You are creating a contacts list to save the name of your contacts and their phone numbers. You want to retrieve a list of phone numbers by searching on the name. Which structure would you use?
You are saving the SSN numbers of people working in a company. You do not want any duplicate entries. Which structure would you use?
An ArrayList automatically increases its size when more elements are added to it. True or False
Can you sort the names of people stored in an ArrayList in ascending or descending order? If so what is the name of the method? Look into the ArrayList documentation to answer this question.