ELECTRONICS & COMMUNICATION
Study Materials MCQ
Various Competitive Examinations
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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