Question

Prepare the truth table for given logical diagrams. Write the expression for output and name the output function.

Answer 1

Hello Buddy!!

Here the given logic diagram consists of And Gate as well as Not Gate...
this logic diagram is also called as bubbled And gate

we know that
"The NOR gate is equivalent to bubbled AND gate"
or
"The complement of a sum equals the product of complements"

For the Output expression and truth table do refer the attachment

Answer 2

Given : input A

input B

Inverted inputs after passing through NOT GATES are A' and B'.

A----B-------A'---------B'-------A'.B'(Y)

0-----0------1-----------1----------1

0------1------1-----------0---------0

1-------0------0----------1---------0

1--------1------0---------0--------0

Output gate = NOR Gate

Output expression = A'.B'

Output function = reverse of OR gate