How should I practice Longest Common Parent Directory?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Google onsite interview problems in FastPrep.

Is Longest Common Parent Directory associated with Google?

FastPrep tags this as a Google onsite interview coding practice problem when the problem catalog has that company and stage context.

Longest Common Parent Directory

Google● EasyINTERNONSITE INTERVIEW

Problem statement

You are given one or more normalized absolute Unix-style file paths. Every path begins with /, contains no empty component and no . or .. component, and its final component is a file name.

The problem statement continues

Pro

Examples

Example 1

paths = ["/home/user/docs/a.txt","/home/user/docs/b.txt","/home/user/photos/c.jpg"]return = "/home/user"

All three files are beneath /home/user, but they do not all share the next directory.

FastPrep Pro

Reported in 1 Google interview this week

Unlock this recently reported problem

FastPrep Pro gives you full access to interview problems reported within the last week.

Full problem statement and constraints
2 more worked examples, explained
Guided hints and editorial
Run your code on real test cases

$8.25/month

$99 billed yearly — or $19 month-to-month. Cancel anytime.

Free plan — 2 of 2 free unlocks used this week

See Google hiring insights