Computer and Microprocessor - Mechanical Engineering test questions

Computer and Microprocessor - Mechanical Engineering test questions

1) What is a 4-bit data world called?

a) Data bus.
b) Byte.
c) Band.
d) Nybble.

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2) A sequential logic circuit has ……………….as feedback element.

a) Memory.
b) Delay.
c) Either of the above.
d) None of the above.

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3) In a sequential logic circuit the output is a function of ………..inputs and ……….history of the inputs.

a) Present, previous.
b) Future, past.
c) Future, present.
d) Present, future.

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4) A sequential circuit is combinational circuit with feedback elements as:

a) Accumulators.
b) Shift registers.
c) Counters.
d) All of the above.

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5) What are the outputs of flip-flop?

a) Logically inverse of each other.
b) Multiple of input.
c) Sum of the inputs.
d) Any of the above.

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6) What is an operational amplifier?

a) A very high gain direct coupled amplifier with feedback.
b) A high gain amplifier indirectly coupled without feedback.
c) A low gain amplifier without feedback.
d) None of the above.

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7) In an ideal operational amplifier the output impedance should be zero. In practice it is in the range of:

a) Few hundred ohms to few kilo ohms.
b) Few ohms to a few hundred ohms.
c) Few kilo ohms to few mega ohms.
d) Few milliohms to one ohm.

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8) How can noise be reduced in an operational amplifier?

a) Shielding.
b) Attenuation to grounding.
c) Use of low pass filters on incoming power leads.
d) All of the above.

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9) The use of OPAMP is generally not preferred as:

a) Divider.
b) Subtractor.
c) Differentiator.
d) Integrator.

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10) Feedback in an amplifier that:

a) Increases sensitivity and reduces gain.
b) Increases sensitivity as well as gain.
c) Reduces sensitivity as well as gain.
d) Reduces sensitivity and increases gain.

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11) For a differential amplifier what should be the value of CMRR.

a) Zero.
b) Unity.
c) Small.
d) Large.

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12) What would be the preferred type of flip-flop, if one wants to design a binary counter?

a) D-type.
b) Latch.
c) JK-type.
d) SR-type.

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13) Why a NAND gate is called a universal logic element?

a) All the minimization techniques are applicable for optimum.
b) It is used by everybody.
c) Many digital computers use NAND gates.
d) Any logic function can be realized by NAND gates alone.

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14) Which among the following statements is correct regarding multiplexer?

a) It has a single input and multiple outputs.
b) It has multiple inputs and a single output.
c) It multiplies four 4-bit words.
d) It stores data in multiple bits.

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15) The ‘Boolean algebra’ is based on the premise that:

a) There are two states.
b) Data can be stored and retrieved.
c) Differential equations can be solved by analog circuits.
d) Either a statement is true or false.

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16) Which of the circuits is used in a clock generator?

a) JK flip-flop
b) A free running MV
c) Both (a) and (b)
d) None of these

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17) A toggle operation is used

a) With a gate circuit
b) With a flip-flop
c) Without a flip-flop
d) None of these

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