This is a premium problem. We're working on making it available for free soon.
Explore Free ProblemsSolutions for this premium problem will be available for free soon.
Browse Free ProblemsWatch expert explanations and walkthroughs
Practice problems asked by these companies to ace your technical interviews.
Explore More ProblemsJot down your thoughts, approach, and key learnings
Yes, variations of this problem are common in technical interviews at companies like Google and Amazon. It tests understanding of binary search, boundary discovery, and working with limited APIs or unknown data sizes.
The optimal approach combines exponential range expansion with binary search. First, double the search boundary until the target is within range, then apply binary search within that interval to locate the target efficiently.
Exponential search helps identify a valid search range when the array length is unknown. By doubling the boundary index, you can quickly reach a range that likely contains the target before applying binary search.
The problem relies on the properties of a sorted array and the binary search technique. The key challenge is handling the unknown size using an API-like interface that simulates restricted access to the array.