Three must-know “Lists” questions for your next Python technical screening

Three must-know “Lists” questions for your next Python technical screening

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.

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_](https://medium.com/u/2402c1b14e1e?source=post_page-----ad6c544a369f--------------------------------) 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.

[email protected]

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.

[email protected] _is the same as [email protected] by default. (_This rule is only for the local names)

Now, for the ‘+’ sign, everything after the + is ignored by default.

[email protected] is the same as [email protected]..(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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