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Dwight S.
Software Engineer with 25+ years in database Programming
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Python Programming
TutorMe
Question:

Which Python object type is 'immutable', dictionary or tuple?

Dwight S.
Answer:

Tuples are immutable. While a dictionary can be modified, it's key must be an immutable data type.

Databases
TutorMe
Question:

What is the major problem with a SQL cross join?

Dwight S.
Answer:

With large tables, the result set may take more resources than allowed or available, possibly locking the user's working area until canceled, sometimes with need of a DBA's assistance.

C Programming
TutorMe
Question:

In dealing with multiple C source files, why are function prototypes necessary?

Dwight S.
Answer:

It declares a function's parameter list, order and type, along with the function's return type for use in files other than the one it was defined in.

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