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| AS400 Interview Questions - Part 9 |
Q1: How do we retrieve system date in CL?
Answer:
- Use CL command RTVSYSVAL SYSVAL(QDATE). Return variable will be required.
Q2: What is the command to convert date format in CL?
Answer:
- Use CL command CVTDAT.
Q3: What is the command used for retrieving user profile attributes?
Answer:
- RTVUSRPRF
Q4: What is a Message queue?
Answer:
- Send/receive messages.
- Stores messages in the storage pool and then sent them to the user, to the system or to workstations.
Q5: What are the different types of Message queues?
Answer:
- workstation MSGQ.
- User profile MSGQ.
- Job MSGQ.
- System Operator MSGQ.
- History Log MSGQ.
Q6: What is the Monitor group in RPG?
Answer:
- Used for Error handling in RPG.
Q7: What is the difference between *LIKE and *NAMVAR?
Answer:
- *LIKE is used to define variables in RPG.
- *NAMVAR is used to define data areas in RPG.
Q8: MSGID to catch all generic messages in CL?
Answer:
- CPF0000
Q9: What is the Output queue (*OUTQ)?
Answer:
- List of output/printer files waiting to print.
Q10: What is a Job queue (*JOBQ)?
Answer:
- List of Jobs waiting their turn to be processed.
Q11: How can a programmer exit out of the CL program?
Answer:
- RETURN
Q12: How do we get to know the CHKOBJ command is failed?
Answer:
- CPF9801
Q13: Can we reposition file pointers in CL after reaching EOF? Explain how it works.
Answer:
- Yes, using the CLOSE command in CL.
Q14: Do the SETLL and SETGT retrieves the record?
Answer:
- No, position on or after the record.
Q15: How can we handle the error in RPG?
Answer:
- Monitor group
- PSDS (program status data structure)
- *PSSR subroutine
- Opcode extender E.
- INFDS for files.
- %ERROR opcode.
Q16: In F specs, when you define a flat-file in your program, which format do you specify?
Answer:
- F - Fixed length
Q17: What is the opcode which we will be using to find the previous matching record?
Answer:
- READPE
Q18: How do READP works?
Answer:
- Read a file in Reverse order.
Q19: What is the opcode to find the matching record?
Answer:
- READE
Q20: What is the opcode that is used to find a change record?
Answer:
- READC.
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