Intermediate
System Design
Q47 / 100
What is the difference between "write-through" and "write-back" (write-behind) caching strategies?
Correct! Well done.
Incorrect.
The correct answer is A) Write-through writes to the cache and the underlying store synchronously; write-back writes to the cache first and updates the underlying store later, asynchronously
A
Correct Answer
Write-through writes to the cache and the underlying store synchronously; write-back writes to the cache first and updates the underlying store later, asynchronously
Explanation
Write-through ensures consistency at the cost of higher write latency; write-back improves write performance but risks data loss if the cache fails before the data is persisted.
Progress
47/100