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这是一组关于IBM Mainframe技术的考试题目，涵盖JCL（作业控制语言）、DB2数据库、VSAM文件系统、CICS（客户信息系统）和COBOL编程语言。涉及内容包括JCL的执行步骤、DB2的查询优化、VSAM数据集类型、CICS交易处理及COBOL程序结构等。
JCL Exam
(60 Minutes)
Name: _____________ Grade: ____________
1. What is the difference between the JOBLIB and the STEPLIB statements?
The position difference.joblib adapts whole job,steplib only exec.
2. Name some of the JCL statements that are not allowed in PROCs.
Job statements,dd * statements,dd data statements,/*,null statements
3. What does a dispositions of (NEW,CATLG, KEEP) means?
4. What are three major types of JCL&nb
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