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- Question
How do you sort in a COBOL program? Give sort file definition, sort statement syntax and meaning.
- 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
- 1. What are different file OPEN modes available in COBOL? Discuss
- 2. How do you define a sort file in JCL that runs the COBOL program? Discuss
- 3. Specify the CICS command used to read a VSAM record starting with prefix F. Code all the relevant options? Discuss
- 4. The EIB field which gives the last CICS command executed is? Discuss
- 5. What CICS command do you need to obtain the user logon-id? Discuss
- 6. What are the steps you go through while creating a COBOL program executable? Discuss
- 7. In the JCL, how do you define the files referred to in a subroutine ? Discuss
- 8. What COBOL construct is the COBOL II EVALUATE meant to replace? Discuss
- 9. What divisions, sections and paragraphs are mandatory for a COBOL program? Discuss
- 10. What are the differences between COBOL and COBOL II? Discuss
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Correct Answer: Open for INPUT, OUTPUT, I-O, EXTEND 1INPUT : for read only purpose 2OUTPUT : for write only purpose 3EXTEND : for appending records 4I-O : for read and write(using EXTEND) purpose
Correct Answer: Use the SORTWK01, SORTWK02, dd names in the step Number of sort datasets depends on the volume of data being sorted, but a minimum of 3 is required
Correct Answer: EXEC CICS READ DATASET('FILENAME') INTO(data-area) RIDFLD(data-area) KEYLENGTH(1) GENERIC LENGTH(WK-LEN) END-EXEC
Correct Answer: EIBRCODE
Correct Answer: You must code EXEC CICS ASSIGN with the OPENID option
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: Supply the DD cards just as you would for files referred to in the main program
Correct Answer: EVALUATE can be used in place of the nested IF THEN ELSE statements
Correct Answer: IDENTIFICATION DIVISION and PROGRAM-ID paragraph are mandatory for a compilation error free COBOL program
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
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