Chia sẽ câu hỏi pv backend dev
The article shares insights from an interview for a Backend Developer Intern position at FPT Telecom. It discusses three technical questions posed during the interview and the author's approaches to solving them. The author emphasizes the importance of understanding ACID principles, using Cron jobs, and implementing caching strategies for handling high traffic scenarios.
- ▪The author faced three technical questions during their interview for a Backend Developer Intern position.
- ▪One question involved handling race conditions in inventory management using ACID principles and pessimistic locking.
- ▪Another question addressed how to manage payment statuses when a webhook fails, suggesting the use of Cron jobs for proactive checks.
- ▪The final question focused on managing high traffic during flash sales, recommending caching and rate limiting as effective solutions.
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Story provenance
Source · retrieval · rights · ranking — open for full record
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Attribution is not the same as permission. This drawer separates discovery metadata, excerpts, WeSearch-generated summaries, reuse status, and whether the publisher receives the visit. Nothing here claims a legal grant the publisher has not made.
Record
| Original publisher | DEV.to (Top) |
| Canonical URL | https://dev.to/datweb07/chia-se-cau-hoi-pv-backend-dev-4n5j |
| Publication time | Wed, 27 May 2026 02:46:14 +0000 |
| Retrieval time | 2026-05-27T03:07:56.299Z |
| Last seen | 2026-05-27T03:07:56.299Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | Rz2LQfyfgChp |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 2903739) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Đạt Trương Thành Posted on May 27 Chia sẽ câu hỏi pv backend dev #backend #intern #redis #acid Hôm trước mình vừa trải qua một buổi phỏng vấn vị trí Backend Developer Intern tại FPT Telecom. Và mình được tech lead hỏi 3 bài toán sau.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at DEV.to (Top).
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