# Design an iterator — interview question | Aced (formerly Exponent) Aced (formerly Exponent) publishes a public search API over its indexed pages; the guide is at https://www.aced.io/agents/agent-access. Source: https://www.aced.io/questions/3242/design-iterator Source observed: 2026-11-04T23:11:34.092Z Last checked: 2026-11-04T23:11:34.092+00:00 Indexed: 2026-11-06T04:43:49.713+00:00 --- # Design an iterator. We provide this public Aced (formerly Exponent) question page for practicing technical interviews. The question concerns designing an iterator and is categorized under **Data Structures & Algorithms** and **Coding**. ## Question details - **Reported last asked:** 10 months ago - **Role:** [Software Engineer](https://www.aced.io/questions?role=swe) - **Companies:** [OpenAI](https://www.aced.io/questions?company=openai), [Apple](https://www.aced.io/questions?company=apple) - **Categories:** [Data Structures & Algorithms](https://www.aced.io/questions?type=algorithms), [Coding](https://www.aced.io/questions?type=coding) - **Interview records:** 2 interviews - **Access:** Detailed company statistics are available through [Upgrade](https://www.aced.io/upgrade?src=questions). ## Interview experiences We have one shared interview experience for this question: - [OpenAI · 10 months ago — Software Engineer](https://www.aced.io/experiences/openai-software-engineer-interview-20a84c) > “I got into the process through cold outreach plus a referral, and even that took a month or two of pushing before I got the first interview. After a pretty normal recruiter screen, I had two same-day phone rounds: one coding and one system design. The onsite was four rounds for me: coding, system design, technical deep dive on my own project, and behavioral. My big takeaway is that the coding bar is much more intense than standard big tech and feels closer to Anthropic, while the system design and behavioral pieces are more familiar. I was still waiting on the decision when we talked, and the biggest wildcard in the whole process was interviewer variability.” The associated company image is [OpenAI’s logo](https://exponent-static.s3.amazonaws.com/company_logos/openai.png). ## Community answers No community answers have been contributed yet. To answer, [log in or sign up](https://www.aced.io/signup?src=nav&returnPath=/questions/3242/design-iterator). Submitting an answer marks the question complete. ## Related questions - [Design an elevator.](https://www.aced.io/questions/235/design-elevator) - [Design an office refrigerator.](https://www.aced.io/questions/341/design-office-refrigerator) - [Design a smart refrigerator.](https://www.aced.io/questions/2117/design-smart-refrigerator) ## Related courses ### [Software Engineering Interview Prep](https://www.aced.io/courses/software-engineering) ![Software Engineering Interview Prep](https://images.ctfassets.net/x78yjrjc11pq/4VkuYewBHUFIVUS5oJDW5h/02e833439b1289f25f38f13f81cbdca3/adobe_stock_optimized.jpeg?w=800&h=800&fm=webp&q=75) We help candidates pursue software engineering roles at Google, Amazon, Microsoft, Meta, Apple, and other top companies. 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