Free CBDE Questions for Blockchain BTA Certified Blockchain Developer - Ethereum CBDE Exam as PDF & Practice Test Engine

Exam Code/Number: CBDE
Exam Name/Title: BTA Certified Blockchain Developer - Ethereum
Certification Provider: Blockchain
Corresponding Certification: Blockchain Developer - Ethereum

Exam Questions: 102
Updated On: Jun 13, 2026

Question #1

When using assert to check invariants and it evaluates to false:

A. all gas is consumed.

B. all remaining gas is returned.

Discussion 0

Correct Answer: A Vote an answer

Question #2

Block Timestamp:

A. the timestamp is based on the time zone of the miner, that is why it changes the difficulty continuously to reflect network latency.

B. the timestamp can't be influenced by a miner and is generally considered safe to be used for randomness on the blockchain.

C. the timestamp can be influenced by a miner to a certain degree but it's always independent from the time-zone.

Discussion 0

Correct Answer: C Vote an answer

Question #3

.Require is used:

A. to check input arguments from users.

B. to check internal states that should never happen.

Discussion 0

Correct Answer: A Vote an answer

Question #4

A Struct is a great way:

A. to hold instances of other contracts.

B. to define a new datatype in Solidity, so you don't need to use objects of another contract.

C. to implement pointers to other contracts that can hold new datatypes.

Discussion 0

Correct Answer: B Vote an answer

Question #5

Solidity gets compiled:

A. to bytecode that can't be understood by humans.

B. to bytecodes which are essentially opcodes running instruction by instruction.

Discussion 0

Correct Answer: B Vote an answer

Question #6

EVM assembly:

A. can be split across multiple files, but every contract must be in a file with the same name as the contract itself.

B. is another language similar to LLL, more secure than Solidity.

C. is much better than Solidity and a viable alternative.

Discussion 0

Correct Answer: A Vote an answer

Question #7

Truffle boxes are a great way:

A. to use tools that makes boxing of Dapps for different platforms very easy.

B. to start with a pre-configured environment for most web-development needs.

C. to contribute to the box community which is the distributed file system for truffle.

Discussion 0

Correct Answer: B Vote an answer

Question #8

Inheritance is useful, because a contract that is derived from another contract can make use of:

A. all public and private state variables, public, internal and external functions, but not modifiers

B. all public state variables and properties, public and internal functions and modifiers.

C. all public state variables and properties, public functions and modifiers, but not internal, external or private ones.

Discussion 0

Correct Answer: B Vote an answer

Question #9

Assert is used:

A. to check input arguments from users.

B. to check internal states that should never happen.

Discussion 0

Correct Answer: B Vote an answer

Free CBDE Questions for Blockchain BTA Certified Blockchain Developer - Ethereum CBDE Exam as PDF & Practice Test Engine

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