40087902
Description
Quiz by Eladio Rocha, updated 11 months ago
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Created by Eladio Rocha
11 months ago
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Question 1
Question
What aspect of the CAP theorem does MongoDB trade off?
Answer
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Consistency
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Availability
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Partition tolerance
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Scalability
Question 2
Question
Why does MongoDB experience a brief period of downtime during server failure?
Answer
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The entire database must reboot.
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Data replication halts temporarily.
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The system must detect the outage and elect a new primary host.
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Config servers need to reinitialize.
Question 3
Question
Which part of the CAP theorem does Cassandra sacrifice?
Answer
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Consistency
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Availability
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Partition tolerance
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Fault tolerance
Question 4
Question
Why is Cassandra highly available?
Answer
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It replicates data across all nodes in real time.
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It avoids having a single master node.
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It requires all nodes to stay online simultaneously.
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It partitions data only when a node fails.
Question 5
Question
When designing a database system, what is a critical first step in choosing a database technology?
Answer
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Picking the most popular database solution.
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Ensuring consistency at all costs.
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Understanding the system’s specific requirements.
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Using a database that maximizes partition tolerance.
Question 6
Question
In what scenario is it acceptable to choose a database that sacrifices availability?
Answer
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When downtime longer than a few minutes is acceptable.
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When the system requires eventual consistency.
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When a few seconds of downtime is acceptable.
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When the system does not need to scale horizontally.
Question 7
Question
Which database technologies are examples of solutions that balance CAP trade-offs effectively for general-purpose use?
Answer
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Cassandra and PostgreSQL
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MongoDB and DynamoDB
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Oracle and SQLite
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Redis and MySQL
Question 8
Question
Why is it important to discuss database trade-offs in system design interviews?
Answer
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It shows familiarity with coding techniques.
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It demonstrates an understanding of scalability tools.
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It highlights an ability to make informed technical decisions.
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It ensures the interviewer agrees with your database choice.
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