You are working on a COBOL program that performs a merge operation on two sorted files. How can you ensure that the merge operation is efficient and optimized for performance?

  • Implementing a binary search algorithm
  • Pre-sorting the input files before merging
  • Using indexed files for both input files
  • Using the SORT verb provided by COBOL
Pre-sorting the input files before merging ensures that the records are already in sorted order, which simplifies the merge process and improves performance. This reduces the need for complex sorting algorithms during the merge operation.
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