Solve three coding tasks: binary search, tree path, subarray

Q: Solve three coding tasks: binary search, tree path, subarray

This set of problems evaluates algorithmic problem-solving across binary search for identifying a unique element in a sorted array, N-ary tree traversal and path matching with non-unique node values, and array algorithms for finding the longest common contiguous subarray.

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Coding & Algorithms questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master coding & algorithms interviews.

Question

Solve the following coding tasks:

In a sorted array, every value appears exactly twice except for one value that appears once. Find the single value in O(log n) time and O(
extra space using a binary-search-based approach.
Given the root of an N-ary tree and a sequence of integers representing a path, determine whether this path exists in the tree. Each node may have multiple children and values are not guaranteed to be unique. A valid path must start from the root but does not need to end at a leaf node. Return true/false and analyze time and space complexity.
Given two integer arrays, compute the maximum length of a contiguous subarray that appears in both arrays. Discuss multiple approaches (e.g., dynamic programming; binary search on length with rolling hash) and their time/space trade-offs.

Solve three coding tasks: binary search, tree path, subarray

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