PWA Interview Questions

Core PWA Concepts

Common interview topics: PWA को क्या define करता है? Service worker lifecycle? Caching strategies? Offline-first और network-first के बीच difference? Service worker updates को कैसे handle करते हैं? App shell model क्या है?

Sample Q&A

Common PWA questions के लिए interview answer examples।

**Q: What's the difference between network-first and cache-first?**
A: Network-first fetches from the network first, falling back to cache if offline—ideal for pages that change often. Cache-first serves from cache immediately, checking the network for updates—ideal for static assets.

**Q: How do you handle service worker updates?**
A: Listen to the 'controllerchange' event and the 'message' event in the service worker. Use skipWaiting() to activate immediately or notify users to refresh.

**Q: What's the app shell model?**
A: The app shell is the minimal static shell (HTML, CSS, JS) cached aggressively. Dynamic content loads separately. This pattern enables instant loads and offline-first architecture.

Output:

Common interview questions and comprehensive answers prepared.

Interview Tips

Demo PWA build करके, caching strategies में trade-offs को explain करके, real-world PWA implementations (Twitter Lite, Spotify) को discuss करके और browser compatibility को समझकर prepare करें।

त्वरित जाँच

त्वरित जाँच: PWA में service worker का मुख्य उद्देश्य क्या है?

• Network requests को intercept करना, offline functionality को enable करना और caching को handle करना
• User interface को render करना
• User authentication tokens को store करना