In this post, we discuss three most commonly asked question types from “lists” in a python technical screening. These questions and their variants are common in a technical screening testing your knowledge on array handling and logical thinking. All these questions are from the “Easy” category and usually asked in pairs in a 45 mins phone interview.
Thanks, Divyam Solanki for providing elegant solutions to the problems.
Unique Email Filtering:
We all know that any email consists of two components,i.e Local name, and _Domain name. _Both components are separated by @ sign.
alice → Local name;
gmail.com →Domain name;
Now, besides the @ sign they can also contain ‘ . ’ or ‘+’ sign. We know that the ‘ . ’ sign does not mean anything in the local name. It has significance only in the Domain name.
_alice.z@gmail.com _is the same as alicez@gmail.com by default. (This rule is only for the local names)
Now, for the ‘+’ sign, everything after the + is ignored by default.
m.y+name@gmail.com is the same as my@gmail.com…(Again this rule is only for the local domain names)
Now that we have sufficient knowledge to segregate the effective email addresses, we shall discuss the question upfront.
Given a list of emails, we send one email to each address in the list. How many different addresses actually receive mails?
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