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 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 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 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 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




There are 5 questions to complete.

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