Mainframe 面试题与答案
问题 6. Explain the concept of partitioned datasets in mainframes.
Partitioned datasets (PDS) are file structures in mainframes that store data in separate members or partitions.
Example:
JCL for PDS: //DDNAME DD DSN=MY.PDS,DISP=SHR
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问题 7. What is the purpose of IDCAMS utility in mainframes?
IDCAMS is a utility in mainframes used for defining and managing VSAM datasets.
Example:
IDCAMS command: IDCAMS DEFINE CLUSTER ...
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问题 8. Explain the concept of a mainframe 'region'.
A mainframe region is a logical partition where programs and data are executed and managed independently.
Example:
region definition in JCL: //REGION1 EXEC PGM=PROGRAM1,REGION=4M
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问题 9. What is the purpose of the IEBGENER utility in mainframes?
IEBGENER is a utility used for copying or generating datasets in mainframes.
Example:
IEBGENER JCL: //SYSIN DD * GENERATE MAXCC=0 /*
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问题 10. Explain the function of the DFSORT utility in mainframes.
DFSORT is a utility used for sorting, merging, and copying datasets in mainframes.
Example:
DFSORT JCL: //SORTSTEP EXEC PGM=DFSORT...
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