Blockchain Developer Certification Practice

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Prepare for the Blockchain Developer Certification. Master blockchain concepts with flashcards and multiple choice questions. Explanation-based learning for your success!

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What type of data does the basic type 'uint' represent in Solidity?

Signed integers with decimals
Unsigned integers without decimals
Strings
Boolean values

The correct answer is: Unsigned integers without decimals

In Solidity, the basic type 'uint' represents unsigned integers without decimals. This means it can only represent whole numbers and cannot be negative, which distinguishes it from signed integers. The prefix 'u' in 'uint' stands for "unsigned," indicating that the data type only allows for non-negative values. This is particularly useful in programming contexts where you need to ensure values remain positive, such as counting tokens or representing quantities where negatives would not make sense. The lack of decimals also means that 'uint' is not suitable for representing fractional values, making it a straightforward and efficient choice for integer arithmetic in smart contracts. This clarity in usage is why 'uint' is one of the most commonly used data types in Solidity programming.