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Confluent CCDAK Exam - Topic 1 Question 46 Discussion

In Avro, adding a field to a record without default is a __ schema evolution
A) forward
B) backward
C) full
D) breaking

Confluent CCDAK Exam - Topic 1 Question 46 Discussion

Actual exam question for Confluent's CCDAK exam
Question #: 46
Topic #: 1
[All CCDAK Questions]

In Avro, adding a field to a record without default is a __ schema evolution

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Suggested Answer: A

Since Confluent 5.4.0, Avro 1.9.1 is used. Since default value was added to enum complex type , the schema resolution changed from:

(<1.9.1) if both are enums:** if the writer's symbol is not present in the reader's enum, then an error is signalled. **(>=1.9.1) if both are enums:

if the writer's symbol is not present in the reader's enum and the reader has a default value, then that value is used, otherwise an error is signalled.


by Josephine at Dec 22, 2023, 02:43 PM

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Avery
8 months ago
I thought it was full evolution, but now I'm not so sure.
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Truman
8 months ago
Nope, it's definitely forward if you add a field!
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Cherry
8 months ago
Wait, isn't it considered breaking?
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Carolann
8 months ago
Totally agree, adding without a default breaks compatibility!
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Rory
8 months ago
It's a backward schema evolution.
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Tatum
9 months ago
I’m confused about this one. I thought it was full evolution, but now I’m leaning towards breaking since it affects compatibility.
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Edelmira
9 months ago
I feel like this might be a backward schema evolution since older versions wouldn't know how to handle the new field.
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Cordell
9 months ago
I remember practicing a question about schema evolution, and I think adding a field is forward compatibility if it has a default value.
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Jess
9 months ago
I think adding a field without a default is considered a breaking change, but I'm not entirely sure.
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Josphine
9 months ago
I'm not totally confident, but I think the answer is A. Forward schema evolution. The key is that the new schema is compatible with the old one, so it's a non-breaking change.
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Shad
9 months ago
Okay, I've got this. Adding a field without a default is a forward schema evolution, because it allows the new schema to be read by older readers that don't have that field.
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Rikki
9 months ago
I'm pretty sure this is a forward schema evolution, since adding a field without a default value is considered a non-breaking change in Avro.
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Aja
9 months ago
Hmm, I'm a bit confused on this one. I know schema evolution is important in Avro, but I can't remember the exact terminology for adding a field without a default. I'll have to think this through carefully.
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Lacresha
9 months ago
This seems like a pretty straightforward question. The key is ensuring the database dumps complete before the SnapMirror update, so I'd say OnCommand Workflow Automation is the tool that can help automate that process.
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Nina
1 year ago
Adding a field without a default? Sounds like a great way to 'Avro-id' compatibility issues. *ba dum tss*
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Ellsworth
1 year ago
Wait, you mean Avro has schemas? I thought it was just a fancy way to say 'Avocado'! *scratches head*
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Tesha
1 year ago
D all the way, baby! Breaking changes are my middle name. *flexes biceps*
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Abel
1 year ago
D) breaking
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Catina
1 year ago
C) full
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Pearlene
1 year ago
B) backward
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Amie
1 year ago
A) forward
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Devorah
1 year ago
Easy peasy, it's C. Full schema evolution, right? Who needs defaults anyway, am I right? *winks*
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Leota
1 year ago
Exactly, defaults are overrated. *winks*
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Tina
1 year ago
I agree, who needs defaults anyway?
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Sabrina
1 year ago
Yes, you're right! It's C. Full schema evolution.
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Lashawna
1 year ago
Hmm, I'm not sure about this one. Might be B or D. Gotta double-check the Avro docs on schema evolution.
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Jacquelyne
1 year ago
Let's check the Avro docs to be sure.
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Judy
1 year ago
I believe it's D) breaking.
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Kelvin
1 year ago
I think it's B) backward.
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Wei
1 year ago
I think the answer is D. Adding a field without a default is definitely a breaking change in Avro schema evolution.
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Edward
1 year ago
I'm not sure, but I think it's either A) forward or C) full.
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Esteban
1 year ago
I agree with Shad, adding a field without default is a forward schema evolution.
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Shad
1 year ago
I think the answer is A) forward.
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Hubert
1 year ago
That makes sense. I agree with you.
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Dahlia
1 year ago
I believe the answer is D) breaking because adding a field without default can break compatibility with existing data.
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Hubert
1 year ago
What do you think the answer is for this question?
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