Database / Weaviate Vector database Interview questions

What is replication in Weaviate?

Replication maintains multiple copies of a collection's data (or specific shards of it) across separate nodes in a cluster, so the loss of any single node doesn't make that data unavailable, and so read traffic can be distributed across more than one copy for better throughput.

client.collections.create(
    name="Products",
    replication_config=Configure.replication(factor=3)
)

A replication_config with factor=3 means each shard of data exists on three separate nodes; if one node fails, the other two still hold a complete copy and can continue serving reads (and, depending on configuration, writes) without data loss or a full outage, which is the core high-availability guarantee replication provides for a production cluster.

Take quiz

Replication in Weaviate primarily provides: Automatic vector compression

✗ Try again if not.

Fault tolerance and improved read throughput through multiple data copies

✓ Correct! Well done.

A way to define the collection's schema

✗ Try again if not.

A replication factor of 3 means: The collection is compressed to one-third its original size

✗ Try again if not.

Each shard of data exists on three separate nodes

✓ Correct! Well done.

Only one copy of the data exists anywhere in the cluster

✗ Try again if not.

More Related questions...

What is Weaviate? What is a Collection in Weaviate? What is a vectorizer module in Weaviate? What is hybrid search in Weaviate? What is the HNSW index in Weaviate? What is a Flat index in Weaviate? What is the Dynamic index in Weaviate? What is a cross-reference in Weaviate? What are named vectors in Weaviate? What is Weaviate Cloud? What is quantization/compression in Weaviate, and why is it used? What is Rotational Quantization (RQ) in Weaviate? What is generative search (RAG) in Weaviate? What is multi-tenancy in Weaviate? What is Object TTL in Weaviate? What is the Weaviate Query Agent? What is a UUID's role for objects in Weaviate? What are properties in a Weaviate collection? What is BM25 in the context of Weaviate? What is the alpha parameter in Weaviate hybrid search? What are the main deployment options for Weaviate? What is replication in Weaviate? What is sharding in Weaviate? What are the main use cases for Weaviate? What is the difference between bringing your own vectors and using a vectorizer module? Explain the data flow of an object being vectorized and indexed in Weaviate? Why does Weaviate combine BM25 and vector search instead of using vector search alone? How does Weaviate differ from Milvus? What is the difference between HNSW and the HFresh index in Weaviate? How do you choose between PQ, BQ, SQ, and RQ quantization? When should you use the Dynamic index instead of always using HNSW? How do you troubleshoot poor recall after enabling quantization in Weaviate? What is the difference between rescoring and raw compressed-vector search? How does Weaviate's multi-tenancy isolate tenant data on disk? Explain the internal working of Weaviate's rescoring mechanism for quantized vectors? What is the difference between Weaviate and Pinecone? How do you implement RAG using Weaviate's generative search module? Why use cross-references sparingly, according to Weaviate's own guidance? What is the difference between rankedFusion and relativeScoreFusion in hybrid search? How does the Weaviate Query Agent route natural-language questions across collections? When would you choose multi-vector (ColBERT-style) embeddings over single-vector embeddings? How do you configure replication factor for high availability in Weaviate? What is the difference between Weaviate's REST/GraphQL API and its gRPC API? Explain the lifecycle of a hybrid search query in Weaviate? How do you optimize Weaviate for memory efficiency at large scale? What is the difference between PQ and RQ quantization internally? How does Weaviate decide which shard(s) to query for a given request? Why should you avoid excessive cross-reference traversal in a single query? What is the difference between Weaviate Database (self-hosted) and Weaviate Cloud? How do you troubleshoot a Weaviate collection running out of memory at scale?

Show more question and Answers...

Milvus Vector database Interview questions

Comments & Discussions

SQL 39 MongoDB Interview questions 31 REDIS 69 Apache Cassandra Interview Questions 27 Amazon DynamoDB Interview questions 6 InfluxDb interview questions 30 InfluxDb interview questions II 50 Vector database interview questions 45 PineCone Database Interview questions 50 PineCone Database Interview questions II 5 Snowflake Interview Questions 45 CouchDB Interview Questions 45 Liquibase interview questions 34 Azure Cosmos DB interview questions 34 ChromaDB Interview Questions 38 pgvector basics Interview Questions 40 Supabase basics Interview Questions 30 Supabase Intermediate to Advanced Interview Questions 40 Apache Cassandra Intermediate and Advanced interview questions 45 RocksDB Basics Interview Questions 47 Mnesia basics Interview questions 48 Mnesia intermediate to advanced Interview questions 48 SQLite Interview questions 48 Google Spanner Database Interview questions 50 ScyllaDB Interview questions 50 Qdrant Vector DB Interview questions 50 Weaviate Vector database Interview questions 50 Milvus Vector database Interview questions 50

Recently added questions

What is Milvus Lite? What is a scalar field in Milvus, and how is it used with vector search? What is an index in Milvus, and why is it needed? What is the difference between L2 and Cosine similarity in Milvus? What is the Proxy component in Milvus? What is loading a collection in Milvus, and why is it required before search? What is a Collection in Milvus? What is an embedding vector, in the context of Milvus? What is HNSW, and why is it commonly used in Milvus? What are the similarity/distance metrics Milvus supports? What is Zilliz Cloud? What are the main components of Milvus's architecture? What is a Query Node in Milvus? What is a Data Node in Milvus? What is Milvus? What is a vector database, and how does Milvus fit that category? What is a Partition in Milvus? What is a Segment in Milvus? What are the main vector index types Milvus supports? What is dynamic schema in Milvus?

	Interviews Questions Java Spring Hibernate DevOps Testing API BigData Web Erlang AI Database Integration Cloud Python Scala Tools Golang SAP	About Javapedia.net Javapedia.net is for Java and J2EE developers, technologist and college students who prepare of interview. Also this site includes many practical examples. This site is developed using J2EE technologies by Steve Antony, a senior Developer/lead at one of the logistics based company. Follow Javapedia updates
	contact: javatutorials2016[at]gmail[dot]com
Kindly consider donating for maintaining this website. Thanks.
	Copyright © 2026, javapedia.net, all rights reserved. Privacy Policy · Terms of Service.