Answer the following statement(s) true (T) or false (F)
1. Function block programming is one of the languages that IEC 61131-3 specifies.
2. An IREF can be a tag or a number.
3. Tags must be used in OREFs.
4. Each OREF must also have at least one corresponding IREF.
5. Function block diagram (FBD) programming is one of the IEC 61131-3 languages
1. True
2. True
3. True
4. False
5. True
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When cabling a rack, which of the following is BEST practice?
A. Use rack specific cabling hardware B. Let cables hang loosely behind the servers C. Channel all power cables down the sides, and all network cables down the center D. Keep cables close to the front of the rack for better access
Answer the following statements true (T) or false (F)
1. If we want to find the median of 100 scores, we need 100 separate variables to hold the data.. 2. An array behaves like a list of variables each of which is of the same type and for which there is a uniform, convenient naming convention that can be declared in a single line of code. In the explanation, give an example of declaration and access. 3. With arrays, indices start at any number the programmer chooses to indicate in the definition. 4. The programmer should always use a defined constant in an array declaration.