CBDE Exam Dumps - BTA Certified Blockchain Developer - Ethereum

you should follow the checks-effects-interactions pattern and avoid state changes after the call.

you should follow the effects-checks-interactions pattern and avoid state changes before the call.

you should follow the checks-effects-interactions pattern, which is only necessary when you do calls to contracts where a direct contract call is not possible.

works across all compilers and platforms the same way.

is generally possible, but currently works only in Remix, but doesn't work in Truffle.

can never become a mining node.

can always become a mining node.

can become a mining node, depending if the implementation has the functionality implemented.

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

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

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

by the miner nodes which make sure that a transaction is valid.

by every single node in the blockchain network executing the same transaction.

by a cryptographic secure signature algorithm called ECDSA which makes sure that cheating is impossible.