Which of the following are characteristics of NoSQL databases? Select all that apply. 1 mark is deducted for each incorrect choice.Question 2Select one or more:A.Complex query supportB.Eventual consistencyC.ACID transactionsD.Strong consistencyE.Limited horizontal scalabilityF.Horizontal scalingG.Distributed computingH.High availabilityI.Schema-free designJ.Complex joins
Question
Which of the following are characteristics of NoSQL databases? Select all that apply. 1 mark is deducted for each incorrect choice.Question 2Select one or more:A.Complex query supportB.Eventual consistencyC.ACID transactionsD.Strong consistencyE.Limited horizontal scalabilityF.Horizontal scalingG.Distributed computingH.High availabilityI.Schema-free designJ.Complex joins
Solution
The characteristics of NoSQL databases are:
B. Eventual consistency F. Horizontal scaling G. Distributed computing H. High availability I. Schema-free design
These options are correct because NoSQL databases are designed to expand horizontally, and they are best for distributed computing systems. They offer high availability and eventual consistency rather than strong consistency. They also have a schema-free design which allows unstructured and semi-structured data to be stored and processed.
However, NoSQL databases do not typically support complex queries and joins like SQL databases do. They also do not fully support ACID transactions. Lastly, NoSQL databases are not limited in terms of horizontal scalability; in fact, one of their main advantages is their ability to scale out.
Similar Questions
Which of the following is/are correct?Question 4Select one or more:Select one or more:a.Some NoSQL databases let the programmer decide the trade-off between scalability and consistency.b.Different NoSQL databases may offer different levels of transaction supports.c.There are no transactions in any NoSQL databases.d.NoSQL databases define isolation levels under the BASE model .
What is the primary disadvantage of NoSQL databases? Question 4Select one: Limited query capabilities Mature database tools and standards Strong consistency in distributed systems Ease of implementation
True or False: NoSQL databases provide greater performance at the expense of availability.Question 4Select one:TrueFalse
Which of the following best describes a NoSQL database? Question 1Select one: Non-relational and schema-free Relational and schema-free Non-relational and schema-driven Relational and schema-driven
Which of the following is/are correct?试题 10选择一项或多项：a.There are no transactions in any NoSQL databases.b.NoSQL databases define isolation levels under the BASE model .c.Different NoSQL databases may offer different levels of transaction supports.d.Some NoSQL databases let the programmer decide the trade-off between scalability and consistency.
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