Error Received:
"Challenge Not yet complete... here's what's wrong: 
The process did not set the correct Type value on submitting for approval"

Here is my code: 
public class StringArrayTest {
    public static List<String> generateStringArray(Integer len){
        List<String> myarr = new List<String>();
        for(integer n=0;n<=len;n++)
        {
            myarr.add('Test' +n);
            system.debug(myarr[n]);
        }
        return (myarr);
    }
}

Error Received:
"Challenge Not yet complete... here's what's wrong: 
The process did not set the correct Type value on submitting for approval"

Hi All
can you please share interview questions and different senarios which ask for experienced sfdc developers