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Hoe COND code works in Mainframe!

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Hoe COND code works in Mainframe!- Grapevine

Welcome to IT Company Discussion's Private Community

Let's mainframe!

What is DCLGEN in DB2?

DCLGEN (Declarations generator) are used in the COBOL-DB2 programs that we write. The program should declare the tables and views that it accesses. DCLGEN produces these DECLARE statements so that we do not need to code these statements manually. It also generates corresponding host variable structures. When DCLGEN is used to generate a table declaration, the DB2 uses the DB2 catalog to get the relevant information from it. DCLGEN, then uses this information to create an SQL DECLARE TABLE statement for the table/view.
DCLGEN has SQL DECLARE TABLE statement, the Cobol equivalent variables for columns and NULL indicators too.

All About Mainframes

Questions asked in Mainframe interviews for a mid level experienced candidate-

1. What is checkpoint restart logic and how will you code it in your program?
2. What is file parallel processing in Cobol programs?
3. What is commit logic in programs?
4. Explain the use of Cursor.
5. Explain these abends- -305, -803,-904,-911.
6. What is real time use of GDG concept?
7. INREC FIELD ,INCLUDE COND Sort examples.
8. What is Array and how is it used, what are subscript and index?
9. What are search and search all and how are they coded?
10.Why is version control tool used? (next is how do you deploy a component from dev to prod?)
11.How do u schedule a job using job scheduling tool?
12.What is your daily task and how do u get requirement?
13.Have u worked on a project from end to end?
14.Challenges you faced while delivering a project.
15.Have you interacted with stakeholders?
16.What is SDLC process?
17.Have u ever done estimation of any requirement?
18.Difference between continue and next sentence.
19.Redefines real time examples.

There are more but these are frequently asked questions-

Hope it helps!

Let's Mainframe! Important Interview questions for a Mainframe developer

Lets' mainframe!

Do you know what DBRM is?

DBRM is Database Request Module and is a component inside DB2, it is created after the pre-compilation of COBOL-DB2 program. This is a module that consists of SQL source statements that get extracted out of the application program. DBRMs form inputs that are used for binding process which creates the executable format of it which is then used during execution of the program

All About mainframes

What is a SUBSCRIPT in Mainframe?

Subscript:

A subscript is an integer value that indicates the position of an element in an Array(table).
It can be defined in working-storage section with PIC S9(4) COMP.
It's an integer that indicates the occurrence number in an array.

Example: If you have a table which is defined as 

01 WS-ARRAY OCCURS 100 TIMES, then the first element can be accessed by using WS-ARRAY (1).

Example:

DATA DIVISION.
WORKING-STORAGE SECTION.
01 WS-SUBSCRPT PIC S9(4) COMP.
01 WS-ARRAY.
02 WS-ELEMENT PIC X(5) OCCURS 10 TIMES.
PROCEDURE DIVISION.
MOVE 5 to WS-SUBSCRPT.
ADD 2 TO WS-SUBSCRPT.
MOVE ‘ABCDE’ TO WS-ELEMENT(WS-SUBSCRPT).

This will move ‘ABCDE’ to element number 7.

Welcome to Business Roles's Private Community

I’m a 2022 grad, hit by onboarding delay for 8 months after graduation (during those time I grinded leetcode approx ~400 questions, learnt spring boot ) Recently I joined one of the WITCH companies which I was offered in 2021. I was trained in Java but now they put me into Mainframe project dealing with COBOL programming and DB2 and I’ve never felt this underconfident and worthless in life. I’m planning for MS in CS in 2024. Does this work experience help in anyway? Is a switch needed before I apply to masters? 
I would really appreciate if anyone could suggest me what to do.

Advice needed

System Engineer

As a college student I currently have 2 options. Whether to learn mainframe technologies as a part of the subject very wisely so I can apply in companies like BMC and IBM or shall I stick with DSA practicing. Enlighten me in areas of scope, advancement and salary.

Is learning mainframe technologies good or shall I stick to DSA?

People working in banks - JPMC, HSBC, Morgan Stanley, BoA, etc : 

What tech stack are you using  predominantly for backend?

Are you using on-premise or VPC for storing data? 

What version control are you using?

You might be having custom software for core banking, but what kind of wrapper are you using over it?

I work in a financial services company that makes software for banks so wanted to know if the stack is similar. ( not panning a hack 😂 )

Stack used in banks?

Software Engineer

Let's mainframe!



Distinction between CHAR and VARCHAR data types -



CHAR data type has a predetermined maximum length, while VARCHAR data type is a varying length character string. 

So, it means, Char will always have the same length to store the text, but VARCHAR alters its length based on the length of the string which has to be stored, which helps in saving memory. 



The CHAR data type in DB2 stores character data in a fixed-length field. It can store letters, numbers, and other characters which are supported. 

However, VARCHAR data type is a varying-length character string that can contain letters, numbers, and special characters.



#mainframe #db2

Do anyone of you know or heard about the above languages

AS400/ COBOL

Let's Mainframe! :)

VB (Variable Blocked) file:

There are two types of control information in a VB file-
 1) Block descriptor Word (BDW) and 2) Record descriptor Word (RDW) with the data in a VB file.

There might be several records in one physical block. Each variable length record has a RECORD DESCRIPTOR WORD(RDW). 

 RDW is of 4 bytes. The first 2 bytes store the length of the record.
Each block has a BLOCK DESCRIPTOR WORD(BDW) at the beginning of the block. The BDW is of 4 bytes. The first 2 bytes contain 
the length of the block.

The representation of a VB block file is below-

BDWRDWRECORDRDWRECORDRDWRECORD

That is why when the logical record length of a Variable blocked file is 80 , it is 4 bytes RDW and 76 bytes data.

I’m working as Mainframe developer for past 2years but I need career change in domain how to do and what to do ?!

Job Accounting information usually defines a person or department to whom processor time is billed for mainframe job execution.

This value varies from project to project and company to company. It totally depends on the guidelines set by the company.



This accounting information value is generally a number, but it may consist of multiple pieces of information and not just a single 

as it is set as per company guidelines. Its value depends on that. The accounting information is passed on the JOB statement, not the EXEC statement.





Below are a few examples--



Example 1:



//JOB1 JOB A123-1212



Example 2:



//JOB2 JOB (A123-1212,'11/12/99')

Welcome to Banking & Finance's Private Community

I had an experience of 1 year 10 months(In oct 2 years will be ) in providing Banking and finance solutions. 
If anyone can refer me it could be grateful for me ..

Hey Hii guy's!!!

Working in App support (mainframe,java apps, gcp). How to switch to dev?

Support Engineer

Hello friends, PFA the compensation sheet for 25 lpa CTC for TCS. Can some please help me to calculate approx take home salary? Please consider 1.5 lacs standard 80C deduction and 26000 as HRA per month. 
No other deductions apart from mentioned in the sheet.

TCS - Need help to figure out Take Home salary

Looking for genuine and non diplomatic answers since it will be anonymous. It is upto you to reveal the name of the company you resigned from.

Lets discuss!!! I will go first -

I quit my last organisation (a famous UPI company) in 2020 because, they still are in old technology. No cloud computing, no kubernates, no terraform. Their entire baremetal infra are in 2 DCs (Mumbai and Bangalore). Leadership ideas are outdated. I was very much bored and looking for a change.

Why did you resign?

Amount of effort i put and the salary i got was not proportional. 14 hrs to get 30k salary as a fresher. I had understood that I deserve better - thus i moved to get better pay and better wlb (which I got in swiggy)

Founder

DevOps Engineer

I am a mainframe developer with 10 years experience and have an offer from both TCS (25 lpa) and Capgemini (28 lpa). 
Which one could be a better choice overall, and not just monetary?

Hoe COND code works in Mainframe!

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