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| AS400 Interview Questions - Part 11 |
Q1: What is the purpose of the Level check parameter in a physical file?
Answer:
- LVLCHK parameter in CRTPF is used to specify whether level identifier gets checked while opening the file in the program.
- Its value could be *YES or *NO.
Q2: What is file information data structure in AS400?
Answer:
- INFDS is used to make file information to the program.
- Error exceptions are available to program using this.
Q3: What is the program status data structure in AS400?
Answer:
- PSDS makes exceptions available in the program. 1 PSDS per module as it has to be defined in the main source section.
Q4: What is Array in AS400? What are the types of Array?
Answer:
- Array stores the identical elements.
- Types of Arrays
- Compile-Time Array.
- Pre-Run Time Array.
- Run Time Array.
Q5: What is the difference between Non-Join LF and Join LF?
Answer:
- Non-Join LF
- Perform Insert, Update, Delete.
- DFU is available.
- Up to 32 record formats.
- perform Commitment control.
- Join LF
- Cannot perform Insert, Update, Delete.
- DFU is not available.
- 1 record format.
- Cannot perform Commitment control.
Q6: What is the Access path in AS400?
Answer:
- Access path describes the order in which records are to be read.
- Permanent access paths (LF)
- Temporary access paths (OPNQRYF)
Q7: What are the record format field mapping options in CPYF?
Answer:
- *MAP
- *DROP
- *NOCHK
- *CVTSRC
Q8: What is the default access path of a file?
Answer:
- Immediate maintenance access path.
Q9: Can level check error occurs if we do CHGPF?
Answer:
- No, It depend upon LVLCHK parameter in command CRTPF.
Q10: How can we arrange duplicate records in a file?
Answer:
- FCFO
- FIFO
- LIFO
Q11: How to see all record formats used in a file?
Answer:
- DSPFD TYPE(*RCDFMT)
Q12: How to see all members of a file?
Answer:
- DSPFD TYPE(*MBRLIST)
Q13: What is the Source physical file?
Answer:
- It stores the source members.
- CRTSRCPF command is used to create this.
Q14: Is QGPL a User library or System library?
Answer:
- User library.
Q15: What is a library in AS400? What are the types of libraries?
Answer:
- Library stores objects.
- Types of libraries
- System
- Product
- Current
- User
Q16: How many libraries can be there in Library List?
Answer:
- 40 in total (15 system and 25 Users)
Q17: What is RPG?
Answer:
- High-level language.
- Report program generator.
Q18: What is data area and how it is used in RPG?
Answer:
- Data area is an object and used to store data.
- Used to share data within different programs.
- IN and OUT in RPG for accessing data area.
Q19: Which program RPG or CL is efficient to update a transaction onto a database file and why?
Answer:
- Not easily perform such operation in CL and hence opt for RPG.
Q20: What is the purpose of Indicators in RPG?
Answer:
- Used in Result.
- Used with Conditions
- Control level Indicators.
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