A keyword is a word that has special meaning in the programming language you are using.
Answer the following statement true (T) or false (F)
True
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Describe an intuitively ecient query evaluation plan for the following query, where the relations involved have the following schemas: Rel1(A,B), Rel2(B,C).
SELECT T.A FROM Rel1 T WHERE EXISTS ( ( SELECT R.B FROM Rel1 R WHERE R.A = T.A) EXCEPT ( SELECT O.B FROM Rel2 O WHERE O.C = 123) )
You ____ a worksheet to emphasize certain entries and make the worksheet easier to read and understand.
A. save B. print C. format D. clear
A stack is a data structure in which all insertions and deletions are restricted to one end, called the bottom.
Answer the following statement true (T) or false (F)
Every computer can be divided into 6 basic units. They are:
a) monitor, mouse, keyboard, hard drive, processor and disk drives. b) input, output, primary storage, secondary storage, memory and ALU. c) input, output, memory, ALU, CPU and secondary storage. d) input, output, primary storage, secondary storage, CPU, memory.