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MongoDB C100DBA Exam - Topic 1 Question 10 Discussion

What read preference should your application use if you want to read from the primary under normal circumstances but allow reads from secondaries when a primary is unavailable?
E) primaryPreferred
A) secondaryPreferred
B) Secondary
C) nearest
D) primary

MongoDB C100DBA Exam - Topic 1 Question 10 Discussion

Actual exam question for MongoDB's C100DBA exam
Question #: 10
Topic #: 1
[All C100DBA Questions]

What read preference should your application use if you want to read from the primary under normal circumstances but allow reads from secondaries when a primary is unavailable?

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Suggested Answer: E

by Mariann at May 09, 2022, 08:12 AM

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Benton
8 months ago
Hmm, I’m not so sure about that. Isn’t primaryPreferred risky?
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Craig
9 months ago
Definitely E, it makes the most sense for failover.
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Roosevelt
9 months ago
Wait, can you really read from secondaries when the primary is down?
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Cora
9 months ago
I thought it was A, secondaryPreferred?
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Elly
9 months ago
Gotta go with E, primaryPreferred is the way to go!
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Daisy
9 months ago
I'm a bit confused; I thought "nearest" was for latency optimization. Does it really allow reads from secondaries when the primary is down?
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Naomi
9 months ago
I'm not entirely sure, but "primaryPreferred" sounds familiar too. It prioritizes the primary but can fall back to secondaries, right?
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Jutta
9 months ago
I think the answer might be "secondaryPreferred" since it allows reads from secondaries when the primary is down.
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Karina
9 months ago
I remember practicing a question like this, and I think "secondaryPreferred" was the one that allowed reads from secondaries when the primary isn't available.
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Sherita
9 months ago
This is a tricky one, but I think the key is to focus on network-level attacks that try to isolate or partition the blockchain. Eclipse and Sybil attacks seem like the most relevant options here.
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Micaela
9 months ago
Okay, I've got a strategy for this. I'll eliminate the options that don't seem directly relevant, then focus on evaluating the remaining choices to select the best answer.
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