LG Previous Years Solved Sample Placement Papers
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As the forward current through a silicon diode increases, the internal resistance:
A) Increases
B) Decreases
C) Remains the same
Ans: C -
What occurs when a conduction-band electron loses energy and falls back into a hole in the valence band?
A) Doping
B) Recombination
C) Generation
Ans: B -
What is the voltage measured from the negative terminal of C4 to the negative terminal of the transformer?
A) –10 V
B) –20 V
C) 10 V
D) 20 V
Ans: B -
Calculate the output of the second stage op-amp if V1 = 25 mV:
A) –0.075 V
B) 0.525 V
C) 0.06 V
D) 4.2 V
Ans: A -
The gain of the multiple-feedback band-pass filter is equal to which of the following? Assume C = C1 = C2.
A) A₀ = R2 / R1
B) A₀ = R1 / R2
C) A₀ = R2 / 2R1
D) A₀ = R1 / 2R2
Ans: C - Identify the frequency response curve for a band-pass filter.
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Which filter has a maximally flat response?
A) Bessel
B) Butterworth
C) Chebyshev
D) All of the above
Ans: B -
Which of the following FETs has the lowest input impedance?
A) JFET
B) MOSFET depletion-type
C) MOSFET enhancement-type
D) None of the above
Ans: A -
How many unique symbols are used in the decimal number system?
A) One
B) Nine
C) Ten
D) Unlimited
Ans: C -
With interrupt-driven I/O, if two or more devices request service at the same time, ________.
A) The device closest to the CPU gets priority
B) The device that is fastest gets priority
C) The device assigned the highest priority is serviced first
D) The system is likely to crash
Ans: C -
The logic gate that will have a LOW output when any one of its inputs is HIGH is the:
A) NAND gate
B) AND gate
C) NOR gate
D) OR gate
Ans: C -
The register in the 8085A that is used to keep track of the memory address of the next op-code to be run in the program is the:
A) Stack pointer
B) Program counter
C) Instruction pointer
D) Accumulator
Ans: B