Messages and Phone Numbers
Twilio's product is messages and phone numbers. Some of its coding problems use them directly. The algorithms are plain string work, but the hidden tests check every rule in the statement, edge cases included.
The four problems below follow Twilio's own rules for messages, numbers and addresses, and a layout problem from the senior assessment closes the set.
Each problem has one rule that breaks a first draft, like a count that grows a digit or a number that arrives with a leading plus sign. Find that rule in the statement and test it before you write the main loop.
TwilioPremium lesson · Coding round
The 4 Twilio problems are below.
- A Premium questionCoding · Medium · Frequently asked
- A Premium questionCoding · Medium · Frequently asked
- A Premium questionCoding · Easy
+ 1 more in this lesson
Each with hints, the follow-up and a tested solution.
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31 coding · 3 system design · 18 behavioral questions
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