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review the tests implemented in the test classes of taxi-company-stageone should it be possible to use these as
review the way in which vehicle passenger associations are stored in the assignments map in taxi company can you see
the next planned stage of the implementation is to provide multiple taxis to carry multiple passengers concurrently
do you feel that the taxi company object should keep separate lists of those vehicles that are free and those that are
if you have not already done so take a thorough look through the implementation in the taxi-company-stage-one project
critically assess the list of steps we have outlined with the following questions in mind do you feel the order is
the taxi-company-outline-testing project includes some simple initial junit tests try them out add any further tests
1 what is a programmable logic controller plc2 identify four tasks in addition to relay switching operations that plcs
1 explain the differences between open and proprietary plc architecture2 state two ways in which io is incorporated
1 explain the function of the backplane of a plc rack2 what is the function of the optical isolator circuit used in
1 with reference to plc discrete input modulesa what types of field input devices are suitable for use with themb list
1 how does the processor identify the location of a specific input or output device2 list the three basic elements of
1 what is the function of a plc input interface module2 what is the function of a plc output interface module3 with
1 list five factors affecting the memory size needed for a particular plc installation2 what does the instruction set
for the logic gate circuit shown in figure 4-29a determine the boolean equationb draw an equivalent ladder logic
1 what is the most important characteristic of the gray code2 what makes the binary system so applicable to computer
answer the following with regard to a ladder logic runga describe the basic makeup of a ladder logic rungb how are the
1 what does the address assigned to an instruction indicate2 when are input branch instructions used as part of a
answer the following with regard to the examine if open instructiona what is another common name for this instructionb
answer the following with regard to the examine if closed instructiona what is another common name for this
1 list the five standard plc languages as defined by the international standard for programmable controllers and give a
1 outline the sequence of events involved in a plc scan cycle2 list four factors that enter into the length of the scan
a what information is stored in the input image table fileb in what form is this information stored2 a what information
1 what does the memory map for a typical plc processor consist of2 compare the function of the plc program and data
1 compare the type of sensor signal obtained from a thermocouple with that from an rtd2 explain how a magnetic reed