# ISRO CSE 2007

 Question 1
The Boolean expression $Y=(A+\bar{B}+\bar{A}B)\bar{C}$ is given by
 A $A\bar{C}$ B $B\bar{C}$ C $\bar{C}$ D AB
Digital Logic   Boolean Algebra
Question 1 Explanation:
 Question 2
The circuit shown in the following figure realizes the function.

 A $(\overline{A+B}+C)(\bar{D}\bar{E})$ B $(\overline{A+B}+C)(D\bar{E})$ C $(A+ \overline{B+C})(\bar{D}E)$ D $(A+ B+\bar{C})(\bar{D} \bar{E})$
Digital Logic   Boolean Algebra
Question 2 Explanation:

 Question 3
The circuit shown in the given figure is a

 A full adder B full subtracter C shift register D decade counter
Digital Logic   Boolean Algebra
Question 3 Explanation:
 Question 4
When two numbers are added in excess-3 code and the sum is less than 9, then in order to get the correct answer it is necessary to
 A subtract 0011 from the sum B add 0011 to the sum C subtract 0110 from the sum D add 0110 to the sum
Digital Logic   Number System
Question 4 Explanation:
 Question 5
The characteristic equation of an SR flip-flop is given by :
 A $Q_{n+1}=S+RQ_n$ B $Q_{n+1}=R\bar{Q}_n + \bar{S}Q_n$ C $Q_{n+1}=\bar{S}+RQ_n$ D $Q_{n+1}=S+\bar{R}Q_n$
Digital Logic   Sequential Circuit
Question 5 Explanation:

There are 5 questions to complete.