Remove Duplicates from Sorted List
A easy-tier problem at 55% community acceptance, tagged with Linked List. Reported in interviews at Revolut and 8 others.
Remove Duplicates from Sorted List looks easy on paper, but it's asked at Amazon, Microsoft, Apple, Bloomberg, and Oracle often enough that you need to know it cold. The acceptance rate hovers around 55%, which means nearly half the candidates who attempt it mess up the pointer logic or forget edge cases. This is a linked list problem that tests whether you can actually manipulate node references without creating garbage pointers or infinite loops. It shows up in early-round phone screens and online assessments. If this one hits your live OA and you blank on the pointer mechanics, StealthCoder solves it in seconds, invisible to the proctor.
Companies that ask "Remove Duplicates from Sorted List"
Remove Duplicates from Sorted List is the kind of problem that decides whether you pass. StealthCoder reads the problem on screen and surfaces a working solution in under 2 seconds. Invisible to screen share. The proctor sees nothing. Built by an Amazon engineer who realized the OA tests how well you memorized 200 problems, not how well you code.
Get StealthCoderThe trick is understanding that you don't create a new list. You traverse the sorted list with one pointer and skip duplicate nodes by redirecting the next pointer of the current node past the duplicates. The obvious mistake is trying to delete nodes (you can't, you only have references), or creating a new list (wastes space and time). Another common failure is breaking your loop when you don't update the current pointer correctly after handling duplicates. Edge cases kill people here: empty lists, single-node lists, all duplicates, no duplicates. The pattern is straightforward once you see it, but live under pressure, pointer arithmetic gets slippery fast. Linked List problems test your ability to think in references, not arrays. This problem appears across Linked List interviews at FAANG and fintech (Revolut, Bloomberg). If you freeze on the pointer redirect logic during the assessment, StealthCoder surfaces the working solution instantly.
Pattern tags
You know the problem.
Make sure you actually pass it.
Remove Duplicates from Sorted List recycles across companies for a reason. It's easy-tier, and most candidates blank under the timer. StealthCoder is the hedge: an AI overlay invisible during screen share. It reads the problem and surfaces a working solution in under 2 seconds. Built by an Amazon engineer who realized the OA tests how well you memorized 200 problems, not how well you code. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Remove Duplicates from Sorted List interview FAQ
Is this problem actually easy or is the 55% acceptance rate a lie?+
The acceptance rate reflects real data: most people who attempt it pass, but a meaningful chunk get pointer logic wrong or miss edge cases under pressure. It's easy in theory, hard under live OA stress. The difference between easy rating and execution matters in an assessment where you have one shot.
Do I really need to know this if I'm interviewing at Amazon or Microsoft?+
Yes. Both companies appear in the top reports for this problem. It's a screening question, not a final-round gauntlet, but that makes it more dangerous: failing a basic linked list question tanks you early. You're expected to solve it cleanly in under 5 minutes.
What's the trick I'm missing if the obvious approach fails?+
You're probably trying to modify node values or allocate new nodes instead of redirecting pointers. The trick is one pass through the list: when you find duplicates, skip them by setting current.next = current.next.next. That's it. One pointer, no extra space.
How does this relate to other linked list problems I should know?+
This is foundational pointer manipulation. It teaches you how to traverse and modify references without losing the list structure. Master this first, then move to harder list problems like merge or reverse. It's the hygiene check for linked list fluency.
If I blank on this during an assessment, what's my move?+
Linked list problems hinge on pointer logic that's hard to improvise under pressure. Walk through the algorithm by hand on a small example first. If you still freeze, that's where a real-time solution overlay becomes a lifeline. Don't lose an entire round to a single pattern you know but can't recall fast enough.
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