Zscaler is a leading cloud security company known for its innovative cybersecurity solutions and is committed to helping global organizations address cybersecurity challenges through a zero-trust architecture. The overall process of their interviews is relatively compact and the content covers a wide range of knowledge. Recently, our students just finished the Zscaler OA, so we share it while it's still hot, and we hope that after reading it, we can have a clear understanding of Zscaler's interview process and be better prepared for the actual interviews.
Zscaler OA Process Overview
| annular ring | element |
| flat-roofed building | HackerRank |
| time limit | 45-60 minutes |
| Number of topics | 2 Programming Questions + 2-3 Logical Questions |
| Assessment methods | Programming questions assess correctness, code clarity and optimization skills, and theory questions examine understanding of the fundamentals. |
| Adoption of standards | Even if some of the questions are not fully answered, if the code is well structured and well thought out, you may be able to pass the assessment and move on to the next round of interviews. |
Zscaler OA (Online Assessment) Questions
Problem 1: Find Consecutive Sequences
Problem Description.
You are given a sequence of integers. Find all the sequences of at least three consecutive elements such that the sum of those elements is greater than a given number. You are given a sequence of integers.
Input:
An integer array arr of length n and a number threshold.
Output:
Return a list of lists, each containing a subsequence of at least three consecutive elements where their sum is greater than the given threshold.
Problem 2: Sorting an Array of Strings
Problem Description.
Given an array of strings, sort the strings in lexicographical order. If two strings are equal, the one with a smaller length should come first.
Input:
An array of strings.
Output:
Return the sorted array of strings.
Problem 3. SQLQuery
Problem Description.
Write a SQL query to calculate the number of users who have made at least one purchase in the past 30 days.
Input:
A table of user_purchases with columns user_id, purchase_date, and amount.
Output:
Return the number of unique users who made purchases within the past 30 days.
Interview Thoughts & Tips
Zscaler's interviews are very fast-paced and wide-ranging, covering not only algorithms and SQL, but also Java basics, debugging, system design, network protocols, and REST API. The most easily overlooked questions are debug and network questions. Many students didn't prepare in advance, and were directly confused on the spot.
I was able to pass this time because of programhelp's voice assistants. Not only did they give me real-time tips during the exam, but they also gave me a lot of targeted simulation questions based on the requirements of the position, and when I couldn't write, the rhythm of the voice prompts was very natural and didn't make people panic.
Frequently Asked Questions
Q: Zscaler's OA Is it hard?
A: The difficulty lies in the variety of questions and knowledge, but not in the pursuit of very difficult algorithms. As long as the preparation is comprehensive and the thinking is clear, the whole can be dealt with.
Q: How to prepare debug questions?
A: It is recommended that you focus on preparing for Java multithreading, synchronized, thread scheduling, and shared variables, and the debug simulation questions provided by programhelp are very useful.
Q: Are remote interviews supported?
A: Yes, the whole process is done online, and note that the OA has to turn on the camera.
Q: Is Zscaler friendly to New Grad?
A: Overall friendly, focusing on whether the fundamentals are solid, especially Java/OOP/networking concepts should be clear.
Want to pass Zscaler OA & Interview successfully? Don't prepare blindly alone anymore!
Zscaler's interviews are really "multi-front" and there are no programhelp I'm not sure if I can get through with remote voice assistance and brushing up on the questions in the early stages. Our team has simulated more than 50 sets of similar OA & interview question types, with no trace of voice prompts + online real-time assistance, to help you lock the score + improve expression.
To take the Zscaler offer, or any other security or distributed position, feel free to come to us!
