Telecommunications interview questions

11. What is the nominal voltage required in subscriber loop connected to local exchange?
a) +48 volts
b) -48 volts
c) 230 volts
d) 110 volts
12. To send a data packet using datagram , connection will be established…
a) before data transmission.
b) connection is not established before data transmission.
c) no connection is required.
d) none of the above.
Ans: (c)
13. Word alignment is…
a) aligning the address to the next word boundary of the machine.
b) aligning to an even boundary.
c) aligning to a word boundary.
d) none of the above.
Ans: (a)
14. 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
c) bigger variables are moved first than the smaller variales.
d) smaller variables are moved first than the bigger ones.
e) none of the above.
Ans: (b)
15. What is the type of signaling used between two exchanges?
a) inband
b) common channel signaling
c) any of the above
d) none of the above.
Ans: (a)
16. Buffering is…
a) the process of temporarily storing the data to allow for small variation in device speeds
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.
Ans: (a)
17. Memory allocation of variables declared in a program is…
a) allocated in RAM.
b) allocated in ROM.
c) allocated on stack.
d) assigned to registers.
Ans: (c)
18. A software that allows a personal computer to pretend as a computer terminal is …
a) terminal adapter
b) bulletin board
c) modem
d) terminal emulation
Ans: (d)