You want to save costs by moving files older than 30 days to STANDARD_IA storage and delete files older than 365 days, but only for files in the archive/ folder. Which lifecycle rule setup achieves this?
Step 1: Identify correct keys for multiple transitions and expiration
Multiple transitions require "Transitions" array. Expiration is separate. Filter with Prefix targets 'archive/'.
Step 2: Check each option for correct days and storage class order
{
"Rules": [{
"Status": "Enabled",
"Prefix": "archive/",
"Transition": {"Days": 365, "StorageClass": "STANDARD_IA"},
"Expiration": {"Days": 30}
}]
} reverses days and expiration. {
"Rules": [{
"Status": "Enabled",
"Filter": {"Prefix": "archive/"},
"Transitions": [{"Days": 30, "StorageClass": "STANDARD_IA"}],
"Expiration": {"Days": 365}
}]
} correctly uses "Transitions" array with 30 days to STANDARD_IA and expiration at 365 days, with filter prefix. {
"Rules": [{
"Status": "Enabled",
"Filter": {"Prefix": "archive/"},
"Transition": {"Days": 365, "StorageClass": "STANDARD_IA"},
"Expiration": {"Days": 30}
}]
} uses singular "Transition" but reverses days (365 to IA, expire 30). {
"Rules": [{
"Status": "Enabled",
"Filter": {"Prefix": "archive/"},
"Transitions": [{"Days": 365, "StorageClass": "STANDARD_IA"}],
"Expiration": {"Days": 30}
}]
} reverses days and expiration.
Step 3: Choose best practice with multiple transitions
{
"Rules": [{
"Status": "Enabled",
"Filter": {"Prefix": "archive/"},
"Transitions": [{"Days": 30, "StorageClass": "STANDARD_IA"}],
"Expiration": {"Days": 365}
}]
} uses "Transitions" array which is best practice for multiple transitions, even if only one here, and matches requirements.
Final Answer:
Rule with Filter prefix 'archive/', Transitions at 30 days to STANDARD_IA, Expiration at 365 days -> Option B
Quick Check:
Multiple transitions use "Transitions" array, filter prefix set = B [OK]
Quick Trick:Use "Transitions" array for multiple moves, filter prefix to target folder [OK]
Common Mistakes:
Confusing Transition singular vs Transitions array
Mixing up days for transition and expiration
Not using filter or prefix to limit scope
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