Product of Array Except Self: which companies ask it and how to practise

Product of Array Except Self is a Medium problem that 35 companies are reported to ask. This page shows who, how often and how recently, what the question tests, and how to practise it out loud with an interviewer who asks follow-ups. We link to the original problem statement instead of copying it.

Which companies ask Product of Array Except Self?

Public company lists attribute Product of Array Except Self, a Medium problem, to 35 companies. The most frequent askers are ThousandEyes, Asana and ZS Associates. 7 reports are from the last six months. It mainly tests array and prefix sum. Use this as a practice guide, not a promise.

Practise this kind of question aloud

Who asks Product of Array Except Self

35 companies appear in the public lists for this question. By how often each is reported: ThousandEyes (very often), Asana (very often), ZS Associates (very often), FreshWorks (very often), PayPal (very often), Avito (often), Uber (often), Okta (often), Apple (often) and Warnermedia (often), and 25 more. 7 of them were reported in the last six months, Asana, Amazon and Microsoft among them.

These are candidate reports collected in public lists, not statements from the companies. They are a good guide to what to practise and a poor guide to what you will be asked: interviewers change questions, and the same company asks different questions by team and level. Last reviewed 25 October 2026.

What Product of Array Except Self tests

It is rated Medium, which is the level most interviews are built around: expect to talk through two approaches, pick one, code it cleanly, and answer a cross-question on an edge case or a change to the constraints.

Arrays are the default container, so the interviewer is watching how you index, how you avoid a second full pass, and whether you notice when sorting or a hash map would remove a nested loop.

Prefix sums answer many range questions after one pass. Say what each stored value represents and how you subtract to get a range.

How to practise it

Do not just solve it silently. In a real interview you explain the approach before you code, write while you talk, and defend the solution to follow-ups. Set a timer, say the brute force and its cost first, then improve it, and finish by stating the time and space complexity and two edge cases you tested.

On giveinterview you can take this kind of question as a spoken interview: the AI interviewer opens with the problem, watches you code, asks cross-questions and ends with a scorecard. Your first 3 single-question interviews are free for life, every interview report is free, and a new account also gets 6 welcome credits.

Read the original statement here: https://leetcode.com/problems/product-of-array-except-self/ (opens the publisher's page). The statement is theirs; we do not reproduce it.

Questions to practise next

If you can solve Product of Array Except Self, try these next, chosen because they share its main topic and many of the same companies: Two Sum (Easy), Merge Intervals (Medium), Best Time to Buy and Sell Stock (Easy), Number of Islands (Medium), Group Anagrams (Medium) and Trapping Rain Water (Hard). Each has its own page in the questions list.

Frequently asked questions

Is Product of Array Except Self asked at Amazon?

Amazon appears in the public lists for Product of Array Except Self, reported often. Treat that as a reason to practise it, not a promise you will be asked it.

How hard is Product of Array Except Self?

Do I need to memorise the solution?

No. Interviewers listen for how you reason: the approach, the trade-offs, the edge cases and the complexity. Practise explaining it, not reciting it.

Sources and review date

Last reviewed 25 October 2026 Statements about other products come from their own public pages: