IBM AS400 Interview Questions And Answers

This can be done using the Key Field.

KEY1(NAME FIELD) SETLL FILENAME
KEY1(NAME FILED) READE FILENAME

Actually the file ABCD may have the record format name is
same as that of the file name. That is the reason why u r
getting this error.
RPGLE wont allow to declare a file with same name as record
format name.
So, to solve the problam u can change the record format
name other than the file name.
OR
U can use the RENAME keyword in the file specification to
change the record format name.

There is no comparison between DO and ITER as DO statement
is an looping statement and ITER is an branching statement
like LEAVE.
When I use ITER with some condition inside a DO-ENDDO loop,
when that condition occouerd, ITER transferred the control
to ENDDO not out of the loop like LEAVE ie it just skip the
execution of statements between ITER and ENDDO.

In one statement we can say that ITER in RPGLE is same as
CONTINUE in C.

All RTV* commands can be executed at CLP but cannot be
executed at RPG.

In RPGLE if you want to declare the same file in more then
once mode(read/write/update)in this case you can override
the file with different name and declare the same file with
the overriden name.
for example:
In RPGLE if you want to open a file A in two different mode
one is Read and other is Update then you can override the
same file with two different name may be AA and AB and then
declare in your RPGLE program.

This will happen if there is any duplicate records in
physical file..

The RENAME keyword allows you to rename record formats in
an externally described file. The external name of the
record format that is to be renamed is entered as the
Ext_format parameter. The Int_format parameter is the name
of the record as it is used in the program. The external
name is replaced by this name in the program.

To rename all fields by adding a prefix, use the PREFIX
keyword.

A and B will cross the bridge. --> 2 mins
A will come back with the flashlight. --> 1 min
C and D will cross the bridge --> 10 mins
B will come back with the flashlight. --> 2 mins
A and B will cross the bridge. --> 2 mins

Total is 17 mins.

it is also normal process like as batch job steps...
when we found job in MSGW using WRKSBMJOB,simply we can enter into job log using 5 option.
after we start at command line.
step1-> STRSRVJOB jobnum/jobname/user
step2-> STRDBG pgmname
when we press enter,the control will directly goto
the error occurred line,here we can change any values directly using EVAL then after press F3,it will sho wjob log screen,then again press f3 to come to MSGW screen.here press 7(display message screen) to continue the execution of batch job we press G(continue).then it will execute remaing steps without abnormal ending the job.

We can retrieve RRN value in RPGLE program by using INFDS

Command attention will not return any data from the screen to the program. Command function returns date from the screen to the program.

we suppose to select SFLDSPCTL with N option in SFL.
EX : goto strsda - select sflctl take opt 8 and then enter - select all general keywords with perameter Y and then next window will open there we can see the SFLDSPCTL, Here we can follow above steps.

Testn opcode will the check data type in result field like if we have result field is character then only character data type will move to this otherwise it will through the error

SNDPGMMSG

While loading the sub file we can simply increase the value of rrn or we can do this by using SFLINZ

dsppfm & runqry

READC is used to read the changed records in the subfile. But the catch is, it cannot read the same records twice. To overcome this situation, use SFLNXTCHG.

Array is collection of similar data type where as multi occurrence ds can be
combined like number as well as char.