Blockchain BTA Certified Blockchain Developer - Ethereum - CBDE Free Exam Questions

A. 3, because it's always rounded.

B. 2, because the decimal is truncated.

C. 2.5, because it's automatically converted into a float.

A. It is a great way to spend time on something that you get paid for. But ultimately it will just slow down the development process.

B. It helps you to find bugs, regression bugs and sometimes also helps you to understand your code from different angles.

A. is determined by the Ethereum Committee every fortnight to reflect the average amount of transaction and it cannot be influenced by the network itself.

B. increases when the time between mined blocks is below 10 seconds, while it decreases when the time is above 20 seconds.

C. increases when the time between mined blocks is below 20 seconds, while it decreases when the time is above 60 seconds.

A. you can't directly compare two strings, but one method would be to hash both strings and compare the hashes.

B. bytes32(string1) == bytes32(string2)

C. string1 == string2

D. the internal function "str_compare(str1,str2)"

A. contract MyContractB derives MyContractA {...}

B. contract MyContractA is MyContractB { ... }

C. contract MyContractA inherit (MyContractB) {...}

D. contract MyContractA extends MyContractB {...}

A. the Value can be anything, but the key cannot be another mapping, struct, integer or Boolean.

B. the Keys can be anything, but the value can't be another mapping or struct.

C. the value can be anything, but the key cannot be another mapping, struct, enum or dynamically sized array.

A. sends the gas stipend of 2300 gas and cascades exceptions.

B. sends the gas stipend of 2300 gas and returns a false on error.

C. sends all the gas along and cascades exceptions.

D. sends all the gas along and returns a false on error.