List Of Essential Telecommunications Interview Questions
Q – 1 Max number of satellite hops allowed in voice communication is:
a) only one
b) more han one
c) two hops
d) four hops
Ans- Max number of satellite hops allowed in voice communication is two hops
Q – 2 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- Word alignment is aligning the address to the next word boundary of the machine.
Q – 3 What action is taken when the processor under execution is interrupted by a non-maskable interrupt?
a) Processor serves the interrupt request after completing the execution of the current instruction.
b) Processor serves the interrupt request after completing the current task.
c) Processor serves the interrupt request immediately.
d) Processor serving the interrupt request depends upon the priority of the current task under execution.
Ans- Processor serves the interrupt request after completing the execution of the current instruction.
Q – 5 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- Software that allows a personal computer to pretend as a computer terminal is Terminal Emulation
Q – 6 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- Type of signaling used between two exchanges is inband
Q – 7 Frequency at which VOICE is sampled is?
a) 4 KHz
b) 8 KHz
c) 16 KHz
d) 64 KHz
Ans- b
Q – 8 What is the maximal decimal number that can be accommodated in a byte?
a) 128
b) 256
c) 255
d) 512
Ans- 256.
Q – 9 The status of the Kernel is?
a) task
b) process
c) not defined.
d) none of the above.
Ans- The status of the Kernel is process
Q – 10 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
Ans- 48 volts. This -48 volts is required by the copper wires to prevent it from corroded & eluded.
Q – 11 Conditional results after execution of an instruction in a micro processor is stored in?
a) register
b) accumulator
c) flag register
d) flag register part of PSW(Program Status Word)
Ans- flag register part of PSW(Program Status Word)
Q – 12 Purpose of PC(Program Counter) in a Microprocessor is?
a) To store address of TOS(Top Of Stack)
b) To store address of next instruction to be executed.
c) count the number of instructions.
d) to store base address of the stack.
Ans- To store address of next instruction to be executed.
Q – 13 What is the need of CPG message in ISUP protocol?
Ans- Consider any call forwarding scenario.As soon as switch receives Setup, it checks that the Called_Party has forwarded option activated and so tries to forward the call. Meanwhile, Switch sends CPG message towards originator saying that Call is in Progress.
Q – 14 Line of sight is?
a) Straight Line
b) Parabolic
c) Tx & Rx should be visible to each other
d) none of the above
Ans- The line of sight is the distance or the path up to which the the TX and the RX is visible to each other because for the proper transmission there should be a ink or connectivity b/w the TX and the RX e.g. at the RF transmission the microwave links are required for the connectivity and data transmission.
Q – 15 Time taken for 1 satellite hop in voice communication is?
a) 1/2 second
b) 1 seconds
c) 4 seconds
d) 2 seconds
Ans- 1/2 second
Q – 16 What is TCSM ?
Ans- TRANSCODER SUBMULTIPLEXER
Q – 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- a)allocated in RAM.
Q – 18 A 2MB PCM(pulse code modulation) has?
a) 32 channels
b) 30 voice channels & 1 signaling channel.
c) 31 voice channels & 1 signaling channel.
d) 32 channels out of which 30 voice channels, 1 signaling channel, & 1 synchronization channel.
Ans- Answer is D.
Q – 19 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)
Q – 20 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 variables.
d) smaller variables are moved first than the bigger ones.
e) none of the above.
Ans- (b)
Q – 21 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- C
Q – 22 What is the best Rx power and Tx power at good RF Conditions?
Ans- If u r talking in the sense of Satellite then
it is 6 GHz uplink that is for transmitter and 4 Ghz for downlink frequency that is receiver frequency.
Q – 23 What is a matrix in Telecommunication?
Ans- It is a rectangular table of elements, which may be any abstract quantities that can be added an multiplied i.e m*n where m is row and n is columns.
Q – 24 How to explain what is ss7?
Ans- Common Channel Signaling System No. 7 (i.e., SS7 or C7) is a global standard for telecommunications defined by the International Telecommunication Union (ITU) Telecommunication Standardization Sector (ITU-T). The standard defines the procedures and protocol by which network elements in the public switched telephone network (PSTN) exchange information over a digital signaling network to effect wireless (cellular) and wireline call setup, routing and control.