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You have two arrays: one with dtype int32 and another with dtype complex64. You want to multiply them and keep the highest precision possible. Which dtype will the result have?

hard📝 Application Q8 of 15
NumPy - Array Operations
You have two arrays: one with dtype int32 and another with dtype complex64. You want to multiply them and keep the highest precision possible. Which dtype will the result have?
Acomplex128
Bcomplex64
Cfloat64
Dint32
Step-by-Step Solution
Solution:

  1. Step 1: Identify input dtypes

    One array is int32, the other is complex64.

  2. Step 2: Understand promotion with complex types

    int32 promotes to complex64 when combined with complex64.

  3. Step 3: Confirm highest precision

    complex64 is the highest precision type here, so result dtype is complex64.

  4. Final Answer:

    complex64 -> Option B

  5. Quick Check:

    int32 * complex64 = complex64 [OK]
Quick Trick: Int promotes to complex type when combined with complex [OK]
Common Mistakes:
  • Assuming promotion to complex128
  • Expecting float64 result
  • Ignoring complex promotion rules

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