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AXES placement papers ------- placement paper 1
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AXES placement papers
Axes Networking questions
1. A 2MB PCM(pulse code modulation) has
a) 32 channels
b) 30 voice channels & 1 signalling channel.
c) 31 voice channels & 1 signalling channel.
d) 32 channels out of which 30 voice channels, 1 signalling
channel, & 1 Synchronizatio channel.
Ans: (c)
2. Time taken for 1 satellite hop in voice communication is
a) 1/2 second
b) 1 seconds
c) 4 seconds
d) 2 seconds
Ans: (a)
3. Max number of satellite hops allowed in voice
communication is :
a) only one
b) more han one
c) two hops
d) four hops
Ans: (c)
4. What is the max. decimal number that can be accomodated
in a byte.
a) 128
b) 256
c) 255
d) 512
Ans: (c)
5. 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: (d)
6. Frequency at which VOICE is sampled is
a) 4 Khz
b) 8 Khz
c) 16 Khz
d) 64 Khz
Ans: (a)
7. Line of Sight is
a) Straight Line
b) Parabolic
c) Tx & Rx should be visible to each other
d) none
Ans: (c)
8. 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: (b)
9. 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 interupt request after completing
the current task.
c) Processor serves the interupt request immediately.
d) Processor serving the interrupt request depends upon the
priority of the current task under execution.
Ans: (a)
10. The status of the Kernel is
a) task
b) process
c) not defined.
d) none of the above.
Ans: (b)
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 allignment is
a) alligning the address to the next word boundary of the
machine.
b) alligning to even boundary.
c) alligning to 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 signalling used between two
exchanges?
a) inband
b) common channel signalling
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. A protocol is a set of rules governing a time sequence
of events that must take place between
a) peers
b) non-peers
c) allocated on stack
d) assigned to registers.
18. 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)
19. 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)
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--------------------
C questions
The following questions (Q20-Q33) are of a slightly
different pattern than those above and may also be asked:
20. Find the output of the following program
int *p,*q;
p=(int *)1000;
q=(int *)2000;
printf("%d",(q-p));
Ans: 500
21. What does the statement int(*x[])() indicate?
22. Which addressing mode is used in the following
statements:
(a) MVI B,55
(b) MOV B,A
(c) MOV M,A
Ans. (a) Immediate addressing mode.
(b) Register Addressing Mode
(c) Direct addressing mode
23. RS-232C standard is used in _____________.
Ans. Serial I/O
24. How are parameters passed to the main function?
25. What does the file stdio.h contain?
a) functin definition
b) function decleration
c) both func. defn & func. decleration.
26. sscanf is used for ?
27. Memory. Management in Operating Systems is done by
a) Memory Management Unit
b) Memory management software of the Operating System
c) Kernel
Ans: (b)
28. What does the statement strcat(S2,S1) do?
29. TCP(Transmission Control Protocol) is Connection
Oriented and used in ______________ layer?
30. IP(Internet Protocol) is connectionless and used in
_________________ layer?
31. For LAN Netwrok layer is not required. Why?
32. What is done for a Push opertion?
Ans: SP is decremented and then the value is stored.
33. Describe the following structures as
LIFO/FILO/FIFO/LILO
(a) Stack
(b) Queue
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