What restrictions apply to the use of the aggregate functions within the SELECT statement? How do nulls affect the aggregate functions?
What will be an ideal response?
An aggregate function can be used only in the SELECT list and in the HAVING clause.
Apart from COUNT(*), each function eliminates nulls first and operates only on the remaining
non-null values. COUNT(*) counts all the rows of a table, regardless of whether nulls or duplicate
values occur.
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b. The value variable will contain the sum of all the values in the numbers array.
``` int[][] scores = { {88, 80, 79, 92}, {75, 84, 93, 80}, {98, 95, 92, 94}, {91, 84, 88, 96} }; ``` a. 95 b. 84 c. 94 d. 93
As programs enter the system, they are placed on a queue. When space becomes available, the __________ selects a program from the queue and loads it into memory.
a. queuing routine b. scheduler c. dispatcher d. command processor
In the figure below, match each label with the statement that best describes it.
A. Leaves all occurrences of a word unchanged. B. Adjusts a misspelled word to be the selected suggestion. C. Passes by an occurrence of a given word. D. Puts a word in the Word dictionary.
If an array's logical size is greater than zero, the index of the last item in the array is the logical size plus 1.
Answer the following statement true (T) or false (F)