
I just finished Okta’s CodeSignal OA. There was only one question, and I had two hours to complete it, so the time was more than enough. The OA must be completed within seven days, the difficulty is moderate, and you can use your own IDE.
I am really grateful for the tool Linkjob.ai, which is also why I’m sharing my entire interview experience here. Having an invisible AI assistant during the interview is indeed very convenient.


To solve this problem, we can use a breadth-first search (BFS) combined with line-of-sight preprocessing to ensure we find a valid path from the start to the end while avoiding the gaze of strangers.
Preprocessing: Identify Start, End, and Stranger Line of Sigh
Locate start (A) and end (bottom-right, i.e., (N-1, M-1)): Traverse the grid to find the start and end positions.
Mark strangers’ line of sight: For each stranger (<, >, ^, v), scan along their facing direction until encountering an obstacle (X), another stranger, or the grid boundary. Mark all walkable cells (.) along this path as “observed.”
BFS Traversal of Walkable Paths
Use a queue for BFS, keeping track of visited cells to avoid revisits, and follow these rules:
Move only to empty cells (.) that are not in a stranger’s line of sight.
Do not move onto obstacles (X), cells occupied by strangers, or already visited cells.
Each step can move up, down, left, or right (adjacent cells sharing an edge).
Termination Conditions
If BFS reaches the end, return true.
If the queue is empty and the end is not reached, return false.
Complexity Analysis
Time Complexity: Preprocessing the line of sight takes O(N × M × max(N, M)) (each stranger scans up to N or M steps). BFS takes O(N × M) (each cell is visited at most once). Overall, the time complexity is O(N × M × (N + M)), which is efficient for N, M ≤ 500.
Space Complexity: Storing visited status, line-of-sight markings, and the BFS queue requires O(N × M) space, which meets the problem constraints.

Data Structures & Algorithms: Expect problems centered on arrays, strings, hash maps, linked lists, and trees. Common challenges include sorting, searching, dynamic programming, and graph traversal.
Logical Puzzles: Some questions test your ability to decipher patterns or solve situational logic problems (like the “sneak path” problem discussed earlier, where you navigate a grid while avoiding detection).
String Manipulation: Tasks may involve parsing, formatting, or transforming strings.
Math & Simulation: Problems that require mathematical reasoning or simulating real-world scenarios.
Effective time management is critical to completing the assessment successfully, especially given its single-question structure and 120-minute duration. Here’s how to structure your approach:
Single Question Allocation: Since the Okta Code Signal test consists of one problem with a 120-minute time limit, divide your time into three phases:
Problem Analysis (20–25 minutes): Thoroughly understand the problem statement, identify edge cases, and outline your solution approach.
Coding & Testing (70–80 minutes): Implement your solution, write test cases, and debug incrementally. Leverage the platform’s test case runner to validate your code against sample inputs and edge scenarios.
Final Review (15–20 minutes): Refactor for readability, optimize time/space complexity if needed, and double-check for logical errors or off-by-one mistakes.
Pace Monitoring: Even with 120 minutes, avoid getting stuck in one phase. If you spend over 30 minutes on problem analysis without a clear plan, pivot to coding a basic solution and refine it later. Conversely, if coding takes longer than 80 minutes, prioritize correctness over optimization for the remaining time.
Code Editor: A full-featured editor with syntax highlighting, auto-completion, and support for languages like Java, Python, C++, and more.
Test Cases: You can run custom test cases and view output directly in the interface. Use this to debug your code incrementally.
Problem Statement & Examples: The problem description, examples, and constraints are displayed prominently, allowing you to reference them as you code.
Mixing different study tools helped me learn faster. Here are some resources that worked for me:
Practice coding challenges on platforms like Leetcode. I focused on mid-hard level problems.
Review system design basics. I learned how different parts of a system work together and why design matters.
Ask questions if a problem seems unclear. During practice, I made sure to clarify anything I did not understand.
Use mock interview tools like Linkjob.ai to practice. These tools offer question sets based on real interview experiences, deliver personalized guidance tailored to your resume and the role you’re applying for, and even follow up with additional questions based on your answers, making your practice sessions highly targeted.
I picked up a few tricks that saved me time and stress:
Read all questions first. Focus on the key points of the problem and make sure you fully understand the requirements before you start answering.
Use the run code feature often. Catch bugs early instead of waiting until the end.
Double-check your answers if you have time left. Small mistakes can cost points.
During my okta codesignal assessment, I found that a few strategies made a big difference. I focused on learning more than one programming language. This helped me switch between JavaScript and Python when I needed to solve different problems. I also spent time building my online presence. I shared code on GitHub and connected with other developers on social media. This gave me confidence and helped me learn new tricks. I researched Okta and the role before the test. I wanted to understand what the company values and what skills they look for. I practiced mock interviews with friends. This helped me get comfortable with talking through my solutions and explaining my thought process.
Here are the top approaches that worked for me and other successful candidates:
Learn multiple programming languages.
Build a strong online presence.
Research the company and the role.
Practice technical interviews.
Explore what top companies expect from candidates.
I got the OA the day after I submitted my resume. They gave me seven days to complete it, but in reality, it can be finished in about an hour.
Yes, it’s possible. A friend of mine had this situation. He failed two test cases on the performance section, but a few hours later he received an email scheduling an HR call, which was quite surprising.
Okta’s current hiring process is: first round HR, second round HM, third round OA, fourth round on-site, and fifth round VO.
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