# Data Lake - Arsitektur dan Ingesti (Data Engineering) > Arsitektur Data Lake, zona (raw/refined/curated), format (Parquet, Avro, JSON), ingesti, partisi - 20 pertanyaan wawancara - Mid-Level - [Pertanyaan Wawancara: Data Engineering](https://sharpskill.dev/id/technologies/data-engineering/pertanyaan-wawancara.md) ## 1. Apa itu Data Lake? **Jawaban** Data Lake adalah sistem penyimpanan terpusat yang mampu menyimpan data mentah dalam format aslinya, baik terstruktur, semi-terstruktur, maupun tidak terstruktur. Berbeda dengan Data Warehouse yang menerapkan skema saat menulis (schema-on-write), Data Lake menerapkan skema saat membaca (schema-on-read), menawarkan fleksibilitas maksimal untuk eksplorasi dan analisis data. ## 2. Apa perbedaan utama antara schema-on-write dan schema-on-read? **Jawaban** Schema-on-write menerapkan validasi dan transformasi data sebelum penyimpanan, memastikan struktur yang konsisten tetapi membatasi fleksibilitas. Schema-on-read menyimpan data dalam format mentah dan menerapkan skema hanya saat membaca, menawarkan fleksibilitas ingesti maksimal tetapi memerlukan pemrosesan saat mengakses data. ## 3. Apa tiga zona klasik dari Data Lake? **Jawaban** Arsitektur Data Lake standar terdiri dari tiga zona: Raw (Bronze) untuk data mentah yang belum ditransformasi, Refined (Silver) untuk data yang dibersihkan dan dinormalisasi, dan Curated (Gold) untuk data agregat yang siap dikonsumsi. Organisasi berlapis ini memfasilitasi tata kelola, keterlacakan, dan kualitas data. ## 17 pertanyaan lagi tersedia - Apa peran zona Raw (Bronze) dalam Data Lake? - Format file mana yang paling cocok untuk menyimpan data analitik besar dalam Data Lake? 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