1. sensor network is subject to a unique set of resource constraints such as
Correct : 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
Correct : 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
Correct : C. completetly coeerct
4. The challenges we face in designing sensor network systems and applications include
Correct : 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
Correct : B. decentralized
6. A+B16:G26 sensor network is designed to perform a set of high level information processing tasks such as
Correct : D. all of above
7. The size of wireless sensor system is limited mostly by
Correct : D. a and b
8. Following are application areas of wireless sensor network
Correct : D. all of above
9. Following are application areas of wireless sensor networks
Correct : D. all of above
10. Sensors can be used
Correct : 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
Correct : B. pieces
12. They can even use other services such as location tracking using the __.
Correct : A. gps
13. Wireless networks are computer networks that use radio frequency channels as their __ for communication.
Correct : A. physical medium
14. Which of the following is a collection of many separate networks?
Correct : C. wan
15. The portion of the electromagnetic spectrum occupied by a signal is called ________
Correct : A. signal spectrum
16. What is the term used to describe the ability for networking devices from different manufacturers to communicate effectively?
Correct : 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?
Correct : A. scalability
18. What WLAN device provides communications management services to wireless workstations?
Correct : A. access point
19. A wireless extension to a wired network can eliminate the need for new __________ to be installed.
Correct : 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?
Correct : D. rf interferences
21. A wireless network provides immediate connection anywhere in the wireless range of its __________.
Correct : 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.
Correct : A. scalability
23. Standards-based systems provide the assurance that all equipment manufactured to the same standard will be __________.
Correct : C. interoperable
24. In a software world, __________ refers to the capability of a software program to run on different operating systems or hardware models.
Correct : B. portability
25. GPS is an acronym for Global __________ System.
Correct : D. positioning
26. Which one of the following frequency bands is used for cordless phones?
Correct : 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?
Correct : 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?
Correct : D. pan
29. Ad-hoc mode of wireless network is also known as __________ mode.
Correct : B. roaming
30. This mode of wireless network allows devices to communicate directly with each other.
Correct : C. ad-hoc
31. Each node is equipped with
Correct : B. one or more sensing devices
32. ___________routes user queries or commands to appropriate nodes in a sensor network
Correct : C. gateway only
33. Communicating 1 bit over the wireless medium at short ranges consumes ___________energy than processing that bit.
Correct : B. more
34. A sensor network is designed to collect information from a___________ environment
Correct : B. physical
35. It is more appropriate to address nodes in a sensor network by_____ than by______
Correct : D. physical properties/ ip address
36. The challenges we face in designing sensor network systems and applications include
Correct : D. a, b, and c all included
37. The greatest advantage of networked sensing are in improved___________
Correct : C. both
38. A___________ sensing system is inherently more robust against individual sensor node or link failures, because of redundancy in the network
Correct : B. decentralized
39. Because of the unique attenuation characteristics of RF signals, _____network provides a significant energy saving over ______network for the same distance
Correct : B. multi hop / single hop
40. Using more nodes increases
Correct : D. a and b both
41. Each sensor has a finite sensing range, determined by the___________ floor of the sensor
Correct : 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
Correct : A. decreases
43. A sensor network is designed to perform a set of high level information processing tasks such as
Correct : A. detection
44. application of WSN for Infrastructure protection is
Correct : B. power grids, water distribution
45. environmental monitoring is carried out using WSN for
Correct : C. traffic, habitat, security
46. Following are essential characteristics of current sensor network
Correct : D. a and b both
47. select the correct statement
Correct : D. all are correct
48. select the correct statement
Correct : C. a and b both
49. select the correct statement
Correct : D. a and b both
50. Network for sensor networks is ____centric but not ______centric
Correct : B. data , node
51. >___________allows the same time or frequency division multiplexing to be reused across non overlapping clusters
Correct : B. clustering
52. The more capable nodes can naturally play the role of __________
Correct : C. cluster head
53. __________are nodes that aid in passing traffic from one cluster to another
Correct : A. gateway
54. In wireless sensor network
Correct : D. all of above
55. In wireless sensor network
Correct : B. no special master clocks are available
56. Time difference caused by the lack of a common time origin are referred to as___________
Correct : D. a and b both
57. Drawbacks of GPS to use in WSN node is
Correct : 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
Correct : B. i. camera ii. acoustic
59. select the correct statement
Correct : 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
Correct : B. distributed
61. From a data storage point of view ,one may think of a sensor network as a distributed database that
Correct : D. all of above
62. In__________ database systems, data storage may be allocated among several geographical separated locations, connected by a communications network
Correct : B. distributed
63. Each sensor in a sensor network takes___________ measurements of physical phenomena such as heat, sound, light ,pressure or motion
Correct : A. time stamped
64. The challenge in sensor network databases is/ are
Correct : D. all of the above
65. The challenges in sensor network databases
A: limited storage on nodes and high communication costs imply that older data has to be discarded
B: sensor tasking interacts in numerous ways with the sensor database system
Correct : 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
Correct : 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
Correct : 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
Correct : 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
Correct : 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
Correct : 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
Correct : A. seismic
72. The applications of WSN are:
Correct : D. all of above
73. Wireless Sensor Networks are networks that consist of sensors that are
A: distributed in an ad hoc manner.
B: These sensors work with each other to sense some physical phenomenon and then the information gathered is processed to get relevant results.
C: Wireless sensor networks consist of protocols and algorithms with self-organizing capabilities.
Correct : C. a , b and c
74. Communication paradigm used in wireless sensor networks and in ad-hoc network are respectively
Correct : B. broadcast , point to point
75. wireless sensor networks are
Correct : A. data centric
76. Wireless sensor nodes are equipped with i. Sensing unit ii. Processing unit, iii. Communication unit iv. Power unit
Correct : C. i, ii, iii, iv
77. A Relay node has
Correct : C. communiucation equipment
78. the most owerfull node is
Correct : D. gateway
79. choose the correct statement
Correct : 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
Correct : 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
Correct : 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.
Correct : A. star
83. Tree topology is also called as
Correct : B. cascaded star topology
84. The Mesh topologies
Correct : B. multiple path between pair of nodes
85. The underground wireless sensor networks are ___________ than the terrestrial WSNs
Correct : A. more expensive
86. A Under Water WSNs has challenge of
Correct : C. a and b both
87. Multimedia wireless sensor networks has requirements of
Correct : C. high energy consumption and high bandwidth
88. The advantages of MWSN over the static wireless sensor networks include
Correct : D. all of above
89. For bandwidth allocation,
Correct : 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
Correct : D. both fixed and variable delay
91. Packet loss is, the number of packets lost in the network, via
Correct : C. a and b both
92. To calculate throughput, the total time was calculated as the difference between
Correct : 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
Correct : A. consistency and stability of a network.
94. A layered architecture of WSN has a
Correct : D. single powerful base station
95. The physical layer is responsible for
Correct : C. both
96. The data link layer functions as a
Correct : D. both a and b
97. Very limited resources for WSN refers
Correct : D. limited memory, limited computation and limited power
98. Wireless networks are classified as:
Correct : C. infrastructure-based networks and infrastructure-less (ad-hoc) networks.
99. Infrastructure-based networks example is
Correct : A. wlan
100. Infrastructure-less or Ad Hoc network, example is