Free CBSA Practice Test Questions and Answers (2026) | Cert Empire Practice Questions

ERC stands for Ethereum Request for Comments. This is an official protocol for proposing

improvements to the Ethereum network. '20’ is the unique proposal ID number.

Difficulty and Timestamp block also contains two very important parameters: a difficulty and a

timestamp. The difficulty regulates how hard it is to find a block by the miner. The mining time is set

to be between 10 and 20 seconds. If it’s beyond 20 seconds, the difficulty is too high and will be

automatically lowered going forward. If the mining happens below 10 seconds, then the difficulty

increases. The timestamp is the time when a miner found the block. It is not automatically derived,

rather it is set by the miner itself and can thus be influenced to a certain degree. The timestamp does

not depend on the time zone, as it’s the standard Unix timestamp.

hyperledger is an open source collaborative effort created to advance cross-industry blockchain

technologies. It is a global collaboration, hosted by The Linux Foundation, including leaders in

finance, banking, Internet of Things, supply chains, manufacturing and Technology.

Turing Complete – A language which lets developers solve any class of problem in existence given

infinite time and resources Vs Turing Incomplete – Can’t solve all types of problems, such as

problems with loops and iterations (Bitcoin)

ASICS are generally used in blockchains such as BTC that have a Proof of Work consensus due to

competition

The ledger system in Hyperledger fabric uses levelDB. By definition, LevelDB allows concurrent

writers to safely insert data into the database by providing internal synchronization. LevelDB uses

very coarse-grained synchronization which forces all writes to proceed in an ordered, first-come-first-

served basis, effectively reduces throughput to a single thread. State database options include

LevelDB and CouchDB. LevelDB is the default key-value state database embedded in the peer

process. CouchDB is an optional alternative external state database. Like the LevelDB key-value store,

CouchDB can store any binary data that is modeled in chaincode (CouchDB attachment functionality

is used internally for non-JSON binary data). But as a JSON document store, CouchDB additionally

enables rich query against the chaincode data, when chaincode values (e.g. assets) are modeled as

JSON data.