Given the Following Method That Checks for a Valid 5-Digit

question 66

Multiple Choice

Given the following method that checks for a valid 5-digit number, what do we need to fix?
Public static boolean isValid(String s)
{
If (s != null && s.length() == 5)
{
Int i = 0;
Boolean b = Character.isDigit(s.charAt(i) ) &&
Character.isDigit &&
Character.isDigit) &&
Character.isDigit) &&
Character.isLetter) ;
}
Else
{
Return false;
}
}

• A) Change the parameter variable type to integer
• B) Add another local Boolean variable definition
• C) Add a return statement inside the "if" branch
• D) Add a new Boolean parameter variable

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Definitions:

Trial And Error

A problem-solving method involving trying various solutions until finding one that works, often learning from mistakes.

Algorithm

A set of rules or procedures followed in problem-solving or calculations.

Heuristic Device

A method or approach used to quickly find a satisfactory solution for a problem, without guaranteeing an optimal or perfect solution.

Social Science Literature

Written works that analyze, interpret, or critique the structure and behavior of societies and human relationships.