Two Pointers interview questions
141 two pointers problems tagged across recent interview reports. Drilled most heavily by meta, yandex, and amazon.
Two Pointers is a spatial technique where you maintain two cursors moving through a data structure, usually a sorted array or linked list, to solve problems in linear time without extra space. With 141 problems tagged this way, it's one of the most drilled patterns in interviews. Meta sees 84 Two Pointers problems in their hiring pipeline; Amazon, Bloomberg, and Microsoft each run 76 to 78. If you can't recognize the pattern or get stuck on a variant, your OA stalls. StealthCoder reads the problem in real time and solves it while you stay invisible to the proctor.
Most-asked two pointers problems
Showing top 50 of 141 two pointers problems by # companies asking.
You can't drill every two pointers variant before the assessment. StealthCoder runs invisibly during screen share and solves whichever variant they throw at you. No browser extension. No detection signature. Built by an Amazon engineer who used it to pass JPMorgan's OA and system design loop.
Get StealthCoderTwo Pointers splits into a few clear subtypes: convergent (pointers start at opposite ends and move inward, used for 3Sum and container problems), divergent (pointers start in the middle and expand outward), and same-direction (both pointers move forward at different speeds, often for slow/fast linked list work). You'll recognize it when you see a sorted or partially sorted array and a target relationship, sum, triplet, partition, that smells like O(n) rather than O(n²). Drill convergent patterns first: 3Sum, 4Sum, and 2Sum variants. Then move to same-direction work like Backspace String Compare and Boats to Save People. When a Two Pointers variant hits your live assessment and you're uncertain about the pointer movement logic, StealthCoder bypasses the thinking lag and delivers a working solution in seconds.
Companies that hire most on two pointers
141 two pointers problems.
You won't drill them all. Pass anyway.
Two Pointers 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 two pointers flavor lands in your live OA. Built by an Amazon engineer who used it to pass JPMorgan's OA and system design loop. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Two Pointers interview FAQ
How many Two Pointers problems should I drill before an interview?+
Aim for 12 to 15 problems across all subtypes. Start with convergent (3Sum, 4Sum), then same-direction (linked list cycles, string matching). At 141 total problems, you're seeing depth; hit the main variants, not all 141.
Which companies drill Two Pointers the hardest?+
Meta leads with 84 problems in their hiring pipeline. Yandex follows at 79. Amazon, Bloomberg, Microsoft, and Google each have 75 to 78. If you're interviewing at any of these, Two Pointers is non-negotiable.
How do I recognize a Two Pointers problem in the wild?+
Look for sorted input, a target relationship (sum, distance, or pairing), and a need for O(1) space or O(n) time. If the naive solution is O(n²) nested loops, Two Pointers almost always cuts it to O(n) with two passes.
Is Two Pointers the most important pattern for FAANG?+
It's top-tier. Google, Apple, and Microsoft each tag 64 to 75 problems with it. You'll see it in roughly one in three problems. Binary Search and Hash Map rank alongside it, but Two Pointers is unavoidable.
What's the hardest Two Pointers subtype to drill?+
Same-direction pointer work on linked lists and strings (Backspace String Compare) trips up most candidates. Convergent (3Sum variants) is more intuitive. Practice same-direction extensively; it's where most interview flubs happen.