Which of the following is true?
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Mapping parameters have a constant value through out the session.
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In mapping parameters, values change and the Informatica server saves the values in the repository and uses next time when you run the session.
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Mapping parameters cannot be used in any expressions within transformations.
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Value of mapping parameter can be changed using functions.
Mapping parameters have a constant value that does not change throughout the entire session execution. This is their defining characteristic - they are set before the session runs and remain fixed. Option B describes mapping variables (not parameters), option C is false (parameters can be used in expressions), and option D is false (parameter values cannot be changed using functions during session runtime).