McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Electronics and Telecommunication Engineering [ENTC] .
| 51. |
>___________allows the same time or frequency division multiplexing to be reused across non overlapping clusters |
| A. | migration |
| B. | clustering |
| C. | classification |
| D. | centralization |
| Answer» B. clustering | |
| 52. |
The more capable nodes can naturally play the role of __________ |
| A. | cluster leader |
| B. | cluster node |
| C. | cluster head |
| D. | cluster master |
| Answer» C. cluster head | |
| 53. |
__________are nodes that aid in passing traffic from one cluster to another |
| A. | gateway |
| B. | gradient |
| C. | router |
| D. | termional node |
| Answer» A. gateway | |
| 54. |
In wireless sensor network |
| A. | no special master clocks are available |
| B. | connections are ephemeral |
| C. | communication delays are inconsistent and unpredictable |
| D. | all of above |
| Answer» D. all of above | |
| 55. |
In wireless sensor network |
| A. | communication delays are consistent and predictable |
| B. | no special master clocks are available |
| C. | neither a nor b |
| D. | a and b both |
| Answer» B. no special master clocks are available | |
| 56. |
Time difference caused by the lack of a common time origin are referred to as___________ |
| A. | clock phase difference |
| B. | clock bias |
| C. | neither a nor b |
| D. | a and b both |
| Answer» D. a and b both | |
| 57. |
Drawbacks of GPS to use in WSN node is |
| A. | gps receivers are difficult to incorporate into every sensor node due to cost, power consumption, large form factors |
| B. | gps systems do not work indoor or under ford foliage or in other expectable conditions |
| C. | neither a nor b |
| D. | a and b both |
| Answer» D. a and b both | |
| 58. |
_____sensor can be tasked to look for animals of a particular size and color. _____sensor can be tasked to detect the presence of a particular type of vehicle |
| A. | i. acoustic ii. camera |
| B. | i. camera ii. acoustic |
| C. | i. camera ii. camera |
| D. | i. acoustic ii. acoustic |
| Answer» B. i. camera ii. acoustic | |
| 59. |
select the correct statement |
| A. | the purpose of a sensor system is to obtain information that is as extensive and detailed as possible about the unknown parts of the world state |
| B. | the main idea of information based sensor tasking is to base sensor selection decisions on information content as well as constraints on resource consumption, latency and other costs |
| C. | a and b both correct |
| D. | a and b both incorrect |
| Answer» C. a and b both correct | |
| 60. |
In __________sensor network systems, we must balance the information contribution of individual sensors against the cost of communicating with them |
| A. | centralized |
| B. | distributed |
| C. | centralized as well as distributed |
| D. | none of above |
| Answer» B. distributed | |
| 61. |
From a data storage point of view ,one may think of a sensor network as a distributed database that |
| A. | collects physical measurements about the environment |
| B. | indexes them |
| C. | serves queries from users and other applications external to or from within the network |
| D. | all of above |
| Answer» D. all of above | |
| 62. |
In__________ database systems, data storage may be allocated among several geographical separated locations, connected by a communications network |
| A. | centralized |
| B. | distributed |
| C. | centralized as well as distributed |
| D. | none of above |
| Answer» B. distributed | |
| 63. |
Each sensor in a sensor network takes___________ measurements of physical phenomena such as heat, sound, light ,pressure or motion |
| A. | time stamped |
| B. | time sequenced |
| C. | time sequenced as wella as time stamped |
| D. | either time sequenced or time stamped |
| Answer» A. time stamped | |
| 64. |
The challenge in sensor network databases is/ are |
| A. | the system as a whole is highly volatile |
| B. | relational tables are not static since new data is continuously being sensed |
| C. | the high energy cost of communication encourages in-networking processing during query execution |
| D. | all of the above |
| Answer» D. all of the above | |
| 65. |
The challenges in sensor network databases
|
| A. | a only |
| B. | b only |
| C. | neither a nor b |
| D. | a and b both |
| Answer» D. a and b both | |
| 66. |
The size of wireless sensor system is limited mostly by A: the cost of maintaining communication links B: the cost of sensor hardware |
| A. | a |
| B. | b |
| C. | both |
| D. | neither a nor b |
| Answer» C. both | |
| 67. |
Following are application areas of wireless sensor network a: asset and warehouse management b: automotive c: building monitoring and control d: environmental monitoring |
| A. | a b c |
| B. | b c d |
| C. | a c d |
| D. | a b c d |
| Answer» D. a b c d | |
| 68. |
Following are application areas of wireless sensor networks a: health care b: industrial process control c: military battlefield awareness d: security and surveillance |
| A. | a b c |
| B. | b c d |
| C. | a c d |
| D. | a b c d |
| Answer» D. a b c d | |
| 69. |
Sensors may be used a: to monitor and track assets such as trucks or other equipment b: to manage assets for industries such as oil and gas, utility , and aerospace |
| A. | a |
| B. | b |
| C. | both |
| D. | neither a nor b |
| Answer» C. both | |
| 70. |
Sensors can be used a: to monitor conditions and movements of wild animals or plants in wildlife habitats b: to monitor air quality and track environmental pollutants, wildfires or other natural or manmade disasters c: to monitor biological or chemical hazards to provide early warnings d: to monitor earthquake |
| A. | a b c |
| B. | a b c d |
| C. | a c d |
| D. | b c d |
| Answer» B. a b c d | |
| 71. |
___________sensors instrumented in a building can detect the direction and magnitude of a quake and provide an assessment of the building safety |
| A. | seismic |
| B. | acoustic |
| C. | acoustic or seismic |
| D. | position |
| Answer» A. seismic | |
| 72. |
The applications of WSN are: |
| A. | monitoring of objects only. |
| B. | monitoring of an area only. |
| C. | monitoring of both area and objects |
| D. | all of above |
| Answer» D. all of above | |
| 73. |
Wireless Sensor Networks are networks that consist of sensors that are
|
| A. | a and b |
| B. | b and c |
| C. | a , b and c |
| D. | a and c |
| Answer» C. a , b and c | |
| 74. |
Communication paradigm used in wireless sensor networks and in ad-hoc network are respectively |
| A. | point to p[oint , point to poiunt |
| B. | broadcast , point to point |
| C. | point to point , broadcast |
| D. | broadcast , broadcast |
| Answer» B. broadcast , point to point | |
| 75. |
wireless sensor networks are |
| A. | data centric |
| B. | address centric |
| C. | both |
| D. | none opf above |
| Answer» A. data centric | |
| 76. |
Wireless sensor nodes are equipped with i. Sensing unit ii. Processing unit, iii. Communication unit iv. Power unit |
| A. | i, ii, iv |
| B. | i, iii, iv |
| C. | i, ii, iii, iv |
| D. | i, ii, iii |
| Answer» C. i, ii, iii, iv | |
| 77. |
A Relay node has |
| A. | process sensor or control equipment |
| B. | control equipment |
| C. | communiucation equipment |
| D. | process sensor |
| Answer» C. communiucation equipment | |
| 78. |
the most owerfull node is |
| A. | sensor node |
| B. | relay node |
| C. | cluster head |
| D. | gateway |
| Answer» D. gateway | |
| 79. |
choose the correct statement |
| A. | there may be more than one cluster in wsn. |
| B. | there must be more than one cluster in wsn. |
| C. | there is only one cluster in wsn. |
| D. | none of above |
| Answer» A. there may be more than one cluster in wsn. | |
| 80. |
In sensor networks, the nodes are of different capabilities in terms of computation, communication, memory, energy level and reliability. it is called as |
| A. | centralized |
| B. | heterogeneous |
| C. | distributed |
| D. | homogeneous |
| Answer» B. heterogeneous | |
| 81. |
In sensor networks, the nodes are of different capabilities in terms of computation, communication, memory, energy level and reliability. it is called as |
| A. | hierarchical |
| B. | centralized |
| C. | distributed |
| D. | homogeneous |
| Answer» A. hierarchical | |
| 82. |
A topology is a communication topology, where each node connects directly to a gateway. A single gateway can send or receive a message to a number of remote nodes. |
| A. | star |
| B. | tree |
| C. | mesh |
| D. | none of above |
| Answer» A. star | |
| 83. |
Tree topology is also called as |
| A. | unique star topology |
| B. | cascaded star topology |
| C. | unique mesh topology |
| D. | cascaded mesh topology |
| Answer» B. cascaded star topology | |
| 84. |
The Mesh topologies |
| A. | unique path between pair of nodes |
| B. | multiple path between pair of nodes |
| C. | can not isolate and detect faults |
| D. | none of above |
| Answer» B. multiple path between pair of nodes | |
| 85. |
The underground wireless sensor networks are ___________ than the terrestrial WSNs |
| A. | more expensive |
| B. | less expensive |
| C. | equal expensive |
| D. | a or b |
| Answer» A. more expensive | |
| 86. |
A Under Water WSNs has challenge of |
| A. | a long propagation delay, |
| B. | a limited battery that cannot be recharged or replaced. |
| C. | a and b both |
| D. | uses traditional communication inside water |
| Answer» C. a and b both | |
| 87. |
Multimedia wireless sensor networks has requirements of |
| A. | low bandwidth |
| B. | high bandwidth |
| C. | high energy consumption and high bandwidth |
| D. | low energy consumption and low bandwidth |
| Answer» C. high energy consumption and high bandwidth | |
| 88. |
The advantages of MWSN over the static wireless sensor networks include |
| A. | better and improved coverage |
| B. | better energy efficiency |
| C. | superior channel capacity |
| D. | all of above |
| Answer» D. all of above | |
| 89. |
For bandwidth allocation, |
| A. | available bandwidth means that the user can have a peak of bandwidth. |
| B. | available bandwidth means that the user can have average of bandwidth. |
| C. | available bandwidth means that the user can have a guaranteed of bandwidth. |
| D. | none of the above |
| Answer» A. available bandwidth means that the user can have a peak of bandwidth. | |
| 90. |
Delay is the time datagrams take from the source to destination and depends on |
| A. | fixed delays - application delay, transmission over physical medium |
| B. | variable delays -queuing delays, contention with other traffic at each network node. |
| C. | transmission dealy |
| D. | both fixed and variable delay |
| Answer» D. both fixed and variable delay | |
| 91. |
Packet loss is, the number of packets lost in the network, via |
| A. | errors in the physical medium |
| B. | packet drop policies due to congestion |
| C. | a and b both |
| D. | non availability of connection |
| Answer» C. a and b both | |
| 92. |
To calculate throughput, the total time was calculated as the difference between |
| A. | the time between the first packet and last packet reached the destination |
| B. | the time the first packet started and the time the last packet reached the destination |
| C. | the time the first packet started and the time the last packet started |
| D. | the time the first packet reached and the time the last packet started |
| Answer» B. the time the first packet started and the time the last packet reached the destination | |
| 93. |
Jitter is commonly used as an indicator of |
| A. | consistency and stability of a network. |
| B. | consistency of a network. |
| C. | stability of a network. |
| D. | throughput of anetwork. |
| Answer» A. consistency and stability of a network. | |
| 94. |
A layered architecture of WSN has a |
| A. | base station in each layer |
| B. | only single hop communication |
| C. | multiple base stations |
| D. | single powerful base station |
| Answer» D. single powerful base station | |
| 95. |
The physical layer is responsible for |
| A. | frequency selection, |
| B. | modulation and data encryption. |
| C. | both |
| D. | modulation only |
| Answer» C. both | |
| 96. |
The data link layer functions as a |
| A. | pathway for multiplexing of data streams, data frame detection, |
| B. | medium access control (mac) and error control. |
| C. | data frame detection, medium access control |
| D. | both a and b |
| Answer» D. both a and b | |
| 97. |
Very limited resources for WSN refers |
| A. | limited memory, and limited computation |
| B. | limited power, and limited computation |
| C. | limited memory, limited power, |
| D. | limited memory, limited computation and limited power |
| Answer» D. limited memory, limited computation and limited power | |
| 98. |
Wireless networks are classified as: |
| A. | infrastructure-based networks |
| B. | ad-hoc network |
| C. | infrastructure-based networks and infrastructure-less (ad-hoc) networks. |
| D. | structured network |
| Answer» C. infrastructure-based networks and infrastructure-less (ad-hoc) networks. | |
| 99. |
Infrastructure-based networks example is |
| A. | wlan |
| B. | manet |
| C. | wlan and manet both |
| D. | none of the above |
| Answer» A. wlan | |
| 100. |
Infrastructure-less or Ad Hoc network, example is |
| A. | wlan |
| B. | manet |
| C. | wlan and manet both |
| D. | none of the above |
| Answer» B. manet | |
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