1.What is Mainframe?

Ans:Mainframe is an industry term for a large computer, typically manufactured by a large company such as IBM for the commercial applications of Fortune 1000 businesses and other large-scale computing purposes. Historically, a mainframe is associated with centralized rather than distributed computing. Today, IBM refers to its larger processors as large servers and emphasizes that they can be used to serve distributed users and smaller servers in a computing network.

2. What is the difference between a MenuItem and a CheckboxMenuItem?

Ans:The CheckboxMenuItem class extends the MenuItem class to support a menu item thatmay be checked or unchecked.

3. why External Sort is more effiecient than Internal sort?

Ans:For internal sort,you need to code a program by specifying the sort criteria and that the program need to be compiled and linked.
But in case of External sort,there is no need for coding the program.Moreover you can change the sort criteria just by changing the sort parameters that passed thru the SYSIN card.
So the external sort is more efficient compared to internal sort.In case of internal sort,if you want to modify the SORT criteria,you need to repete the entire procees of changing the program,compile and linking it.

4. How to use endivour tool?

Ans:Endevor is a Version Control Tool. Through this tool we can get the code from production side and do the changes in code. It will create a version for the changes program. Through that we can easily find the changed program. This tool uses to compile tha changed code also, we can see the results in TSO region just like compile cobol program. Once its over need authorisation to upload program to the production region.

5. What is the difference between static and dynamic call?

Ans:In the static call the load module of the called pgm is linked with the calling pgm. While in case of dynamic call the 2 load modules stay separately.
In case of dynamic call the called pg can be used by many other pgms.

6. What is retrofit analysis?

Ans:Retrofit is nothing but, adding the misiing code when (when version is in producton and the 2nd you are working in development region)

2nd case arrises when two differeng region codes are to be merged as one then we retrofit the one region with the other.

Its analysis would mean to determine or check if the desired results are being met or not

.7. What is Infoman?

Ans:Infoman is a tool, which is used for reporting purposes. Some organizanations use it as a tool to manage all the phases of SDLC, right from the customer's requirements.

8. How to recognize that a computer is -Main Frame OR Mini Frame?

Ans:minicomputers or AS 400 are small computer in which at a time a single job can be processed.
but in main frame these are very large computers and at a time many many job can be processed also in this COBOL programming language is used but in mini computers cobol is not used.

9. What is the difference bet IEWL & HEWL LINKING PGMS?

Ans:There is no difference between these two...you are allowed to use any of both...some times installation prefers the things.

10. How can i run sun routine program and how it link to main program?

Ans:sub routine is a program which we call from main program by using static or dynamic call. We give this link in linkage section of Data division. For sub routine u should run 2 loadlibs , if u are calling with dynam and for static only 1 loadlib is enough

11. What is the difference between PROC and PGM?

Ans:Proc is the name which begins the procedure. It is mandatory when you go for a procedure you have to give proc.
Pgm is the name of the program you want to execute. Default Pgm's for ex. are sort, idcams, iebcopy

12. What are the verbs in procedure division of cobol?

Ans:ADD, SUB, DIVIDE, MULTIPLY, SEARCH, EXAMINE, INSPECT, STRING, UNSTRING etc.,

13. What are the physical components in mainframe?

Ans:The physical components of Maninframe is DASD and other type of Auxiliary storages devices like Tape and Main storage.

14. where would u use jcllib ?

Ans:after the job statement and before EXEC statement..it is for to store catalog procedure in member of pds

15. what is soc4 & soc7 errors?

Ans:soc4 means subscript being out of range.soc7 means uninaialized numeric field.for soc7 if we are doing numeric opretion which field is defined as non-numeric

16. What is averange record legth in KSDS?

Ans:The average record length must be less than or equal to the maximum record length. The Maximum Record Length is 2046.

17. how to create a vsam file from a flat file?

Ans:STEP1:Sort the input flat file in an ascending sequence//step1 exec pgm=sort//sysout dd sysout=*//sysin dd * sort fields=(starting location of the key field,length in bytes,sort seq(asc or desc),format(ch))/*step2;create the VSAM cluster using idcams//step2 exec pgm=idcams//sysprint dd sysout=*//sysin dd *define cluster(name(your.base.cluster) -volumes(*) - keys(length in bytes,starting position of key field) - recordsize(avg,max) -freespace(20 ,20)) - data(name(your.base.data) -)index(name(your.base.index) -controlintervalsize(4096)))Step3:Use repro to load the flat file to vsam file//step3 exec pgm=idcams.//sysprint dd sysout =*//sysin dd *REPRO INDATASET("FLAT FILE") OUTDATASET("YOUR BASE CLUSTER FILE")//

18. In vsam why we use export-import utility?

Ans:Export utility is used to take a backup of VSAM dataset in tape and then import utility is used to restore that dataset again from tape.

19. Why VSAM concept came into existence ?

Ans:It is efficient,high performance tool,allows backup and recovery,provides data security and integrity.

20. How vsam datasets are cataloged?

Ans:When you allocate the vsam cluster at that time you have the option to catlog the dataset using the idcam utility. Apart from this tools like file aid also gives you an option to catalog a vsam dataset.