A decision ____________ system helps people make decisions by directly manipulating data, accessing data from external sources, generating statistical projections, and creating data models of various scenarios.

Answer the following questions true (T) or false (F)

1. When a program begins to execute, the contents of the memory cells it uses are initially empty. 2. If the computer is switched off, data in secondary storage is usually not lost. 3. Loading the operating system from disk into memory is called booting the computer.

Which of the following correctly represents the expression a = a + 3?

a) 3a b) a += 3 c) a + 3 d) None of the above.