Cache

Question 1

Which PSR does Cache-Component follow?

Answer 1

PSR-6 & PSR-16

Question 2

Which interfaces/classes does the PSR-6 Cache-Component include?

Answer 2

• CacheException
• CacheItemInterface
• CacheItemPoolInterface
• InvalidArgumentException

Question 3

How will a value be set for a cache-item?

Answer 3

Within the method “get”

Question 4

How will a value be selected for a cache-item?

Answer 4

Within the method “get”

Question 5

What is stampede protection?

Answer 5

Protecting cold cache from being written by multiple clients at a time

Question 6

What are the 2 ways of symfony’s stampede protection?

Answer 6

1. lock
2. refresh before expiring

Question 7

Whats the difference between PSR-6 and PSR-16?

Answer 7

PSR-16 is the simplified and more performant way of caching, while PSR-6 allows more complex possibilities for caching (e.g. getItem, getDeferred etc.)

Question 8

Which Interfaces / Classes do the cache-contracts (PSR-16) include?

Answer 8

• CacheInterface
• ItemInterface