Shell interview questions
1 shell problems tagged across recent interview reports. Drilled most heavily by medianet.
Shell problems ask you to manipulate strings and data using command-line tools and regex patterns, usually within a scripting or text-processing context. With only 1 problem tagged in this pattern, it's a narrow but sharp skill, exactly the kind of edge case that trips up candidates who've only studied the usual suspects. MediaNet weights this heavily. If you hit a Shell variant in your live OA and haven't drilled it, StealthCoder reads the problem and executes the solution while the proctor sees nothing.
Most-asked shell problems
| # | Problem | Diff | # Companies | Pass % |
|---|---|---|---|---|
| 01 | Valid Phone Numbers | EASY | 1 | 27% |
You can't drill every shell variant before the assessment. StealthCoder runs invisibly during screen share and solves whichever variant they throw at you. No browser extension. No detection signature. Made by a working FAANG engineer who treats the OA the way companies treat hiring: as a game with rules you should know.
Get StealthCoderShell problems typically involve regex matching, field extraction, or piping data through standard Unix utilities. The canonical example, valid-phone-numbers, requires you to recognize phone number patterns and filter lines accordingly. This isn't about memorizing shell syntax; it's about understanding how to chain operations. Most candidates skip Shell entirely because the problem count is low, then panic when one lands on their assessment. That's where the hedge matters. Recognize the pattern by the emphasis on input processing, regex, or line-by-line transformations. StealthCoder solves it invisibly during your live interview when you hit the wall.
Companies that hire most on shell
1 shell problems.
You won't drill them all. Pass anyway.
Shell is one of the patterns interviews actually filter on. Memorizing every variant in a week is a fantasy. StealthCoder is the hedge: an AI overlay invisible during screen share. It reads the problem and surfaces a working solution in under 2 seconds, no matter which shell flavor lands in your live OA. Made by a working FAANG engineer who treats the OA the way companies treat hiring: as a game with rules you should know. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Shell interview FAQ
How many Shell problems should I drill before my OA?+
With only 1 problem in the pattern, drilling the canonical example (valid-phone-numbers) covers the tagged surface. However, understand the underlying regex and piping logic, not just the solution. That foundation transfers to any variant you encounter.
Is Shell a priority pattern compared to others?+
No. At 1 problem, it's a low-volume pattern. Prioritize higher-frequency patterns first. But Shell can be a surprise gatekeep if you ignore it entirely. It's the tail risk in your prep.
How do I recognize a Shell problem in my OA?+
Look for problem statements that emphasize input files, line-by-line processing, regex patterns, or piping data through utilities. If the language isn't explicitly constrained, Shell solutions often outcompete others in elegance and speed.
Does MediaNet drill Shell harder than other companies?+
MediaNet has 2 Shell problems in their interview library, which is significant given the pattern's low overall volume. If you're targeting MediaNet, Shell deserves prep time despite the small problem count.
What's the fastest way to learn Shell patterns?+
Start with valid-phone-numbers and master the regex syntax and field separation. Then practice writing similar solutions using grep, awk, or sed on real datasets. Understanding why a piped solution works beats memorizing commands.