The Global Open University 2012-1st Year M.Sc Electronic Science Global open University Electronics of Digital System Design - Question Paper

c. (A' + B + C)(A + B' + C)
d. both (a) nad (b)
18. The number of digits in octal
system is
a.8
b.7
c.10
d. none
19. The number of digits in
Hexadecimal system is
a.15
b.17
c.16
d. 8
20. The number of bits in a nibble is
a.16
b.5
c.4
d.8
21. The digit F in Hexadecimal system
is equivalent to —— in decimal system
a.16
b.15
c.17
d. 8
22. Which of the subsequent binary
numbers is equivalent to decimal 10
a.1000
b.1100
c.1010
d.1001
23. The number FF in Hexadecimal
system is equivalent to —— in decimal
system
a.256
b.255
c.240
d.239
24. IC s are
a. analog
b. digital
c. both analog and digital
d. mostly analog
25. The rate of change of digital signals
ranging from High and Low Level is
a. very fast
b. fast
c. slow
d. very slow
26. Digital circuits mostly use
a. Diodes
b. Bipolar transistors
c. Diode and Bipolar transistors
d. Bipolar transistors and FETs
27. Logic pulser
a. generates short duration pulses
b. generate long duration pulses
c. generates long and short duration
d. none of above
28. What is the output state of an OR
gate if the inputs are 0 and 1?
a.0
b.1
c.3
d.2
29. What is the output state of an AND
gate if the inputs are 0 and 1?
a.0
b.1
c.3
d.2
30. A NOT gate has…
a. 2 inputs and 1 output
b. 1 input and 1 output
c. 1 input and 2 outputs
d. none of above
31. An OR gate has…
a. 2 inputs and 1 output
b. 1 input and 1 output
c. 1 input and 2 outputs
d. none of above
32. The output of a logic gate can be
one of 2 _____?
a. Inputs
b. Gates
c.States
d. none
33. Logic states can only be ___ or 0.
a. 3
b. 2
c.1
d.0
34. The output of a ____ gate is only 1
when all of its inputs are 1
a. NOR
b. XOR
c. AND
d. NOT
34. A NAND gate is equivalent to an
AND gate plus a …. gate put together.
a. NOR
b. NOT
c. XOR
d. none

Earning:   Approval pending.