Apple interview notes, page 12 of 38

FAANG / Big Tech

Most of these Apple write-ups come from Software Engineers (212), then Machine Learning Engineers (85) and Data Scientists (32). The most reported rounds are the technical phone screen (217), the system design round (48), the product sense round (29) and the behavioral / leadership round (22).

372 interview notes · updated Oct 2026

Apple·Software Engineer·Technical Phone Screen

May 2026

Apple SWE interview focused heavily on operations experience, which I wasn't fully expecting. The depth they wanted on incident response and SLO/SLI stuff felt more SRE-adjacent than a typical software engineering round.

Walk me through your operations experience, including on-call rotations and how you've participated in incident response.
How have you defined and tracked SLOs and SLIs for services you owned or contributed to?
Have you written runbooks? What went into them and how did your team actually use them?
Describe a high-severity incident you handled. What was your role, what decisions did you make, and what came out of the postmortem?
How have you approached change management for production systems, and what tooling did you rely on?

“I talked through a couple of on-call rotations I'd been part of and the tooling we used for alerting.”

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Apple·Machine Learning Engineer·Onsite - Behavioral / Leadership

May 2026

Behavioral round for an MLE role at Apple, two questions back to back about how you handle competing demands and cross-team blockers. Pretty standard stuff on paper but the follow-up probing made it trickier than expected.

Describe a situation where you had conflicting priorities across multiple stakeholders or urgent projects. How did you decide what to take on first, and how did you communicate the deprioritization to whoever got pushed back?
Tell me about a time another team's work was blocking yours. What did you do to move forward, whether that meant escalating, finding a workaround, building a relationship, or something else entirely?

“The second half of this question is the part people forget to prep.”

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Apple·Software Engineer·Technical Phone Screen

May 2026

Apple SWE interview, just one question about debugging. Not much to go on but it came up and I figured I'd log it.

Walk me through how you troubleshoot bugs in your code.

“Pretty open-ended, which I wasn't expecting.”

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Apple·Software Engineer·Technical Phone Screen

May 2026

Apple Data Engineer screen with a Python OOP coding problem. The setup was a bit unusual since they gave you a parent class with precomputed data and made you build on top of it, which I wasn't expecting.

You're given a Parent class that precomputes frequency counts of items from a list into a dictionary. Implement a method in the Child class that returns the most frequent key(s) without using Python's built-in max() function. Handle ties by returning all tied keys, and return an empty list if the input is empty.

“The no-max() constraint is what made this annoying.”

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Apple·Machine Learning Engineer·Technical Phone Screen

May 2026

Apple ML engineer screen that ended up being heavier on string algorithms than I expected. One problem, but it had enough layers to keep me busy for the full slot.

Given a list of words and a string s, wrap every substring of s that matches any word in the list with bold tags. Adjacent or overlapping matches should be merged into a single pair of tags. How do you approach this, and what are the tradeoffs between a brute-force scan versus a Trie or multi-pattern matching approach?

“Started with the brute-force: for each word, scan s for all occurrences and mark those index ranges.”

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Apple·Frontend Engineer·Technical Phone Screen

May 2026

Apple frontend round, pretty deep on React internals. The error handling topic sounds broad but they really pushed on the specifics, so surface-level answers weren't going to cut it.

Walk me through how you'd handle errors in a React application, including both render-time and async scenarios.
How would you design a fallback UI for a component subtree that might fail, and how does that integrate with Suspense?
How do you approach logging and monitoring frontend errors in production, and what do you send to a service like Sentry?

“I started with error boundaries and felt pretty good about componentDidCatch and getDerivedStateFromError, but then I kind of fumbled when they pushed on async event handlers.”

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Apple·Software Engineer·Technical Phone Screen

May 2026

Apple SWE interview with a system design coding problem that was more nuanced than it looked on the surface. The question was about an in-memory hit counter and it required thinking carefully about data structure tradeoffs and space constraints.

Design an in-memory hit counter with two operations: one to record a hit at a given timestamp, and one to return the total number of hits in the last 300 seconds. Timestamps are integer seconds and arrive in non-decreasing order. Aim for O(1) amortized time per operation and O(300) space, and explain how you'd expire old data without storing every hit individually. Write the API and unit tests.

“I went straight to a circular buffer of size 300, keyed by timestamp mod 300, storing a count per second bucket.”

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Apple·Frontend Engineer·Technical Phone Screen

May 2026

Apple frontend interview with a coding problem that felt more CS fundamentals than frontend. The question wasn't crazy hard but the constraints made you think twice about your approach.

Given an unsorted integer array of roughly 75 elements that may contain duplicates, zero out all duplicate values keeping only the first occurrence of each, then sort the resulting array without using any built-in sort functions. Explain the time and space complexity of your solution.

“The deduplication part clicked pretty fast.”

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Apple·Software Engineer·Technical Phone Screen

May 2026

Apple SWE interview that came down to a trie implementation question. Pretty standard coding round, nothing too wild, but the details matter more than you'd think.

Implement a Trie data structure with insert, search, and prefix-based lookup methods.

“I knew the concept well enough but fumbled the node structure at first.”

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Apple·Software Engineer·Hiring Manager Screen

May 2026

Hiring manager chat for a software engineer role at Apple. Pretty conversational, they wanted to hear about past projects and what I actually owned versus just contributed to. Not a technical screen, more of a 'who are you and what do you want' kind of conversation.

Walk me through your work experience and the key projects you've been involved in.
What did you personally own on those projects, and what were you just contributing to?
What's the most important thing you took away from your recent work?
What kinds of problems are you hoping to work on next?

“The classic opener.”

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