What is the correct storage size for the Decimal (System.Decimal) data type in C#.NET? Select the best answer in bytes.
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A8 Bytes
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B4 Bytes
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C10 Bytes
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D16 Bytes
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ENone of the above.
Answer
Correct Answer: 16 Bytes
Explanation
Introduction / Context:Decimal is the preferred numeric type for financial calculations due to its base-10 precision. This question asks for its exact size in memory.
Given Data / Assumptions:
- We are concerned with the fixed size of System.Decimal as defined by the CLR.
Concept / Approach:System.Decimal is a 128-bit type, which equals 16 bytes. It stores a 96-bit integer plus a scaling factor (number of decimal digits) and a sign, enabling precise decimal arithmetic without many of the rounding artifacts found in binary floating-point types.
Step-by-Step Solution:
Recall: 128 bits / 8 = 16 bytes.Match with the list of possible sizes → 16 Bytes.Verification / Alternative check:Use sizeof(decimal) (unsafe) or consult official documentation referencing Decimal's 128-bit layout.
Why Other Options Are Wrong:They correspond to sizes of other primitives (Single 4 bytes, Double 8 bytes) or arbitrary distractors.
Common Pitfalls:Confusing Decimal with Double since both represent fractional numbers; Decimal is larger and decimal-based.
Final Answer:16 Bytes