In the circuit shown below input1 input2 and output are all

In the circuit shown below, input1, input2 and output are all initially 0.

If input1 changes from 0 to 1, what would be the effect on output?
If input1 then changes back from 1 to 0, what would be the effect on output?   
If next, input2 changes from 0 to 1, what would be the effect on output?
If input2 then changes from 1 to 0, what would be the effect on output?

input1 output input

Solution

1)

Initially:

input2 -> 0

input1 -> 1

output -> 0

At And gate input2 -> 1

At And gate 2 nd input -> 0

And gate output (1 and 0) -> 0

output of or gate (1 or 0) -> 1

output -> 1

2)

input2 -> 0

input1 -> 0

output -> 1

At And gate input2 (not 0) -> 1

At And gate 2 nd input -> 1

And gate output (1 and 1) -> 1

output of or gate (0 or 1) -> 1

output -> 1

3)

input2 -> 1

input1 -> 0

output -> 1

At And gate input2 (not 1) -> 0

At And gate 2 nd input -> 1

And gate output (1 and 0) -> 0

output of or gate (0 or 0) -> 0

output -> 0

4)

input2 -> 0

input1 -> 0

output -> 0

At And gate input2 (not 0) -> 1

At And gate 2 nd input -> 0

And gate output (1 and 0) -> 0

output of or gate (0 or 0) -> 0

output -> 0