McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Electronics and Telecommunication Engineering [ENTC] .
| 401. |
Range-free localization trying to find _____________ values distances or angles. |
| A. | exact |
| B. | approximate |
| C. | actual |
| D. | none of these |
| Answer» B. approximate | |
| 402. |
Following is the example of Range-Free Localization. |
| A. | hop-based localization |
| B. | point in triangle (pit) |
| C. | both a and b |
| D. | triangulation |
| Answer» C. both a and b | |
| 403. |
Trilateration technique measures the _______to all anchors and Triangulation measures ________to all anchors, |
| A. | angle, distance |
| B. | angle, angle |
| C. | distance, angle |
| D. | distance, distance |
| Answer» C. distance, angle | |
| 404. |
Hop Based Localization uses the ___________ to calculate the approximate distance to the anchor. |
| A. | median hop length |
| B. | mean hop length |
| C. | minimum hop length |
| D. | maximum hop length |
| Answer» B. mean hop length | |
| 405. |
Node A and B 130 meters away and 5 hope separated. Node B and C 170 meters away and 6 hope separated and Node A and c 120 meters away and 5 hope separated. Then the mean hop length is___ meters. |
| A. | 24 |
| B. | 28.3 |
| C. | 26 |
| D. | 26.1 |
| Answer» D. 26.1 | |
| 406. |
Node A and B 130 meters away and 5 hope separated and Node A and c 120 meters away and 5 hope separated. Then the mean hop length is___ meters. |
| A. | 24 |
| B. | 25 |
| C. | 26 |
| D. | 50 |
| Answer» B. 25 | |
| 407. |
While testing whether a node is inside a triangle or outside by moving node under consideration in any direction. If it gets closer or further away from all three triangle corners, then it is ________ the triangle. |
| A. | outside |
| B. | inside |
| C. | may outside or inside |
| D. | cannot predict |
| Answer» A. outside | |
| 408. |
While testing whether a node is inside a triangle or outside by moving node under consideration in any direction. If it does not gets closer or further away from all the three triangle corners, then it is ________ the triangle. |
| A. | outside |
| B. | inside |
| C. | may outside or inside |
| D. | cannot predict |
| Answer» A. outside | |
| 409. |
The node in the network, which produces the required data and is able to send it out to other nodes in the network is called as |
| A. | data source |
| B. | data destination |
| C. | data forwarder |
| D. | data sink |
| Answer» A. data source | |
| 410. |
The node in the network, which requires the data and is able to receive it from other nodes in the network is called as |
| A. | data source |
| B. | data destination |
| C. | data forwarder |
| D. | data sink |
| Answer» B. data destination | |
| 411. |
Any node in the network, which is able to receive it from another node and to send it further is called as |
| A. | data source |
| B. | data destination |
| C. | data forwarder |
| D. | data sink |
| Answer» C. data forwarder | |
| 412. |
A dedicated node(s) in the network, which is the embedded destination of any data in this network is called as |
| A. | data source |
| B. | data destination |
| C. | data forwarder |
| D. | data sink |
| Answer» D. data sink | |
| 413. |
Select the correct statement |
| A. | a valid routing path may consists of infinite number of nodes but it does not contain loops. |
| B. | a valid routing path consists of a finite number of nodes and it may contain loops. |
| C. | a valid routing path consists of a finite number of nodes and it does not contain loops. |
| D. | a valid routing path consists of a finite number of nodes and it contain loops. |
| Answer» C. a valid routing path consists of a finite number of nodes and it does not contain loops. | |
| 414. |
Select the incorrect statement. |
| A. | while a normal data destination cannot change over time, the sink can. |
| B. | a sink can be mobile and change its position. |
| C. | sink may have additional broadband communication interface |
| D. | the individual nodes on the path are called as hops. |
| Answer» A. while a normal data destination cannot change over time, the sink can. | |
| 415. |
Select the incorrect statement. |
| A. | while a normal data destination can change over time, the sink usually does not. |
| B. | a sink cannot be mobile and change its position. |
| C. | sink may have additional broadband communication interface |
| D. | the individual nodes on the path are called as hops. |
| Answer» B. a sink cannot be mobile and change its position. | |
| 416. |
___________ delivers the message to all nodes in the network. Single source and all destinations |
| A. | full network broadcast |
| B. | unicast |
| C. | multicast |
| D. | convergecast |
| Answer» A. full network broadcast | |
| 417. |
_____________ has one source and one destination, which could be any nodes in the network |
| A. | full network broadcast |
| B. | unicast |
| C. | multicast |
| D. | convergecast |
| Answer» B. unicast | |
| 418. |
___________ has several destinations. There is a single source, but multiple destinations of the data. |
| A. | full network broadcast |
| B. | unicast |
| C. | multicast |
| D. | convergecast |
| Answer» C. multicast | |
| 419. |
_____________ is special sensor networks and refers to the collection of data from all nodes to a dedicated sink. |
| A. | full network broadcast |
| B. | unicast |
| C. | multicast |
| D. | convergecast |
| Answer» D. convergecast | |
| 420. |
Select incorrect statement |
| A. | hop corresponds to some distance in the network, thus more hops correspond to longer distance. |
| B. | geographic proximity guarantee the availability or the shortness of a route to the destination. |
| C. | number of hops from the destination is not available at all nodes. needs to be discovered |
| D. | two protocols can use the same metric, but perform the routing differently and with different efficiency. |
| Answer» B. geographic proximity guarantee the availability or the shortness of a route to the destination. | |
| 421. |
Select incorrect statement |
| A. | hop corresponds to some distance in the network, thus more hops correspond to longer distance. |
| B. | geographic proximity does not guarantee the availability or the shortness of a route to the destination. |
| C. | number of hops from the destination is always available at all nodes. |
| D. | two protocols can use the same metric, but perform the routing differently and with different efficiency |
| Answer» C. number of hops from the destination is always available at all nodes. | |
| 422. |
Select incorrect statement |
| A. | hop corresponds to some distance in the network, thus more hops correspond to longer distance. |
| B. | geographic proximity does not guarantee the availability or the shortness of a route to the destination. |
| C. | number of hops from the destination is not available at all nodes. needs to be discovered |
| D. | two protocols can use the same metric, perform the routing differently but has same efficiency. |
| Answer» D. two protocols can use the same metric, perform the routing differently but has same efficiency. | |
| 423. |
Which of the following measurement is based two signals with different velocities |
| A. | time of arrival (toa) |
| B. | one-way time of arrival |
| C. | two-way time of arrival |
| D. | time difference of arrival (tdoa) |
| Answer» D. time difference of arrival (tdoa) | |
| 424. |
Which of the following is not a prohibitive factors for GPS in wireless sensor networks |
| A. | power consumption |
| B. | accuracy maximum up to 15 meters |
| C. | cost and size |
| D. | need for line of sight (los) |
| Answer» B. accuracy maximum up to 15 meters | |
| 425. |
In WSN messages travel multiple hops, so if it has a________ reliability on each link, then the probability of a message transiting the entire network would be _________. |
| A. | high, high |
| B. | high, low |
| C. | low, low |
| D. | low, high |
| Answer» B. high, low | |
| 426. |
From 20 localization measurements, 19 were inside a radius of 15 meters around the true position, while 1 was outside. This results in an accuracy of 15 meters with a precision of __________. |
| A. | 0.05 |
| B. | 0.05263157894736842 |
| C. | 95%. |
| D. | 0.05 |
| Answer» C. 95%. | |
| 427. |
A _____________ is a tuple, containing all anchors which can be seen at this place and their signal strengths (RSSI or LQI). |
| A. | footprint |
| B. | path print |
| C. | fingerprint |
| D. | handprint |
| Answer» C. fingerprint | |
| 428. |
Location mules are another interesting approach to proximity schemes, where |
| A. | there are installed anchors with an on-board gps |
| B. | a mobile node with an on-board gps |
| C. | a mobile node without an on-board gps |
| D. | there are installed anchors without an on-board gps |
| Answer» B. a mobile node with an on-board gps | |
| 429. |
From 20 localization measurements, 18 were inside a radius of 15 meters around the true position, while 2 was outside. This results in an accuracy of 15 meters with a precision of __________. |
| A. | 0.2 |
| B. | 0.8 |
| C. | 95%. |
| D. | 0.9 |
| Answer» D. 0.9 | |
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