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Why does converting a numeric array with int8() sometimes produce unexpected negative values?

hard📝 Conceptual Q10 of 15
MATLAB - Cell Arrays and Structures
Why does converting a numeric array with int8() sometimes produce unexpected negative values?
ABecause int8 stores values using 8-bit signed integers causing overflow wrap
BBecause int8 converts numbers to strings first
CBecause int8 only accepts positive numbers
DBecause int8 rounds numbers to nearest integer
Step-by-Step Solution
Solution:
  1. Step 1: Understand int8 storage

    int8 stores numbers in 8-bit signed format, range -128 to 127.
  2. Step 2: Explain overflow behavior

    Values outside this range wrap around using two's complement, causing unexpected negative values.
  3. Final Answer:

    Because int8 stores values using 8-bit signed integers causing overflow wrap -> Option A
  4. Quick Check:

    int8 overflow causes negative wrap [OK]
Quick Trick: int8 overflow wraps values causing negatives [OK]
Common Mistakes:
  • Thinking int8 converts to string
  • Believing int8 only accepts positives
  • Confusing rounding with overflow

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