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Zscaler DSA Interview Questions

Zscaler mixes medium DSA with networking and proxy internals, and a design round on distributed policy enforcement close to the user.

GreedyTrieRecursionDesignDynamic ProgrammingMath

16 real interview questions actually asked at Zscaler — filter by how recently they were reported.

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What Zscaler asks in the DSA round

Zscaler mixes medium DSA with networking and proxy internals, and a design round on distributed policy enforcement close to the user.

Across the 16 questions on this page, the weight sits on these patterns:

How to prepare for the Zscaler interview

  1. 1. Start at the top of the list above. The patterns are ordered by how often Zscaler uses them, so the first two or three buy you the most coverage per hour.
  2. 2. Solve by pattern, not at random. Doing eight greedy problems in a row is what makes the ninth recognisable in an interview — jumping between topics does not.
  3. 3. Tick problems off as you go so the gaps are visible. The per-pattern counts tell you which Zscaler topic you have actually covered.
  4. 4. Write the approach before the code. Zscaler interviews are judged on the reasoning as much as the working solution.
  5. 5. Pair this with the pattern guides when a topic is new, and the system design sheet if the role is senior enough to have that round.
  6. 6. If this is a campus or off-campus drive rather than a lateral move, the placement preparation guide covers the stages around the DSA round — aptitude, core subjects and the HR interview — in the order they actually happen.

Zscaler interview questions — FAQ

How many DSA questions does Zscaler ask?

This sheet collects 16 Zscaler interview questions, grouped into 13 patterns. They are questions reported as actually asked in Zscaler interviews, and each one carries how recently it was reported so you can practise the current set first.

Which topics should I focus on for a Zscaler interview?

Greedy, Trie, Recursion come first — the patterns on this page are ordered by how often Zscaler leans on them, so working top-down spends your time where the interview actually is. The full order is Greedy, Trie, Recursion, Design, Dynamic Programming, Math.

How long does it take to finish the Zscaler sheet?

At roughly 25 minutes per problem — reading it, solving it and writing the approach down — 16 problems is about 7 hours, or 1 weeks at ten hours a week. Most people do not need all of it: the first two or three patterns cover the majority of what gets asked.

Is this Zscaler question sheet free?

Yes. Every problem, the pattern grouping and the progress tracking are free and need no account. Progress saves in your browser, and signing in with Google only adds syncing across devices.

Can I track which Zscaler questions I have solved?

Yes — tick a problem on this page and it stays ticked. The counts per pattern update as you go, so you can see which of Zscaler's topics you have actually covered rather than guessing.

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