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Placement Papers June 2012 by BEL

Details of Placement Papers June 2012 by BEL conducted by BEL for job interview.
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1.
How many digits of the DNIC (Data Network Identification Code) identify the country?

A. first three
B. first four
C. first five
D. first six
E. None of the above
Answer & Explanation
Answer: Option A

Explanation:

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2.
A station in a network forwards incoming packets by placing them on its shortest output queue. What routing algorithm is being used?

A. hot potato routing
B. flooding
C. static routing
D. delta routing
E. None of the above
Answer & Explanation
Answer: Option A

Explanation:

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3.
The probability that a single bit will be in error on a typical public telephone line using 4800 bps modem is 10 to the power -3. If no error detection mechanism is used, the residual error rate for a communication line using 9-bit frames is approximately equal to

A. 0.003
B. 0.009
C. 0.991
D. 0.999
E. None of the above
Answer & Explanation
Answer: Option B

Explanation:

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4.
Frames from one LAN can be transmitted to another LAN via the device

A. Router B. Bridge
C. Repeater D. Modem
Answer & Explanation
Answer: Option B

Explanation:

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5.
Which of the following condition is used to transmit two packets over a medium at the same time?

A. Contention
B. Collision
C. Synchronous
D. Asynchronous
E. None of the above
Answer & Explanation
Answer: Option B

Explanation:

No answer description available for this question