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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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