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| AS400 Interview questions - Part 3 |
Q1: What is the maximum length of a variable name in the CL program?
Answer:
- 11
Q2: How can we display data from a flat-file?
Answer:
- RUNQRY
- DSPPFM
Q3: Difference between READC and SFLNXTCHG?
Answer:
- READC for reading a changed record only once.
- SFLNXTCHG was used with READC to read changed records multiple times.
Q4: Difference between ITER and DO?
Answer:
- ITER is a branching statement and control jump to ENDDO.
- DO is a looping statement.
Q5: Difference between RENAME and PREFIX?
Answer:
- RENAME is used to rename the record format in the RPG program.
- PREFIX is used to rename file fields in the RPG program.
Q6: How to debug a job that is in MSGW state?
Answer:
- STRSRVJOB and then STRDBG.
Q7: How do you pass parameters in CL program?
Answer:
- PARM keyword
Q8: What is a spool file?
Answer:
- Printed output placed at OUTQ.
Q9: What does EXFMT do?
Answer:
- WRITE then READ.
Q10: What is the default data type of DS subfields in RPGLE?
Answer:
- Zoned
Q11: What is the default data type for decimal 0 in PF?
Answer:
- Packed
Q12: What is the difference between PACKED and ZONED decimal?
Answer:
- Packed - 1 digit - 1 byte
- Zoned - 1 digit - 2 byte
Q13: What is the difference between DOW and DOU loop?
Answer:
- DOW loop executes only when the condition is TRUE.
- DOU loop executed at least once even if the condition is FALSE.
Q14: How do you read a DSPF and Database file in CL program?
Answer:
- RCVF command
Q15: How do you declare more than one file in CL program?
Answer:
- Using DCLF and OPNID (open identifier)
Q16: How do you declare a file with graphic fields in CL program?
Answer:
- ALWGRAPHIC(*YES) with DCLF command
Q17: Why do we use %SST in CL program?
Answer:
- To extract data from a string.
Q18: What is the difference between SFLPAG and SFLSIZ?
Answer:
- SFLPAG is the number of records displayed on a Subfile screen at a time.
- SFLSIZ is the total number of records that can be loaded in a Subfile.
Q19: Is the module executable?
Answer:
- No.
Q20: Can we call a module?
Answer:
- CALLB
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