Q.1.By adding inverters to the inputs and output of a AND gate we can obtain ……………
OR
AND
NOT
X-OR
Q.2.how many NAND gates are needed to realize OR gate --------------
1
2
3
4
Q.3.which is the first integrated logic family ---------------
RTL
DTL
TTL
none of these
Q.4.Which logic gate has output high if and only if all inputs are low ---------?
NOR
NAND
X-NOR
AND
Q.5.According to Boolean algebra 1+A+B+C =
A
A+B+C
1
none of these
Q.6.If a=0x6db7 and b=0x2ae9 then what is the value of a”b--------------
binary number for 1001.1101
decimal number for 19
excess-3 code for 29
none of these
Q.7.what is the value of A'+1 ?
A
A'
1
none of these
Q.8.In 4 bit number one bit indicates sign of the number then the locations are from
-8 to 8
-7 to 7
-16 to 16
None
Q.9.Avalanche photo diode is used when compared to PIN diode because
larger band width
high sensitivity
high Output
Q.10.some non zero DC voltage is to RC low pass circuit then the DC voltage in the output contains
Same as in input
Higher than input
Zero
Slightly increases
Q.11.if the output of the gate is always high then the gates applied to this logic are 0,0
NAND and EX-NOR
NAND and NOR
AND and X-NOR
OR and XOR
Q.12.Thermal Run away is not possible in FET because the flow of
minority careers
Trans conductance
Majority careers
none of these
Q.13.which of the following is/are true about 1's and 2's complements:
In 1's complement form. 0 has two representations
In 1's complement, the magnitude of lowest number is equal to the magnitude of highest number
In 2's complement, 0 has two representations
i only
i and ii
iii only
all of these
Q.14.In the hybrid parameter model of a transistor reverse transfer voltage ratio and forward transfer current ratio are respectively given by:
h11 and h21
h12 and h11
h21 and h11
None of these
Q.15.The largest negative no can be represented with 8 bits in 2's compliment representation?
-256
-255
-127
-128
Q.16.How many NAND gates required to implement AB+CD+EF
1
2
3
4
Q.17.Transparent latch is seen in which type of flip flop
SR FF
D FF
JK FF
T FF
Q.18.Odd parity generator uses which logic?
Digital
Analog
Sequential
none
Q.19.Which type of ADC is fastest?
SARC
Counter type
Intigrated type
Flash/Parallel
Q.20.Which one of the following is fastest read/writable memory?
PROM
EEPROM
Flash
none
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Q.1.Any number with an exponent of zero is equal to:
zero
one
that number
ten
Q.2.In the decimal numbering system, what is the MSD?
The middle digit of a stream of numbers
The digit to the right of the decimal point
The last digit on the right
The digit with the most weight
Q.3.Which of the following statements does NOT describe an advantage of digital technology?
The values may vary over a continuous range.
The circuits are less affected by noise.
The operation can be programmed.
Information storage is easy.
Q.4.The generic array logic (GAL) device is ________.
one-time programmable
reprogrammable
a CMOS device
reprogrammable and a CMOS device
Q.5.The range of voltages between VL(max) and VH(min) are ________.
unknown
unnecessary
unacceptable
between 2 V and 5 V
Q.6.What is a digital-to-analog converter?
It takes the digital information from an audio CD and converts it to a usable form.
It allows the use of cheaper analog techniques, which are always simpler.
It stores digital data on a hard drive.
It converts direct current to alternating current.
Q.7.What are the symbols used to represent digits in the binary number system
0,1
0,1,2
0 through 8
1,2
Q.8.A full subtracter circuit requires ________.
two inputs and two outputs
two inputs and three outputs
three inputs and one output
three inputs and two outputs
Q.9.The output of an AND gate is LOW ________.
all the time
when any input is LOW
when any input is HIGH
when all inputs are HIGH
Q.10.Give the decimal value of binary 10010.
6
9
18
20
Q.11.A mathematical operation for finding the area under the curve of a graph is called __________.
differentiation
integration
curve averaging
linear regression
Q.12.An astable multivibrator is also known as a:
one-shot multivibrator
free-running multivibrator
bistable multivibrator
monostable multivibrator
Q.13.A sample-and-hold circuit consists of _________.
An op-amp, an analog switch, and an inductor
An op-amp, an analog switch, and a capacitor
two op-amps, an analog switch, and a variable resistor
two op-amps, an analog switch, and a capacitor
Q.14.An example of potential energy is:
tea-kettle steam
a moving vehicle
the sun
a battery
Q.15.What is the applied voltage for a series RLC circuit when IT = 3 mA, VL = 30 V, VC = 18 V, and R = 1000 ohms?
3.00 V
12.37 V
34.98 V
48.00 V
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