Question at position 1 Which of the following is a valid variable name?firstVarfirst-varfirst var1stVarAll of the above are valid

Question

Question at position 1 Which of the following is a valid variable name?firstVarfirst-varfirst var1stVarAll of the above are valid

BlackTom AI · Accepted Answer

Question at position 1 asks which of the following is a valid variable name. 
Option 1: firstVar. This follows common programming language rules: starts with a letter, contains only letters and digits, and has no spaces or special characters. It is therefore a valid variable name. 
Option 2: first-var. The hyphen is typically treated as a minus operator or invalid in variable naming, so this is not allowed. 
Option 3: first var. The space breaks the identifier, so it cannot be a single variable name in standard syntax. 
Option 4: 1stVar. It starts with a digit, which is not permitted for variable names in most languages, making it invalid. 
Option 5: All of the above are valid. Since options 2, 3, and 4 are invalid, this statement is false. 
In summary, only Option 1 (firstVar) satisfies the typical rules for valid identifiers, while the others violate common naming conventions.

Question at position 1 Which of the following is a valid variable name?firstVarfirst-varfirst var1stVarAll of the above are valid

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