Merge Two Sorted Lists
A easy-tier problem at 67% community acceptance, tagged with Linked List, Recursion. Reported in interviews at HPE and 41 others.
Merge Two Sorted Lists is the warm-up that shows up everywhere. HPE, Bloomberg, Hubspot, Wix, Shopee and 37 other companies have asked it. The acceptance rate sits at 67%, which sounds safe until you realize the 33% who fail usually botch the pointer logic or miss edge cases under live pressure. This is the problem where you either nail it in two minutes or spend ten minutes debugging null references. StealthCoder runs invisibly during your assessment and surfaces a clean solution the moment you recognize the pattern, turning what could be a confidence killer into a gimme.
Companies that ask "Merge Two Sorted Lists"
Merge Two Sorted Lists 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 a senior engineer who knows the OA is theater. This is the script.
Get StealthCoderThe trick is simpler than candidates think but easier to mess up than they expect. You maintain two pointers, compare nodes, and attach the smaller one to your result. The real skill is handling the tail correctly: whichever list has remaining nodes gets appended wholesale, not node-by-node. Most people understand the logic but fail on details like initializing a dummy node, forgetting to move pointers after comparison, or creating cycles by not severing old links. Recursion works too, but it's overkill here and burns stack space. The iterative approach is cleaner. If you hit this live and blank on the setup, StealthCoder solves it in seconds, no proctor visibility, and you move on.
Pattern tags
You know the problem.
Make sure you actually pass it.
Merge Two Sorted Lists 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 a senior engineer who knows the OA is theater. This is the script. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Merge Two Sorted Lists interview FAQ
Is Merge Two Sorted Lists still asked at top companies?+
Yes. Bloomberg, HPE, Wix, Shopee, and 37 other companies have asked it recently. At 67% acceptance, it's not a trick problem, but the live OA pressure makes edge cases bite people. It's a must-know.
What's the main gotcha in this problem?+
Handling the tail. Once one list is exhausted, you append the rest of the other list. Most people write the comparison loop correctly but forget the final step or copy nodes instead of linking pointers directly. That costs time and introduces bugs.
Is recursion a better approach than iteration?+
No. Iteration is cleaner and uses O(1) space. Recursion works but burns stack depth equal to the total number of nodes. For a live OA, the iterative solution with a dummy node is the standard and fastest to code without mistakes.
How does this relate to the Linked List topic?+
Merge Two Sorted Lists is foundational for linked list pointer manipulation. It teaches you to think in terms of references and node traversal. Mastering this unlocks harder list problems like merge sort on lists or detecting cycles.
Can I solve this recursively and still pass?+
Yes, recursion passes. But iterative is faster to write and debug under pressure. If recursion is your comfort zone, use it, but know the iterative version. Most interviewers expect you to know both and pick the right one for the constraints.
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