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Ques:- Without logical file we cannot access the data in physicalfile.but we specify physical file in the program(ie:- FfileIF E k disk).how can it be accessed?
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Ques:- If my rpg program has a date field, What extra care Ihave to take while compiling that RPG program?2. If the file is keyed and I have declared the file as wellas Key list properly in my program. Still am getting anerror message like “Chain/reade operation is not allowed”What may be the case?
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Ques:- One physical file can have how many max of logical files?what is the primary file?
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Ques:- Why we cannot call a service program? If I add a PEP can icall the service program?
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Ques:- If login Screen has been modified by adding current date to be displayed.What Step to be followed to Keep that date as Current date Note: If no steps taken then it will display only the compilation date
Asked In :- LibSys,
Ques:- What is need of START 0?. In steed of '0' can we use anyother numerics?. if we use what will happen?.
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Ques:- What are the commands that can be executed in CLP but not inRPG? Why?
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Ques:- What is the intractive job? what is the batch job ?how to change the batch job to interactive job?
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Ques:- What is primary file? How many primary file can be declaredin a RPG program?
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Ques:- How to handle job errors in as400what is the command and where can we find out whether the job has any errors
Asked In :- Zydus Wellness,
Ques:- What is the procedure for running the batch job in mainframe?
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Ques:- What are the the 3 essential fields required for a DL/I call ?
Asked In :- optiver asia pacific,
Ques:- What is elementary level variable and how it is declared?
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The Mainframe category on takluu.com is designed for IT professionals preparing for interviews related to mainframe computing environments. Mainframes are large, powerful computers that handle vast amounts of data and support critical business operations with exceptional uptime and performance.

This category covers key mainframe components and technologies including z/OS operating system, JCL (Job Control Language), COBOL programming, CICS transaction processing, DB2 databases, VSAM files, TSO/ISPF interfaces, and system utilities. Understanding how these components work together to manage batch processing, online transaction processing, and data storage is crucial for many enterprise jobs.

Candidates will find interview questions focusing on job scheduling, debugging batch jobs, dataset management, system commands, performance tuning, and security protocols. Real-time problem-solving scenarios and practical tips for efficient mainframe operations are also included to help you prepare thoroughly.

Mainframe roles often demand knowledge of legacy systems combined with the ability to integrate with modern IT infrastructure, including cloud technologies and automation tools. Whether you are a fresher entering the mainframe domain or an experienced professional upgrading your skills, this category offers comprehensive resources to boost your confidence and technical knowledge.

At Takluu, we provide well-structured content, detailed explanations, and mock interview questions tailored to the demands of mainframe job interviews. Our goal is to help you demonstrate your expertise and secure your dream role in industries that rely heavily on mainframe computing.

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