Question

Which of the following is not a valid variable name
a house_num
b house-num
c housenum
d All are invalid​

Answer 1

Answer:

b house-num

Explanation:

A variable name (an identifier) must be assigned to every question, calculated variable, and roster in Survey Solutions. Additionally it must also be assigned to the whole questionnaire, and may be assigned to sections and subsections.

Variable names are used for:

referring to questions in the C# syntax expressions;

naming the data columns in the export data files;

referring to the origin of event in paradata events, errors and comments files.

A variable name is a word that consists only of the following:

English letters A..Z and a..z;

Digits 0..9;

an underscore character “_”.

No other characters are permitted in the variable name. Specifically, spaces are not permitted in the variable names, as variable name must be a single word. Variable name may not start with a digit or underscore, and may not end with an underscore. Double underscores are not permitted in variable name.