AZ104-Q: Storage redundancy choice
Q: You need the highest durability for blob data that must survive the loss of an entire Azure region, with geo-replication to a paired region. Which redundancy tier?
- A) LRS
- B) ZRS
- C) GRS ✓
- D) SSDs
Answer: C — GRS (Geo-Redundant Storage). GRS replicates to a second region (region-pair), surviving whole-region loss. LRS = 3 copies in one storage unit; ZRS = 3 copies across availability zones in one region. If you need geo survivability, choose GRS or GZRS (GZRS adds zone redundancy within both regions). For geo + zone survival: GZRS.
Why it helps
LRS→ZRS→GRS→GZRS is a guaranteed AZ-104 redundancy question: map each to what failure it survives.