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- Question
What are the differences between COBOL and COBOL II?
- Correct Answer
- There are some differences: COBOL II supports structured programming by using in line Performs and explicit scope terminators It introduces new features (EVALUATE, SET TO TRUE, CALL BY CONTEXT, etc) It permits programs to be loaded and addressed above the 16-megabyte line It does not support many old features (READY TRACE, REPORT-WRITER, ISAM, etc) It offers enhanced CICS support
- 1. What divisions, sections and paragraphs are mandatory for a COBOL program? Discuss
- 2. What COBOL construct is the COBOL II EVALUATE meant to replace? Discuss
- 3. In the JCL, how do you define the files referred to in a subroutine ? Discuss
- 4. What are the steps you go through while creating a COBOL program executable? Discuss
- 5. How do you sort in a COBOL program? Give sort file definition, sort statement syntax and meaning. Discuss
- 6. What guidelines should be followed to write a structured COBOL program ? Discuss
- 7. What is autostatus in IDMS? Discuss
- 8. How does IDMS communicate with CICS? Discuss
- 9. What is an OOK-Rec in IDMS? Discuss
- 10. Is there a application program coding difference between local and central version mode in IDMS? Discuss
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Correct Answer: IDENTIFICATION DIVISION and PROGRAM-ID paragraph are mandatory for a compilation error free COBOL program
Correct Answer: EVALUATE can be used in place of the nested IF THEN ELSE statements
Correct Answer: Supply the DD cards just as you would for files referred to in the main program
Correct Answer: DB2 precompiler (if embedded sql used), CICS translator (if CICS program), COBOL compiler, Link editor If DB2 program, create plan by binding the DBRMs
Correct Answer: Syntax: SORT file-1 ON ASCENDING/DESCENDING KEY key USING file-2 GIVING file-3 USING can be substituted by INPUT PROCEDURE IS para-1 THRU para-2 GIVING can be substituted by OUTPUT PROCEDURE IS para-1 THRU para-2 file-1 is the sort workfile and must be described using SD entry in FILE SECTION file-2 is the input file for the SORT and must be described using an FD entry in FILE SECTION and SELECT clause in FILE CONTROL file-3 is the outfile from the SORT and must be described using an FD entry in FILE SECTION and SELECT clause in FILE CONTROL file-1, file-2 & file-3 should not be opened explicitly INPUT PROCEDURE is executed before the sort and records must be RELEASEd to the sort work file from the input procedure OUTPUT PROCEDURE is executed after all records have been sorted Records from the sort work file must be RETURNed one at a time to the output procedure
Correct Answer: Following guidelines to be following while writing Cobol program: - Use ? EVALUATE ? statement for constructing cases - Use scope terminators for nesting - Use in-line Perform statement for writing ?do? constructions - Use Test Before and Test After in the Perform statement while writing Do-While statements
Correct Answer: Autostatus is a protocol mode which causes the expansion of each DML statement to include a 'perform IDMS-Status' statement
Correct Answer: They communicate via service MVS request calls
Correct Answer: An OOK-Rec is a one of a kind record set, used to get to another record set
Correct Answer: No The mode is specified via the SYSCTL DD card in the JCL
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