Validate array sorted
Last updated: January 10, 2026
Quick Overview
Given an array of integers, write a function to determine if the array is sorted in non-decreasing order. The function should return true if the array is sorted and false otherwise. The input will be an array of integers, and the output will be a boolean value.
Databricks
January 10, 2026135
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3,566 solved
Given an array of integers, write a function to determine if the array is sorted in non-decreasing order. The function should return true if the array is sorted and false otherwise. The input will be an array of integers, and the output will be a boolean value.
Coding interviews at Databricks focus on problem-solving approach as much as the final solution. The interviewer wants to see you break down the problem, consider edge cases, and optimize iteratively. Communication throughout the process is key.
What the Interviewer Expects
- Identify the correct data structure and algorithm for the problem
- Write clean, bug-free code with proper variable naming
- Analyze time and space complexity correctly
- Handle basic edge cases (empty input, single element)
- Communicate your thought process while coding
Key Topics to Cover
How to Approach This
- Clarify input constraints and edge cases before writing code.
- Walk through your approach verbally and confirm with the interviewer before coding.
- Start with a brute force solution, then optimize. Mention time and space complexity.
- Test your solution with examples, including edge cases like empty input or duplicates.
- Consider common patterns: sliding window, two pointers, hash map, BFS/DFS, dynamic programming.
Possible Follow-up Questions
- Can you solve this iteratively instead of recursively (or vice versa)?
- How would your solution change if the input was sorted?
- How would you modify your solution to handle streaming input?
- What happens if the input contains duplicates?
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Problem Analysis
To determine if an array is sorted in non-decreasing order, we can apply a straightforward approach to check each element against the next one. The pattern we will use here is a simple linear traversa...
Approach
- Initialize a loop that iterates through the array from the first element to the second-to-last element.
- For each element, compare it with the next element in the array.
- If the current ele...
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