BARC 2020: Digital Logic Nuclear Quiz 1 (App update required to attempt this test)

Convert the following decimal number 38 into a hexadecimal number.

Write the minimal POS expression for a given function:

f(A,B,C,D) = M( 1 , 5 , 7 , 10 , 12 , 13 , 15 )

Let A= 1100 1010 and B= 0000 0100 be two 8-bit 2's complement numbers. Their product in 2's complement is _______.

Consider the following circuit:

The above circuit counts from 0 to ____.

How many full adders needed to construct 8-bit parallel adder?

Given a logic circuit below

What is the output of above circuit if y1, y2, y3 is a binary number?

The orange box in the below figure consists of a minimum complexity circuit that uses only AND , OR and NOT gates. The function f(x,y,z) = 1 where any of the following conditions are satisfied :

•  x is not equal to y and z is grounded
•  y is equal to z , and x is set low
•  x is equal to y , y is equal to z but x not equal to z

Then which of the following equations leads to correct design for the minimum complexity circuit :