AS400 Interview Questions

Hello sir, I am RAnjeet Beswal. I am form Kolkata. I am preparing for as400 interview. Can you help me by providing me with some information regarding the as400 interview questions?

[Shaleen]

As you have asked about the AS400 interview questions, check below for the information
What does ‘AS’ in AS400 stands for?
Ans: Application system.

2. What is ‘LPAR’?
Ans: OS/400 Version 4, introduced a feature LPAR (Logical PARtitioning) which facilitates running multiple operating systems simultaneously on one IBM System i unit ensuring that one OS doesn’t interfere other’s system resources/memory.

3. What is library is AS400? What are the types of library?
Ans: When we execute a command or call a program, the AS/400 must know where to find the command or program and the answer is library. A Library is a collection of objects. QSYS is the only library that contains other library. QSYS is the root library where the entire user defined/ system defined library is created. System supplied libraries begin with the letter "Q" or "#".

Library list types:
System library: All IBM supplied library e.g. QSYS, QHLPSYS, QUSRSYS…
Product Library: Whenever Ibm product is used it is added to the library automatically and is removed itself when the job completes.
Current Library: Current library is the working library i.e. all the work done by you is stored in current library.
User Library: Non-IBM supplied i.e. created by the user.


4. Which library gets first loaded into the system when we login?
Ans: QSYS

5. Is QGPL a user library or system library?
Ans: It’s a user library.

6. How can we see all the objects and its sizes in a library?
Ans: By using the command DSPLIB.

7. What is source physical file?
Ans: Source physical file is a file which contains the sources of different types of objects. There can be up to 32768 members. Source physical file is an object. But the source member is not an object. When we compile the member, the object is created for that source. Command used is CRTSRCPF.

8. How to see all members of a file?
Ans: By using the command shown below:
DSPFD FILE(IROBO1/QRPGLESRC) TYPE(*MBRLIST)

9. How to see all record formats used in a file?
Ans: By using the command shown below:
DSPFD FILE(IROBO1/QRPGLESRC) TYPE(*RCDFMT)

10. How to change the record size of a physical file?
Ans: By using the command below:
CHGPF FILE(AMITNEM/OBJ) SRCFILE(AMINEM/QDDSSRC) SRCMBR(OBJ_SRC)