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Computer Networks
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Course Name
BSc IT (Bachelor of Science in Information Technology)
Subject Code BT0072 (Computer Networks )
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PART - A
PART - B
PART - C
Subject : Computer Networks
BT0072 : PART - A
| Q. 1 | Kepler's constant has the value |
| | A) | 4.1205 x I W x I C~ Km/s' |
| B) | 1.4786 x 106 KM3/S2 | | C) | 103.6 x 10' Km3/s' | | D) | 3.986x 10'Km'/s' | | | | | Q. 2 | Bell 103 answer modem ___ frequency to
transmit binary 0. |
| | A) | 1070Hz |
| B) | 2025Hz | | C) | 2225Hz | | D) | 1270Hz | | | | | Q. 3 | Bit rate of vocoders is ___ |
| | A) | 24 Kb/s |
| B) | 1.2 to 2.4 Kb/s | | C) |
12kb/s | | D) | 10kbps | | | | | Q. 4 | ___ number of channels makes a group
and ___ no. of channels makes a super group. |
| | A) | 60,120 |
| B) | 30, 60 | | C) | 12, 60 | | D) | 60,600 | | | | | Q. 5 | Effect of twisting of the cables is |
| | A) | Reduces interference |
| B) | Increases length limit | | C) | Reduces the thickness of the cable | | D) | Increases interference | | | | | Q. 6 | Double, hetero structures are used in |
| | A) | Light Emitting Diode |
| B) | Lasers | | C) | Optical detectors | | D) | Photo detectors | | | | | Q. 7 | LAN stands for |
| | A) | Land Area Network |
| B) | Land Ariel Network | | C) | Local Ariel Network | | D) | Local Area Network | | | | | Q. 8 | Which of the following formats are effective
to use? |
| | A) | Unipolar NRZ |
| B) | Polar NRZ | | C) | Bipolar RZ | | D) | Manchester NRZ | | | | | Q. 9 | The objective of spread spectrum system is |
| | A) | To limit the bandwidth used up by the signal
to just that amount it needs for its data
transmission |
| B) | To confine its output in the narrow band | | C) | To avoid interference with other signals in
the same bands | | D) | All the above | | | | | Q. 10 | To overcome aliasing the sampling rate
should be |
| | A) | Above the Nyquist rate |
| B) | Above100KHz | | C) | Greater than twice bandwidth of the signal | | D) | None of the above | | | |
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