Top 350+ Solved Digital Electronics and Logic Design MCQ Questions Answer
Q. The boolean expression X = AB + CD represents
a. two ors anded together
b. a 4-input and gate
c. two ands ored together
d. an exclusive- or
Q. The expression is an example of Commutative Law for Multiplication.
a. ab+c = a+bc
b. a(b+c) = b(a+c)
c. ab=ba
d. a+b=b+a
Q. The total amount of memory that is supported by any digital system depends upon
a. the organization of memory
b. the structure of memory
c. the size of decoding unit
d. the size of the address bus of the microproc essor
Q. In which of the following base systems is 123 not a valid number?
a. base 10
b. base 16
c. base8
d. base 3
Q. A NAND gate is called a universal logic element because
a. it is used by everybody
b. any logic function can be realized by nand gates alone
c. all the minization techniques are applicable for optimum nand gate realization
d. many digital computers use nand gates.
Q. Digital computers are more widely used as compared to analog computers, because they are
a. less expensive
b. always more accurate and faster
c. useful over wider ranges of problem types
d. easier to maintain.
Q. Most of the digital computers do not have floating point hardware because
a. floating point hardware is costly
b. it is slower than software
c. it is not possible to perform floating point addition by hardware
d. of no specific reason.
Q. The number 1000 would appear just immediately after
a. ffff (hex)
b. 1111
c. 7777 (octal)
d. all of the
Q. The number of Boolean functions that can be generated by n variables is equal to
a. 2n
b. 22 n
c. 2n-1
d. — 2n