McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Electronics and Telecommunication Engineering [ENTC] .
| 1. |
sensor network is subject to a unique set of resource constraints such as |
| A. | finite on-board battery power |
| B. | limited network communication bandwidth |
| C. | a and b both |
| D. | non of the above |
| Answer» C. a and b both | |
| 2. |
In a typical sensor network, each sensor node operates unethered and has a microprocessor and a small amount of memory for signal processing and task scheduling |
| A. | true |
| B. | false |
| C. | partially correct as memory is large |
| D. | partially correct as sensor node does not have microprocessor |
| Answer» A. true | |
| 3. |
Information collected by and transmitted on a sensor network describes conditions of physical environments and requires advanced query interfaces and search engines to effectively support user-level functions |
| A. | partially correct as node support users level functions |
| B. | partially correct as node does not have sensors |
| C. | completetly coeerct |
| D. | incorreect |
| Answer» C. completetly coeerct | |
| 4. |
The challenges we face in designing sensor network systems and applications include |
| A. | limited hardware |
| B. | limited support for networking |
| C. | limited support for software development |
| D. | all of the above |
| Answer» D. all of the above | |
| 5. |
A___________ sensing system is inherently more robust against individual sensor node or link failures, because of redundancy in the network |
| A. | centralized |
| B. | decentralized |
| C. | ad-hoc |
| D. | multi hope |
| Answer» B. decentralized | |
| 6. |
A+B16:G26 sensor network is designed to perform a set of high level information processing tasks such as |
| A. | detection |
| B. | tracking |
| C. | classification |
| D. | all of above |
| Answer» D. all of above | |
| 7. |
The size of wireless sensor system is limited mostly by |
| A. | the cost of maintaining communication links |
| B. | the cost of sensor hardware |
| C. | environmental monitoring |
| D. | a and b |
| Answer» D. a and b | |
| 8. |
Following are application areas of wireless sensor network |
| A. | asset and warehouse management |
| B. | automotive |
| C. | building monitoring and control |
| D. | all of above |
| Answer» D. all of above | |
| 9. |
Following are application areas of wireless sensor networks |
| A. | health care |
| B. | industrial process control |
| C. | military battlefield awareness |
| D. | all of above |
| Answer» D. all of above | |
| 10. |
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 man-made disasters |
| C. | to monitor biological or chemical hazards to provide early warnings |
| D. | all of above |
| Answer» D. all of above | |
| 11. |
___________framework allows an application developer to write code for a sensor network signal processing and tracking application using a state-centric model of programming |
| A. | tossim |
| B. | pieces |
| C. | contiki |
| D. | mantis |
| Answer» B. pieces | |
| 12. |
They can even use other services such as location tracking using the __. |
| A. | gps |
| B. | vps |
| C. | gprs |
| D. | gsm |
| Answer» A. gps | |
| 13. |
Wireless networks are computer networks that use radio frequency channels as their __ for communication. |
| A. | physical medium |
| B. | medium access control |
| C. | tdma |
| D. | cdma |
| Answer» A. physical medium | |
| 14. |
Which of the following is a collection of many separate networks? |
| A. | lan |
| B. | man |
| C. | wan |
| D. | pan |
| Answer» C. wan | |
| 15. |
The portion of the electromagnetic spectrum occupied by a signal is called ________ |
| A. | signal spectrum |
| B. | bandwidth |
| C. | frequency width |
| D. | signal strength |
| Answer» A. signal spectrum | |
| 16. |
What is the term used to describe the ability for networking devices from different manufacturers to communicate effectively? |
| A. | accessible |
| B. | interoperable |
| C. | portable |
| D. | scalable |
| Answer» B. interoperable | |
| 17. |
What is the term used to describe the ability of a network technology to be easily resized to meet the growing or changing requirements of an organization? |
| A. | scalability |
| B. | portability |
| C. | interoperability |
| D. | accessibility |
| Answer» A. scalability | |
| 18. |
What WLAN device provides communications management services to wireless workstations? |
| A. | access point |
| B. | antenna |
| C. | network adaptor |
| D. | repeater |
| Answer» A. access point | |
| 19. |
A wireless extension to a wired network can eliminate the need for new __________ to be installed. |
| A. | cables |
| B. | access point |
| C. | router |
| D. | bridges |
| Answer» A. cables | |
| 20. |
Which one of the following is not a consideration when deciding between a WLAN and a wired LAN beyond the network medium? |
| A. | scalability |
| B. | ease of installation |
| C. | flexibility |
| D. | rf interferences |
| Answer» D. rf interferences | |
| 21. |
A wireless network provides immediate connection anywhere in the wireless range of its __________. |
| A. | bridges |
| B. | access points |
| C. | gateways |
| D. | routers |
| Answer» B. access points | |
| 22. |
The __________ of a network refers to the network's capability to change as needed to meet the expanding needs of an organization or home. |
| A. | scalability |
| B. | interoperability |
| C. | portability |
| D. | flexibility |
| Answer» A. scalability | |
| 23. |
Standards-based systems provide the assurance that all equipment manufactured to the same standard will be __________. |
| A. | portable |
| B. | scalable |
| C. | interoperable |
| D. | flexible |
| Answer» C. interoperable | |
| 24. |
In a software world, __________ refers to the capability of a software program to run on different operating systems or hardware models. |
| A. | scalability |
| B. | portability |
| C. | flexibility |
| D. | interoperability |
| Answer» B. portability | |
| 25. |
GPS is an acronym for Global __________ System. |
| A. | portability |
| B. | policing |
| C. | political |
| D. | positioning |
| Answer» D. positioning | |
| 26. |
Which one of the following frequency bands is used for cordless phones? |
| A. | 40 mhz |
| B. | 900 mhz |
| C. | 75 mhz |
| D. | 300 mhz |
| Answer» B. 900 mhz | |
| 27. |
What wireless mode is being used by a student who uses a wireless connection to link to her lab partner's notebook PC in a study hall? |
| A. | ad-hoc |
| B. | infrastructure |
| C. | fixed-base |
| D. | roaming |
| Answer» A. ad-hoc | |
| 28. |
What is the acronym used to indicate a network that provides support for a single user in a 10-meter range? |
| A. | man |
| B. | can |
| C. | lan |
| D. | pan |
| Answer» D. pan | |
| 29. |
Ad-hoc mode of wireless network is also known as __________ mode. |
| A. | router |
| B. | roaming |
| C. | infrastructure |
| D. | digital |
| Answer» B. roaming | |
| 30. |
This mode of wireless network allows devices to communicate directly with each other. |
| A. | digital |
| B. | physical |
| C. | ad-hoc |
| D. | infrastructure |
| Answer» C. ad-hoc | |
| 31. |
Each node is equipped with |
| A. | only one sensing device |
| B. | one or more sensing devices |
| C. | only more than one sensing devices |
| D. | no sensing device attached |
| Answer» B. one or more sensing devices | |
| 32. |
___________routes user queries or commands to appropriate nodes in a sensor network |
| A. | bridge and gateway both |
| B. | bridge only |
| C. | gateway only |
| D. | none of above |
| Answer» C. gateway only | |
| 33. |
Communicating 1 bit over the wireless medium at short ranges consumes ___________energy than processing that bit. |
| A. | less |
| B. | more |
| C. | equal |
| D. | can not compare |
| Answer» B. more | |
| 34. |
A sensor network is designed to collect information from a___________ environment |
| A. | logical |
| B. | physical |
| C. | logical as well as physical |
| D. | none of above |
| Answer» B. physical | |
| 35. |
It is more appropriate to address nodes in a sensor network by_____ than by______ |
| A. | ip address/physical properties |
| B. | netwok address / ip address |
| C. | ip address / netwok address |
| D. | physical properties/ ip address |
| Answer» D. physical properties/ ip address | |
| 36. |
The challenges we face in designing sensor network systems and applications include |
| A. | limited hardware |
| B. | limited support for networking |
| C. | limited support for software development |
| D. | a, b, and c all included |
| Answer» D. a, b, and c all included | |
| 37. |
The greatest advantage of networked sensing are in improved___________ |
| A. | robustness |
| B. | scalability |
| C. | both |
| D. | not applicable |
| Answer» C. both | |
| 38. |
A___________ sensing system is inherently more robust against individual sensor node or link failures, because of redundancy in the network |
| A. | centralized |
| B. | decentralized |
| C. | both |
| D. | not applicable |
| Answer» B. decentralized | |
| 39. |
Because of the unique attenuation characteristics of RF signals, _____network provides a significant energy saving over ______network for the same distance |
| A. | single hop/multi hop |
| B. | multi hop / single hop |
| C. | wireless/ wired |
| D. | single hop/ wired |
| Answer» B. multi hop / single hop | |
| 40. |
Using more nodes increases |
| A. | the cost |
| B. | the power consumption of components |
| C. | neither a nor b |
| D. | a and b both |
| Answer» D. a and b both | |
| 41. |
Each sensor has a finite sensing range, determined by the___________ floor of the sensor |
| A. | ground |
| B. | noise |
| C. | ground and noise |
| D. | none of above |
| Answer» B. noise | |
| 42. |
Once a signal source is inside the sensing range of a sensor, further increasing the sensor density ___________the average distance from a sensor to the signal source, hence improving the SNR |
| A. | decreases |
| B. | increases |
| C. | maintain |
| D. | does not affect |
| Answer» A. decreases | |
| 43. |
A sensor network is designed to perform a set of high level information processing tasks such as |
| A. | detection |
| B. | tracking |
| C. | classification |
| D. | all above |
| Answer» A. detection | |
| 44. |
application of WSN for Infrastructure protection is |
| A. | traffic, habitat, |
| B. | power grids, water distribution |
| C. | habitat, security |
| D. | responsive environment |
| Answer» B. power grids, water distribution | |
| 45. |
environmental monitoring is carried out using WSN for |
| A. | multi-target tracking |
| B. | power grids, water distribution |
| C. | traffic, habitat, security |
| D. | appliances, factory, supply chains |
| Answer» C. traffic, habitat, security | |
| 46. |
Following are essential characteristics of current sensor network |
| A. | the nodes have only modest processing power and memory |
| B. | network links and nodes can come and go |
| C. | neither a nor b |
| D. | a and b both |
| Answer» D. a and b both | |
| 47. |
select the correct statement |
| A. | what is important to the sensor network is the information the nodes contain, not the nodes themselves |
| B. | in wireless sensor networks, nodes can be destroyed, be asleep or die from malfunction or battery depletion |
| C. | preservation of energy is of paramount concern in wireless sensor network |
| D. | all are correct |
| Answer» D. all are correct | |
| 48. |
select the correct statement |
| A. | what is important to the sensor network is the information the nodes contain, not the nodes themselves |
| B. | preservation of energy is of paramount concern in wireless sensor network |
| C. | a and b both |
| D. | neither a nor b |
| Answer» C. a and b both | |
| 49. |
select the correct statement |
| A. | in wireless sensor networks, nodes can be destroyed, be asleep or die from malfunction or battery depletion |
| B. | what is important to the sensor network is the information the nodes contain, not the nodes themselves |
| C. | neither a nor b |
| D. | a and b both |
| Answer» D. a and b both | |
| 50. |
Network for sensor networks is ____centric but not ______centric |
| A. | node , data |
| B. | data , node |
| C. | node , information |
| D. | link , data |
| Answer» B. data , node | |
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