Integrate Caching and Content Delivery within Solutions

Question 1

If using a LRU cache, and the LRU keys have expiry set.

What eviction policy should you use for the maxmemory-policy directive?

Answer 1

Volatile-lru

Question 2

Which Eviction policies behave like noeviction if there are no keys to evict matching their prerequisites?

Answer 2

volatile-lru, volatile-random and volatile-ttl

Question 3

Which policy is more memory efficient?

allkeys-lru or volatile-lru?

Answer 3

Allkeys-lru is more memory efficient since there is no need to set an expire for the key to be evicted under memory pressure.

Question 4

What’s the difference between allkeys-lru and volatile-lru?

Answer 4

Volatile will remove the less recently used keys, but only among the ones that have an expire set, allkeys-lru will not worry about expiry

Question 5

What’s the difference between volatile-lru and volatile-ttl?

Answer 5

Both will evict keys with their expire set, but volatile-ttl will try to evict keys with a shorter time to live first.

Question 6

What’s the powershell cmdlet to set the redis cache?

Answer 6

Set-AzRedisCache

Question 7

Which caching provides better scalability? Private or shared?

Answer 7

Shared provides better scalability. Caching is provided by a dedicated service that runs on a cluster of servers.
Adjusting the number of clusters provides better scalability than scaling the scaling caching store on the machine of each application instance

Question 8

Whats the difference between shared and private caching?

Answer 8

Shared caching uses distributed caching that is held in a seperate caching location vs private caching is held locally to each application instance.

Question 9

Which is faster Shared or Private caching?

Answer 9

Private caching is faster due to be held closer to the application instance

Question 10

What sort of cache would you use for a database cache?

Answer 10

Data Cache

Question 11

If you were to replace the shopping cart that was previously stored in a cookie what sort of cache would you replace it with?
And what would use as the key?

Answer 11

Session store, and pass the cookie as key to query the cache

Question 12

What cache should be used to small static assets in a website?

Answer 12

Content Cache

Question 13

Which service Tiers of Redis Cache would you use for dev/test?

• Basic
• Standard
• Premium
• Enterprise

Answer 13

Basic

Question 14

Which Redis service tier would you use if you wanted to use RedisTimeSeries?

• Basic
• Standard
• Premium
• Enterprise

Answer 14

Enterprise