Verified Blockchain CBDE Exam Dumps for Last-Minute Exam Prep

Question No: 1

MultipleChoice

Smart Contracts can be written in:

Options

AJava, C++, Solidity and JavaScript, because the Ethereum Blockchain is completely language agnostic and cross compilers exist for every major language.

BSolidity, Viper, LLL and Serpent, because those are high level languages that are compiled down to bytecode.

CSolidity and JavaScript, because those are the official first implementations for Distributed applications and the Blockchain supports those languages fully.

Question No: 2

MultipleChoice

Checking the balance of an address inside a loop of a smart contract constantly:

Options

Adoesn't cost any gas.

Bcost gas every time we check the balance.

Question No: 3

MultipleChoice

To get most out of the blockchain, it is best:

Options

Ato use it for the whole business logic. It's always best to have everything in once place.

Bto use it only for things which need the benefits of the blockchain.

Question No: 4

MultipleChoice

A version pragma is a great way to make it clear:

Options

Afor which compiler version a smart contract was developed for. It helps to avoid breaking changes.

Bfor which blockchain a smart contract was developed for. It helps to avoid confusion with beta-customers.

Cfor which blockchain node a smart contract was developed for. It helps to avoid mixing up different versions of go-ethereum.

Question No: 5

MultipleChoice

Solidity gets compiled:

Options

Ato bytecode that can't be understood by humans.

Bto bytecodes which are essentially opcodes running instruction by instruction.

Question No: 6

MultipleChoice

Events:

Options

Aare stored on chain and are a great way to get a return value when a contract calls another contract.

Bare stored in something like a side-chain and cannot be accessed by contracts.

Care used primarily for debugging exceptions in solidity.

Question No: 7

MultipleChoice

When a new block is mined:

Options

Aa 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.

Ba 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.

Free Blockchain CBDE Exam Dumps July 2026