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When reading and modifying the ledger state in Hyperledger Fabric, what type of schema does the data stored in the ledger need to adhere if the state database is LevelDB?
Suggested Answer: A
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When using LevelDB as the state database in Hyperledger Fabric, there is no specific schema that the data stored in the ledger needs to adhere to. LevelDB is a key-value store, which does not enforce any schema on the data it holds. This flexibility allows applications to define their own formats and structures for the data they store, which can vary from simple strings and numbers to more complex serialized data structures. This schema-less nature of LevelDB enables developers to implement the data handling that best suits their application's needs without the constraints of a predefined database schema.
42 comments · newest first
MA
Major
11 months ago
Definitely no schema needed, that's the beauty of it!
BE
Benedict
11 months ago
I thought LevelDB had some requirements...
GA
Galen
12 months ago
Wait, are you sure? I thought it needed a JSON schema.
FR
Francisca
12 months ago
Totally agree, it's flexible like that.
VI
Viva
1 year ago
No specific schema is required!
KA
Kanisha
1 year ago
I practiced a similar question, and I think it was emphasized that no specific schema is needed for LevelDB. So, A sounds right to me.
KI
Kimbery
1 year ago
I vaguely recall something about schemas, but I can't remember if XML or CSV was mentioned. This is tricky!
KA
Karima
1 year ago
I'm not entirely sure, but I feel like we discussed JSON schema in relation to Hyperledger Fabric. Could it be B?
KA
Kati
1 year ago
I think I remember that LevelDB doesn't require a specific schema, so maybe it's A?
AN
Angelyn
1 year ago
I'm leaning towards A. Since LevelDB is a key-value store, it might not require a specific schema at all, and the data could be stored in any format as long as it can be mapped to keys and values. I'll double-check the Hyperledger Fabric documentation to be sure, but that's my initial thought.
ST
Stefania
1 year ago
Okay, let me break this down. LevelDB is a key-value store, so the data doesn't need to adhere to a strict schema like a relational database. But it still needs some kind of structure, and JSON seems like the most likely option since it's widely used with NoSQL databases. I'll go with B.
GE
Gerry
1 year ago
Hmm, I'm a bit confused on this one. I know LevelDB is a NoSQL database, but I'm not sure if that means there's no specific schema required. I'll have to think this through a bit more.
NA
Nan
1 year ago
I'm pretty sure the answer is B. JSON schema, since LevelDB is a key-value store and JSON is a common format for storing data in that type of database.
DA
Daron
1 year ago
Okay, the question is asking about the full-width 4-socket server node of the Huawei E9000 blade server. I'm not too familiar with Huawei server models, so I'll have to make an educated guess here.
JA
Janae
2 years ago
I bet the correct answer is 'All of the above', because blockchain is just a fancy word for 'Throw everything at the wall and see what sticks'.
IV
Ivory
2 years ago
D) CSV schema
CA
Caitlin
2 years ago
C) XML schema
KR
Krissy
2 years ago
B) JSON schema
NA
Nancey
2 years ago
A) No specific schema is required
RO
Rosamond
2 years ago
XML schema? Are we developing websites or blockchains here?
TA
Talia
2 years ago
C) XML schema
SA
Sarina
2 years ago
B) JSON schema
ST
Stephane
2 years ago
A) No specific schema is required
KI
Kirk
2 years ago
C) XML schema
AL
Alpha
2 years ago
B) JSON schema
HO
Howard
2 years ago
A) No specific schema is required
FR
Frederica
2 years ago
I'm not sure, but I think no specific schema is required for the ledger state in Hyperledger Fabric.
CO
Coral
2 years ago
No schema? That's like building a house without a blueprint. Not a chance.
JO
Jose
2 years ago
B) JSON schema
DA
Dalene
2 years ago
No schema? That's like building a house without a blueprint. Not a chance.
VA
Vallie
2 years ago
A) No specific schema is required
AR
Armanda
2 years ago
I agree with Ranee, JSON schema makes sense for LevelDB in Hyperledger Fabric.
KI
Kip
2 years ago
CSV schema? What is this, the 90s? LevelDB is built for JSON all the way!
CA
Casie
2 years ago
Hmm, I thought Hyperledger Fabric was more flexible than that. Guess I'll have to brush up on my blockchain trivia.
MA
Markus
2 years ago
D) CSV schema
LE
Leonida
2 years ago
C) XML schema
QU
Quiana
2 years ago
B) JSON schema
LO
Lorita
2 years ago
A) No specific schema is required
MA
Madelyn
2 years ago
I'm pretty sure it's JSON schema, that's the go-to for most blockchain platforms.
KA
Katina
2 years ago
B) JSON schema
DE
Desire
2 years ago
A) No specific schema is required
RA
Ranee
2 years ago
I think the data stored in the ledger needs to adhere to a JSON schema.