Podcast
Questions and Answers
What is a common approach in NoSQL databases when retrieving data?
What is a common approach in NoSQL databases when retrieving data?
- Using several queries to get the desired data (correct)
- Only doing one query regardless of the data needed
- Retrieving all the data with one query
- Using complex nested queries for data retrieval
In NoSQL databases, what is a consideration for storing foreign values?
In NoSQL databases, what is a consideration for storing foreign values?
- Storing foreign values as separate documents
- Storing foreign values separately in a different database
- Storing only foreign keys for efficiency
- Storing actual foreign values along with the model's data (correct)
In document databases like MongoDB, where are comments often stored in relation to blog posts?
In document databases like MongoDB, where are comments often stored in relation to blog posts?
- Within the blog post document (correct)
- In a separate collection linked by a foreign key
- As separate documents linked by a unique identifier
- In a completely separate database
How is a database marked as supporting ACID properties or join operations?
How is a database marked as supporting ACID properties or join operations?
What does it mean if a database supports ACID properties and join operations?
What does it mean if a database supports ACID properties and join operations?
What approach works better when reads are much more common than writes in a NoSQL database?
What approach works better when reads are much more common than writes in a NoSQL database?
What is the primary consideration for storing foreign values in NoSQL databases?
What is the primary consideration for storing foreign values in NoSQL databases?
What does NoSQL stand for originally?
What does NoSQL stand for originally?
What is a characteristic of retrieving data from document databases like MongoDB?
What is a characteristic of retrieving data from document databases like MongoDB?
What is a key feature of NoSQL databases?
What is a key feature of NoSQL databases?
Why was the term 'NoSQL' coined in the early 21st century?
Why was the term 'NoSQL' coined in the early 21st century?
What differentiates the data structures used by NoSQL databases from those used in relational databases?
What differentiates the data structures used by NoSQL databases from those used in relational databases?
What do most NoSQL stores prioritize over consistency?
What do most NoSQL stores prioritize over consistency?
What are some barriers to NoSQL adoption mentioned in the text?
What are some barriers to NoSQL adoption mentioned in the text?
What is a characteristic of NoSQL databases' transactions?
What is a characteristic of NoSQL databases' transactions?
When did the general concept of 'NoSQL' emerge?
When did the general concept of 'NoSQL' emerge?
How are key-value stores defined in the text?
How are key-value stores defined in the text?
'Graph databases' are designed for representing what type of data?
'Graph databases' are designed for representing what type of data?
How are document stores described in the text?
How are document stores described in the text?
What is a common evaluation criteria for NoSQL databases mentioned in the text?
What is a common evaluation criteria for NoSQL databases mentioned in the text?
What is a challenge mentioned for both NoSQL and relational databases in distributed transaction processing?
What is a challenge mentioned for both NoSQL and relational databases in distributed transaction processing?
What is mentioned as helping prevent potential data loss in some NoSQL systems?
What is mentioned as helping prevent potential data loss in some NoSQL systems?
Study Notes
Overview of NoSQL Databases
- NoSQL databases are chosen based on the problem they solve and are seen as more flexible than relational databases.
- Most NoSQL stores prioritize availability, partition tolerance, and speed over consistency.
- Barriers to NoSQL adoption include low-level query languages, lack of standardized interfaces, and existing investments in relational databases.
- NoSQL databases generally lack true ACID transactions but offer eventual consistency.
- Some NoSQL systems may experience data loss, but concepts like write-ahead logging help prevent it.
- Data consistency is a challenge for both NoSQL and relational databases in distributed transaction processing.
- The term "NoSQL" was coined in 1998, but the general concept emerged around 2009 with the rise of non-relational, distributed data stores.
- NoSQL databases can be classified into types like key-value stores, document stores, and graph databases.
- Key-value stores use the associative array as their fundamental data model and support various consistency models.
- Document stores encapsulate data in standard formats and use unique keys to address documents in the database.
- Graph databases are designed for data represented as a graph with finite relations, such as social relations or network topologies.
- NoSQL databases are evaluated based on throughput and commonly benchmarked using the YCSB benchmark.
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Description
Test your knowledge of NoSQL databases with this quiz that covers the principles and features of non-relational database design, including rapid scalability and schema-less structure.
