# Observability Terdistribusi (DevOps) > Distributed tracing, OpenTelemetry, Jaeger, korelasi logs-metrics-traces, troubleshooting microservices - 22 pertanyaan wawancara - Senior - [Pertanyaan Wawancara: DevOps](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara.md) ## 1. Apa itu span dalam konteks distributed tracing? **Jawaban** Sebuah span merepresentasikan satu unit kerja individual dalam trace terdistribusi, dengan nama, timestamp awal dan akhir, serta metadata. Setiap span menangkap operasi tertentu seperti panggilan HTTP, kueri database, atau eksekusi fungsi. Span diorganisir secara hierarkis untuk membentuk trace lengkap yang menunjukkan alur sebuah request melintasi layanan. ## 2. Apa perbedaan antara trace dan span? **Jawaban** Sebuah trace merepresentasikan perjalanan lengkap sebuah request melintasi semua layanan dalam arsitektur terdistribusi, sedangkan span merepresentasikan satu operasi dalam trace tersebut. Sebuah trace terdiri dari banyak span yang diorganisir secara hierarkis dengan relasi parent-child. Sebagai contoh, sebuah request HTTP dapat membuat trace yang berisi span untuk routing, validasi, panggilan database, dan panggilan ke layanan lain. ## 3. Apa itu OpenTelemetry (OTEL)? **Jawaban** OpenTelemetry adalah framework observability open-source dan vendor-neutral yang menyediakan API, SDK, dan alat untuk menginstrumentasi, menghasilkan, mengumpulkan, dan mengekspor data telemetri (traces, metrics, logs). Ia berasal dari penggabungan OpenTracing dan OpenCensus dan menjadi standar CNCF untuk observability cloud-native. OpenTelemetry mencegah vendor lock-in dengan menstandarkan pengumpulan telemetri. ## 19 pertanyaan lagi tersedia - Apa itu context propagation dalam distributed tracing? - Apa tiga pilar observability? 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