Platforms Flashcards
What is gas in Ethereum?
A unit measuring the computational effort of EVM operations, paid in gwei.
How is Ethereum transaction fee calculated?
Gas used × (base fee + priority fee).
What is the base fee in Ethereum?
A protocol-set gas price that adjusts per block and is burned.
What is a gas limit?
The maximum gas a sender authorizes for a transaction, capping compute usage.
What happens if gas limit is too low or too high?
Too low: transaction reverts but fees still paid; Too high: unused gas refunded, miners prefer smaller-limit txns.
What is a channel in Hyperledger Fabric?
A private sub-network where a subset of peers shares an isolated ledger.
How can a Fabric node join multiple channels?
A peer can subscribe to multiple channels, each with separate ledger data.
Define a state in Corda.
An immutable object representing a fact at a specific point in time.
What is a state sequence in Corda?
Process of consuming input states and creating new output states to update the ledger.
What is a vault in Corda?
A node’s database tracking all current and historic states it is aware of.
Public vs private ledgers: Ethereum vs Fabric?
Ethereum is public & permissionless; Fabric uses private, permissioned channels.
