Question

A string expression can consist of

a. a combination of character columns and literal values
b. one or more literal values
c. one or more character columns
d. all of the above

Answer 1

A string expression can consist of a combination of character columns and literal values, one or more literal values, or one or more character columns. Thus, the correct answer is 'all of the above'.

Step-by-step explanation:

A string expression can consist of a variety of elements. Specifically, these elements can include:

• A combination of character columns and literal values
• One or more literal values
• One or more character columns

Therefore, the correct answer is d. all of the above. To clarify, a string expression can be a simple combination of characters, a more complex assembly of variables and constants, or even a concatenation of multiple strings and variables. This concept is important in programming and computing, as string manipulation is a common task in many programming languages.