40088079
Description
Quiz by Eladio Rocha, updated more than 1 year ago
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Created by Eladio Rocha
almost 2 years ago
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Question 1
Question
What is a primary reason for using a caching layer in a high-performance system?
Answer
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To simplify database schema design.
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To reduce the frequency of accessing the database disk.
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To improve write throughput of the database.
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To avoid using load balancers.
Question 2
Question
Why is a horizontally distributed caching layer advantageous?
Answer
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It eliminates the need for a database.
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It allows the caching layer to be scaled independently of the application servers.
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It enables better enforcement of database constraints.
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It reduces the number of application servers needed.
Question 3
Question
What role does a hash function play in a distributed caching system?
Answer
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It ensures consistent cache invalidation.
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It determines which cache server stores specific data.
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It manages the redundancy of cache servers.
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It calculates the expiration time for cached data.
Question 4
Question
What type of caching architecture keeps the cache local to application servers?
Answer
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Independent caching fleet.
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Integrated caching within application servers.
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Hybrid caching model.
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Disk-based caching system.
Question 5
Question
What is the "celebrity problem" in caching?
Answer
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Difficulty in caching data for infrequently accessed keys.
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High traffic to specific cached data causing uneven load distribution.
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Inability to cache frequently updated information.
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Issues with redundancy in cached data.
Question 6
Question
What is a significant concern when dealing with a cold-start cache problem?
Answer
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Cache data not invalidating properly.
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High initial traffic hitting the database until the cache is warmed up.
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Inability to scale the cache horizontally.
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Expired cache entries causing stale data.
Question 7
Question
Why is setting an appropriate expiration policy for cached data important?
Answer
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To ensure the database schema remains consistent.
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To balance between data freshness and cache effectiveness.
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To allow caching of frequently updated data.
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To reduce the need for redundancy in the cache.
Question 8
Question
What type of applications benefit the most from caching?
Answer
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Applications with frequent write operations.
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Applications with a high read-to-write ratio.
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Applications requiring real-time data consistency.
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Applications with low user traffic.
Question 9
Question
What is one approach to mitigate the cold-start problem in caching?
Answer
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Using a write-through caching strategy.
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Preloading the cache with historical data or simulated traffic before deployment.
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Shortening the cache expiration time.
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Disabling caching temporarily.
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