MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which tells about low level transmission and framing? |
| A. | v series |
| B. | x series |
| C. | g series |
| D. | q series |
| Answer» D. q series | |
| 2. |
Which uses UDP? |
| A. | echo |
| B. | time |
| C. | domain name server |
| D. | all of the mentioned |
| Answer» E. | |
| 3. |
Which is connection oriented and which is connection-less? |
| A. | datagrams, virtual circuits |
| B. | virtual circuits, datagrams |
| C. | datagrams |
| D. | none of the mentioned |
| Answer» C. datagrams | |
| 4. |
Which uses TCP? |
| A. | simple mail transfer protocol |
| B. | simple network management protocol |
| C. | simple mail transfer & network management protocol |
| D. | none of the mentioned |
| Answer» B. simple network management protocol | |
| 5. |
Routing is performed only centrally. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 6. |
Routing is |
| A. | static |
| B. | dynamic |
| C. | static & dynamic |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 7. |
Window given the number of |
| A. | bytes |
| B. | frames |
| C. | bytes & frames |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 8. |
The time required to transmit frame depends on |
| A. | frame size |
| B. | channel capacity |
| C. | frame size & channel capacity |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 9. |
In wireless network an extended service set is a set of |
| A. | connected basic service sets |
| B. | all stations |
| C. | all access points |
| D. | connected access points |
| Answer» B. all stations | |
| 10. |
Mostly                  is used in wireless LAN. |
| A. | time division multiplexing |
| B. | orthogonal frequency division multiplexing |
| C. | space division multiplexing |
| D. | channel division multiplexing |
| Answer» C. space division multiplexing | |
| 11. |
A wireless network interface controller can work in |
| A. | infrastructure mode |
| B. | ad-hoc mode |
| C. | both infrastructure mode and ad-hoc mode |
| D. | wds mode |
| Answer» D. wds mode | |
| 12. |
In wireless distribution system |
| A. | multiple access point are inter-connected with each other |
| B. | there is no access point |
| C. | only one access point exists |
| D. | access points are not required |
| Answer» B. there is no access point | |
| 13. |
Which multiple access technique is used by IEEE 802.11 standard for wireless LAN? |
| A. | cdma |
| B. | csma/ca |
| C. | aloha |
| D. | csma/cd |
| Answer» C. aloha | |
| 14. |
In wireless ad-hoc network |
| A. | access point is not required |
| B. | access point is must |
| C. | nodes are not required |
| D. | all nodes are access points |
| Answer» B. access point is must | |
| 15. |
The maximum size of payload field in ethernet frame is |
| A. | 1000 bytes |
| B. | 1200 bytes |
| C. | 1300 bytes |
| D. | 1500 bytes |
| Answer» E. | |
| 16. |
High speed ethernet works on |
| A. | coaxial cable |
| B. | twisted pair cable |
| C. | optical fiber |
| D. | unshielded twisted pair cable |
| Answer» D. unshielded twisted pair cable | |
| 17. |
An ethernet frame that is less than the IEEE 802.3 minimum length of 64 octets is called |
| A. | short frame |
| B. | runt frame |
| C. | mini frame |
| D. | man frame |
| Answer» C. mini frame | |
| 18. |
Ethernet in metropolitan area network (MAN) can be used as |
| A. | pure ethernet |
| B. | ethernet over sdh |
| C. | ethernet over mpls |
| D. | all of the mentioned |
| Answer» E. | |
| 19. |
What is autonegotiation? |
| A. | a procedure by which two connected devices choose common transmission parameters |
| B. | a security algorithm |
| C. | a routing algorithm |
| D. | encryption algorithm |
| Answer» B. a security algorithm | |
| 20. |
A point-to-point protocol over ethernet is a network protocol for |
| A. | encapsulating ppp frames inside ethernet frames |
| B. | encapsulating ehternet framse inside ppp frames |
| C. | for security of ethernet frames |
| D. | for security of ppp frames |
| Answer» B. encapsulating ehternet framse inside ppp frames | |
| 21. |
MAC address is of |
| A. | 24 bits |
| B. | 36 bits |
| C. | 42 bits |
| D. | 48 bits |
| Answer» E. | |
| 22. |
CRC uses |
| A. | multiplication |
| B. | binary division |
| C. | multiplication & binary division |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 23. |
Which is more efficient? |
| A. | parity check |
| B. | cyclic redundancy check |
| C. | parity & cyclic redundancy check |
| D. | none of the mentioned |
| Answer» C. parity & cyclic redundancy check | |
| 24. |
Which can detect two bit errors? |
| A. | parity check |
| B. | cyclic redundancy check |
| C. | parity & cyclic redundancy check |
| D. | none of the mentioned |
| Answer» C. parity & cyclic redundancy check | |
| 25. |
How error detection and correction is done? |
| A. | by passing it through equalizer |
| B. | by passing it through filter |
| C. | by amplifying it |
| D. | by adding redundancy bits |
| Answer» E. | |
| 26. |
In synchronous transmission, receiver must stay synchronous for |
| A. | 4 bits |
| B. | 8 bits |
| C. | 9 bits |
| D. | 16 bits |
| Answer» D. 16 bits | |
| 27. |
Which has continuous transmission? |
| A. | asynchronous |
| B. | synchronous |
| C. | asynchronous & synchronous |
| D. | none of the mentioned |
| Answer» C. asynchronous & synchronous | |
| 28. |
Which has comparatively high frequency component? |
| A. | sine wave |
| B. | cosine wave |
| C. | square wave |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 29. |
Which requires bit transitions? |
| A. | asynchronous |
| B. | synchronous |
| C. | asynchronous & synchronous |
| D. | none of the mentioned |
| Answer» C. asynchronous & synchronous | |
| 30. |
Which can be used as an intermediate device in between transmitter entity and receiver entity? |
| A. | ip router |
| B. | microwave router |
| C. | telephone switch |
| D. | all of the mentioned |
| Answer» E. | |
| 31. |
In layering, n layers provide service to |
| A. | n layer |
| B. | n-1 layer |
| C. | n+1 layer |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 32. |
The technique of temporarily delaying outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is called |
| A. | piggybacking |
| B. | cyclic redundancy check |
| C. | fletcher’s checksum |
| D. | parity check |
| Answer» B. cyclic redundancy check | |
| 33. |
Automatic repeat request error management mechanism is provided by |
| A. | logical link control sublayer |
| B. | media access control sublayer |
| C. | network interface control sublayer |
| D. | application access control sublayer |
| Answer» B. media access control sublayer | |
| 34. |
Which of the following is the multiple access protocol for channel access control? |
| A. | csma/cd |
| B. | csma/ca |
| C. | both csma/cd & csma/ca |
| D. | hdlc |
| Answer» D. hdlc | |
| 35. |
When 2 or more bits in a data unit has been changed during the transmission, the error is called |
| A. | random error |
| B. | burst error |
| C. | inverted error |
| D. | double error |
| Answer» C. inverted error | |
| 36. |
Header of a frame generally contains |
| A. | synchronization bytes |
| B. | addresses |
| C. | frame identifier |
| D. | all of the mentioned |
| Answer» E. | |
| 37. |
Which sublayer of the data link layer performs data link functions that depend upon the type of medium? |
| A. | logical link control sublayer |
| B. | media access control sublayer |
| C. | network interface control sublayer |
| D. | error control sublayer |
| Answer» C. network interface control sublayer | |
| 38. |
Which are non negative functions? |
| A. | |
| B. | pmf |
| C. | pdf & pmf |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 39. |
Cumulative distributive function is |
| A. | non negative |
| B. | non decreasing |
| C. | non negative & decreasing |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 40. |
Constellation diagram is plotted in |
| A. | constellation space |
| B. | signal space |
| C. | orthogonal space |
| D. | boundary space |
| Answer» C. orthogonal space | |
| 41. |
A band-pass signal has |
| A. | dc component |
| B. | no dc component |
| C. | no side lobes |
| D. | cannot be determined |
| Answer» C. no side lobes | |
| 42. |
Which are orthonormal signal representation? |
| A. | sine and cosine at same frequency |
| B. | wavelets |
| C. | complex sinusoids at a different frequency |
| D. | all of the mentioned |
| Answer» E. | |
| 43. |
A band-pass signal has a Fourier transform equal to |
| A. | one |
| B. | zero |
| C. | infinity |
| D. | cannot be determined |
| Answer» C. infinity | |
| 44. |
Which can be used for periodic and non periodic? |
| A. | fourier series |
| B. | fourier transforms |
| C. | fourier series & transforms |
| D. | none of the mentioned |
| Answer» C. fourier series & transforms | |
| 45. |
Random things in a communication system are |
| A. | timing offset |
| B. | device frequency |
| C. | attenuation |
| D. | all of the mentioned |
| Answer» E. | |
| 46. |
Fourier transform of a signal gives the |
| A. | frequency content |
| B. | bandwidth |
| C. | frequency content & bandwidth |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 47. |
A band-pass signal can be down-converted using |
| A. | sine wave |
| B. | cosine wave |
| C. | time delayed wave |
| D. | none of the mentioned |
| Answer» C. time delayed wave | |
| 48. |
In down-conversion multiplication with cosine wave is followed by |
| A. | low pass filter |
| B. | high pass filter |
| C. | bandpass filter |
| D. | bandstop filter |
| Answer» B. high pass filter | |
| 49. |
A base-band signal can be up-converted using |
| A. | sine wave |
| B. | cosine wave |
| C. | filtering |
| D. | none of the mentioned |
| Answer» C. filtering | |
| 50. |
Properties of Fourier transform are |
| A. | duality property |
| B. | time shifting property |
| C. | modulation property |
| D. | all of the mentioned |
| Answer» E. | |