VIRTUSA Previous Years Solved Sample Placement Papers
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'In a 4-bit R/2R ladder digital-to-analog converter, because of negative feedback, the operational amplifier keeps the inverting (minus) input near ________.'
a) 5 volts
b) zero volts
c) a voltage determined by the binary weighted input
d) none of the above
Ans: b) zero volts -
'Why is the given circuit called an inverter?'
a) The output is the opposite (inverse) of the input.
b) The output is in phase with the input.
c) The output is the same as the input.
d) There is no output.
Ans: a) The output is the opposite (inverse) of the input. -
\(x\%\) of \(y\) is \(y\%\) of what?
(a) \(x/y\)
(b) \(2y\)
(c) \(x\) (Ans)
(d) Can't be determined
- Conditional results after execution of an instruction in a microprocessor are stored in:
(a) register
(b) accumulator
(c) flag register
(d) flag register part of PSW (Program Status Word) (Ans) - Starting from a point 'P' Dinesh walked 18 metres towards south. He turned to his left and walked 25 metres. He then turned to his left and walked 18 metres. He again turned to his left and walked 35 metres and reached a point 'Q'. How far is Dinesh from the point 'P' and in which direction?
a) 10 metres East
b) 10 metres West
c) 35 metres West
d) 10 metres South
Ans: b) 10 metres West - Sun : Star::
a) Day : Night
b) Lamp : Light
c) Bed : Sleep
d) Dove : Bird
Ans: d) Dove : Bird - If a person repaid Rs.22,500 after 10 years of borrowing a loan at 10% per annum simple interest find out what amount did he take as loan
a) Rs.11,225
b) Rs.11,250
c) Rs.10,000
d) Rs.7500
Ans: b) Rs.11,250 - 'A, B' and 'C' entered into partnership 'A' invested Rs.2,560 and 'B' Rs. 2,000. At end of the year they gained Rs. 1,105 out of which 'A' got Rs.320, 'C's capital was
a) Rs.4280
b) Rs.2840
c) Rs.4820
d) Rs.4028
Ans: a) Rs.4280 - A 2MB PCM (pulse code modulation) has:
(a) 32 channels
(b) 30 voice channels & 1 signalling channel
(c) 31 voice channels & 1 signalling channel (Ans)
(d) 32 channels out of which 30 voice channels, 1 signalling channel, & 1 Synchronization channel - Time taken for 1 satellite hop in voice communication is:
(a) 1/2 second (Ans)
(b) 1 second
(c) 4 seconds
(d) 2 seconds - A dishonest shopkeeper professes to sell pulses at the cost price but uses a false weight of 950 gm for a kg. His gain is ...%.
- Max number of satellite hops allowed in voice communication is:
(a) only one
(b) more than one
(c) two hops (Ans)
(d) four hops - When a 'C' function call is made, the order in which parameters passed to the function are pushed into the stack is:
(a) left to right
(b) right to left (Ans)
(c) bigger variables are moved first than the smaller variables
(d) smaller variables are moved first than the bigger ones
(e) none of the above - What is the type of signalling used between two exchanges?
(a) inband (Ans)
(b) common channel signaling
(c) any of the above
(d) none of the above - Buffering is:
(a) the process of temporarily storing the data to allow for small variation in device speeds (Ans)
(b) a method to reduce cross talks
(c) storage of data within transmitting medium until the receiver is ready to receive
(d) a method to reduce routing overhead