A monitor should be placed directly in front of the user about an arm's length away, and the top of the screen should be no more than 12 inches above the user's eyes once the user's chair is adjusted.
Answer the following statement true (T) or false (F)
False
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Display the message "Product is", followed by the value of the variable result—use string interpolation.
What will be an ideal response?
Suppose we do not require that all attributes in the primary key are non-null and instead request that, in every tuple, at least one key (primary or candidate) does not have nulls in it. (Tuples can have nulls in other places and the non-null key can be di?erent for di?erent tuples.) Give an example of a relational instance that has two distinct tuples that might become one once the values for all nulls become known (that is, are replaced with real values). Explain why this is not possible when one key (such as the primary key) is designated to be non-null for all tuples in the relation.
What will be an ideal response?
In some programming languages, when a user presses Enter without typing anything, the input variable's value is set to a constant called NULL.
Answer the following statement true (T) or false (F)
Why does the Application Guide promote code reusability?
A. Ensures the code shares characteristics and design across all modules making it easier to plug into B. Developers will make modules with efficient C. Developers are less likely to make errors D. Developers will test for every possible scenario