuit.

 Combinational
 Both A and B
 Sequential
 None

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Digital Electronics
The devices commonly used for making digital circuits are

 relays
 semiconductor devices
 mechanical switches
 contact switches

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