When a new block is mined:

a list of transactions as well as uncles is incorporated in the block. All gas that is used during those transactions is added to the miners' balance. Also, the block reward is added to the miner. Then the same transactions are run again by every participating node in the network to achieve consensus.

a list of transactions is incorporated in that block. Gas used during the execution is attached to the executing contracts while the block reward is automatically spread across the mining pool to ensure a fair spread. Consensus is reached by a special form of hash code.

Variables of the type address store:

a 20 characters long hex number

Sending one Ether is actually internally translated:

to Wei, so it will send the equivalent of 10^18 Wei.

to Finney, so it will send the equivalent of 10^3 Finney.

to Szabo, so it will send the equivalent of 10^6 Szabo.

To send ether to a contract without a function call:

a fallback function must be declared and it must be made payable. If there is no fallback function or the fallback function is not payable it will throw an exception.

either a fallback function which is payable exists, or no fallback function at all exists.

you cannot send ether to a contract without explicitly calling a function. The fallback function can never receive ether.

Free Blockchain CBDE Exam Practice Questions & Explanations

Last updated on: Sep 1, 2026
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