I applied for the software developer position on their jobs website. After more than a week, I received an email describing the interview process:

• Phone interview with the Recruiter
• Technical phone interview with two members from the IT Department
• In-person interview rounds at their Global Headquarters in Amsterdam

The position was for a Perl developer, but they did not require Perl experience.

I passed the first interview but failed the technical one. Since they had reviewed my resume, I expected questions within my field of knowledge.

Additionally, I believe the description of requirements could have been clearer.

Given a text file containing the text for Hamlet (/usr/share/file.txt), return the top 5 most frequent words with their counts.

How is the array from the previous question stored in memory, and what is an optimal way to access the value of a specific key?

You have a long set of numbers, more than 400k. How would you search if a specific number is in the set? They expect a better solution than looping through the set until you find the number.