Digital Electronics - ECE Questions and Answers

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

In a NOT gate the output is always the opposite of the input.

True

False

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

"Micro-programming" is a technique

for programming the microprocessors

for writing small programs efficiently

for programming the control steps of a computer

for programming output/input

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

Status register in the 8156 contains information about

the timer

the ports

both (a) and (b)

none of the above

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

The noise margin of a TTL gate is about

0.2 V

0.4 V

0.6 V

0.8 V

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

TTL circuit with active pull up is preferred because of its suitability for

wired AND operation

bus operated system

wired logic operation

reasonable dissipation and speed of operation

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

A parity check usually can detect

one-bit error

double-bit error

three-bit error

any-bit error

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

Which of the following is 'synchronous'?

Half adder

Full adder

R-S flip-flop

Clocked R-S flip-flop

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

TRAP is __________ whereas RST 7.5, RST 6.5, RST 5.5 are __________ .

maskable, non-maskable

maskable, maskable

non-maskable, non-maskable

non-maskable, maskable

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

For a binary half subtractor having two inputs A and B the correct sets of logical expressions for the outputs D (A - B) and X = Borrow are

D = AB + AB, X = AB

D = AB AB, X = AB

D = AB + AB, X = AB

D = AB + A B, X = AB