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Accenture·Software Engineer·Onsite - System Design / Architecture·Intermediate

IntermediatePrefer not to say
Apr 2026

Summary

Accenture technical interview for what seemed like a mobile or software engineering role. One question, pretty open-ended, and I felt like I was winging it the whole time.

Questions Asked (1)

Q1

Walk me through the technical architecture you'd use to build a mobile alarm clock app.

System DesignTechnical Trade-offsAPI & Integrations
Author's notes

Seemed deceptively simple and I almost undersold it.

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AI HintsAI Generated

Suggested Approach

Start by clarifying requirements (platforms, offline support, reliability expectations) and then propose a layered architecture: native UI, local scheduling/alarm manager, and optional cloud sync. Emphasize reliability, battery efficiency, and trade-offs between native and cross-platform approaches.

Pro tip: Highlight the critical role of OS-level alarm APIs (e.g., Android AlarmManager, iOS UNUserNotificationCenter) and how you'd handle edge cases like device reboots and battery optimizations. Show awareness that a missed alarm is a critical failure, so testing and fallback mechanisms are essential.

1. Clarify Requirements and Constraints

Ask about target platforms, offline functionality, sync needs, and reliability expectations. This shapes the entire architecture.

2. Choose Client Architecture

Decide between native (Swift/Kotlin) or cross-platform (React Native/Flutter) based on performance and access to OS-level alarm APIs. Justify your choice with trade-offs.

3. Design Core Alarm Scheduling

Leverage platform-specific alarm managers to schedule local notifications. Ensure alarms persist across reboots and handle timezone changes.

4. Plan Data and Sync Layer

If cloud sync is needed, design a backend (e.g., REST API with a database) to store alarm settings and user preferences. Use conflict resolution for offline edits.

5. Address Reliability and Edge Cases

Implement fallbacks (e.g., multiple alarms), battery optimization exemptions, and thorough testing on real devices. Discuss monitoring for missed alarms.

Key Points to Mention

  • Use of native alarm APIs (Android AlarmManager, iOS UNUserNotificationCenter) for precise scheduling.
  • Handling device reboots and app kills by re-registering alarms on boot.
  • Battery optimization trade-offs: exact vs inexact alarms, and requesting exemptions.
  • Offline-first design with optional cloud sync using a backend like Firebase or custom REST API.
  • Cross-platform vs native trade-offs: performance, development speed, and access to system APIs.
  • Testing strategy: unit tests for scheduling logic, integration tests on real devices, and monitoring for missed alarms.

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.