RFID+ Exam Cram > Site Analysis > Answers to Exam Prep Questions - Pg. : Safari Books Online

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Answers to Exam Prep Questions

1.	Answer D is correct. All of these devices are recommended for proper site analysis. The RF spectrum analyzer identifies the sources of interference and levels of ambient noise in the area where the RFID system will be implemented. The network analyzer helps determine the quality of the network in the area and identifies any potential problem areas. A camera helps to document all the devices, locations, and processes to provide a complete view of the site.
2.	Answer C is correct. Answer A is incorrect because the network outlet is usually pictured as a full triangle with a line on top that is parallel with its base. The symbol for light or any other switch is usually pictured as S with a vertical line through; therefore, answer B is incorrect. The 240 V electrical outlet symbol is similar to the one with 110 V; however, it has three parallel lines; therefore, answer D is incorrect.
3.	Answer D is correct. By not having a dedicated connection when one electrical circuit is turned off, the entire infrastructure would stop reporting; therefore, answer A is incorrect. As far as it is known, the law does not specify usage of dedicated circuits for RFID systems; therefore, answer C is incorrect. The person installing the RFID infrastructure should follow the design plans and instructions of the RFID architect and, if not specified, always use a dedicated circuit; therefore, answer B is incorrect.
4.	Answer A is correct. When you are searching for interference, you should move the spectrum analyzer toward the RF signal as it becomes stronger; therefore, answer B is incorrect. Using a contractor to perform the spectrum analysis is not a rule but rather an option to avoid the purchase of a spectrum analyzer; therefore, answer C is incorrect. Answer D is not correct, especially when you are trying to determine the source of interference.
5.	Answer A is correct. When you are tracking an item, this term is meant to refer to the individual item, and not larger volume packages. Answers B, C, and D are incorrect for item-level tracking even if an item is a pallet or a trailer.
6.	Answer C is correct. Each case has a tag associated with it; the tag can house data on the contents of the case and the count of items in the case. In case-level tracking, the items within the case may or may not be tagged, depending on the required visibility and application; therefore, answer B is incorrect. Answers A and D are also incorrect.
7.	Answer B is correct. Answer A is not correct in this context because the question refers to shipments of bulk products, not process flow. Answer C is not correct because the question does not refer to the pallet production but instead the products that are shipped on the pallet. The pallet can be tagged by itself for location purposes; however, the term pallet-level tracking refers to tracking the products on this pallet. Therefore, answer D is incorrect.
8.	Answer D is correct. Trailer-level tracking does not refer to trailer manufacturing. Therefore, answers A and B are incorrect. Trailer-level tracking may assist with invoicing; however, it is not a list of items on the invoice received by a retailer. Therefore, answer C is incorrect.
9.	Answer A is correct. A network analyzer can be both hardware and software or a combination of both. It is used for routine inspection or problem identification and provides a human-readable report. Hardware network analyzers can also detect voltage and cable problems, whereas software-only analyzers cannot. This implies that answer B is not correct. Answer C is not correct because the analyzer is looking for problem areas moving the data that the interrogator is gathering and sending to the data management system. Answer D is not correct due to the fact that the network analyzer is a great tool to aid in finding problem areas in the existing network that could hinder a successful implementation of the RFID solution.
10.	Answers B and C are correct. The interrogation zone is an area where the tags are read and/or written to and includes mainly the antennas because the interrogator may be placed further from this zone; therefore, answer A is incorrect. The background noise causes interference, and that should be resolved before the interrogation zone is set up. Therefore, answer D is incorrect.

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