Top 350+ Solved Digital Electronics and Logic Design MCQ Questions Answer
Q. What is the binary equivalent of the Hexadecimal number 368
a. 1111101000
b. 1101101000
c. 1101111000
d. 1.11e+09
Q. What is the binary equivalent of the decimal number 1011
a. 1111110111
b. 1111000111
c. 1111110011
d. 1.11e+09
Q. When simplified with Boolean Algebra (x + y)(x + z) simplifies to
a. x
b. x + x(y + z)
c. x(1 + yz)
d. x + yz
Q. What should be done to unused inputs on TTL gates?
a. they should be left disconnected so as not to produce a load on any of the other circuits and to minimize power loading on the voltage source.
b. all unused gates should be connected together and tied to v through a 1 k resistor.
c. all unused inputs should be connected to an unused output; this will ensure compatible loading on both the unused inputs and unused outputs.
d. unused and and nandinputs should be tied to vccthrough a 1 k resistor; unused or and norinputs should be grounde
Q. Assume that a particular IC has a supply voltage (Vcc) equal to +5 V and ICCH = 10 mA and ICCL = 23 mA. What is the power dissipation for the chip?
a. 50 mw
b. 82.5 mw
c. 115 mw
d. 165 mw
Q. When is a level-shifter circuit needed in interfacing logic?
a. a level shifter is always needed.
b. a level shifter is never needed.
c. when the supply voltages are the same
d. when the supply voltages are different
Q. A TTL totem-pole circuit is designed so that the output transistors:
a. are always on together
b. provide linear phase splitting
c. provide voltage regulation
d. are never on together