How will you tune the Parallelism of a given job? a. Through the configuration file b. Running specific stages sequentially or on selected node pool(s) c. Changing the partition mode

In DataStage, parallelism can be tuned through multiple methods: the configuration file (apt file) specifies node resources, running stages sequentially or on specific node pools controls execution flow, and changing partition mode affects data distribution across nodes. All three approaches are valid ways to manage job parallelism.