To answer this question, you need to have knowledge of IBM InfoSphere DataStage, which is a data integration and transformation tool.

The default DataStage cache size is 256 MB.

Option A) 256 MB - This option is correct because it represents the default DataStage cache size. Option B) 128 MB - This option is incorrect because it does not represent the default DataStage cache size. Option C) 64 MB - This option is incorrect because it does not represent the default DataStage cache size. Option D) 512 MB - This option is incorrect because it does not represent the default DataStage cache size.

The correct answer is A) 256 MB. This option is correct because it represents the default DataStage cache size.

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