GrindLoop: Android & iOS Interview Prep - Page 7 of 7 - Failed the interview? Not the next one.

The Null Check That Didn’t Save You

September 27, 2026September 11, 2026 by Arsam

Extreme close-up of code on a screen, illustrating a Compose null check crash

A Compose null check crash happens when a null check and a !! read mutable state twice. Why Kotlin refuses to smart-cast delegated state, the one-read fix and the interview answer.

Why a Good STAR Answer Still Gets You a Silent Rejection

September 26, 2026September 9, 2026 by Sara

Open blank notebook and pen on a desk, for preparing a STAR answer before a behavioral interview

A clean STAR answer can still end in a vague rejection. The missing piece is usually the expectation you set before acting. Here’s the same story with and without it.

What the Algorithm Round Actually Tests in Android Interviews

September 26, 2026September 9, 2026 by Hass

Close-up of code on a monitor, the kind of problem solved in an algorithm round

The algorithm round in an Android loop tests fluency, not Android knowledge. Why Kotlin is fine if you practice in it, and one problem worked through with what to say at each step.

The AI-Assisted Coding Round Is Coming to Android Interviews

September 26, 2026September 8, 2026 by Hass

Close-up of a code editor on a laptop screen, the setting of an AI-assisted coding round

The AI-assisted coding round tests whether you can judge an AI assistant’s output. How Meta’s version runs, one exchange told the weak way and the strong way, and how to prepare.

What the Senior Android System-Design Round Actually Tests

September 26, 2026September 6, 2026 by Hass

Laptop screen showing code in a dark room, for preparing the Android system design round

The senior Android system design round tests trade-off reasoning, not API recall. One StateFlow prompt with the correct and strong answers side by side, then two more prompts.

What the Android Take-Home Assignment Actually Tests

September 26, 2026September 6, 2026 by Hass

Laptop, open notebook and coffee on a wooden desk, set up to work on an Android take-home assignment

An Android take-home assignment tests judgment more than code. What reviewers check beyond the brief, how to size the design, and a complete sample README.

Why Your Combined StateFlow Shows Stale Data: SharingStarted.Lazily vs Eagerly

September 27, 2026September 5, 2026 by Arsam

Colorful source code on a monitor, illustrating a StateFlow stale data bug in Kotlin

A combined StateFlow returns stale data when stateIn uses SharingStarted.Lazily and a hardcoded Main scope. The two causes, the fix, how to choose a sharing strategy and the interview answer.