VSAM Interview Questions

VSAM Introduction In this Mainframe tutorial, you will learn about VSAM, what is VSAM, VSAM structure, types of VSAM datasets, Entry Sequenced Data Set (ESDS), Key Sequenced Data Set (KSDS), Linear Data Set (LDS) and Relative Record Data Set (RRDS). What is VSAM? VSAM stands for Virtual Storage Access...

VSAM Catalogs In this Mainframe tutorial, you will learn about VSAM Catalogs, Master Catalog, User Catalog and Data Space of VSAM. Master Catalog Master Catalog in VSAM is like captain of a ship, since all files used in VSAM is controlled by this master catalog. The attributes of files like password...

VSAM Structure In this Mainframe tutorial, you will learn about VSAM Structure,  four major areas of VSAM structure, what is VSAM cluster, VSAM components, Defining VSAM cluster and Example for defining VSAM clusters. There are four major areas in the structure of VSAM. They are: The Master...

VSAM Control Interval and Control Area In this Mainframe tutorial, you will learn about VSAM Control Interval, What is a Control Interval in VSAM? and Control Area, what is VSAM control area, attributes in the control area index component. What is a Control Interval in VSAM? Control Interval in...

Re-Hosting Based Modernization Evolving from the core re hosting approach and leveraging flexible, rules driven automated conversion tools, this approach goes beyond re hosting to a functionally equivalent application. Instead of a pure shift of COBOL code to a target system without any changes to the...

Multiple Virtual Storage (MVS) First let us start with an insight to the topic Multiple Virtual Storage. MVS stands for Multiple Virtual Storage and this is the technology used mainly with IBM mainframe systems. MVS origin is interesting to know. The first developed technology was MVT which stands for...

Bi-directional extracts refer to the ability of a system to extract, cleanse and transfer data in two directions among different database types which include hierarchical, networked, and relational databases. This functionality is extremely useful in data warehousing projects. Data warehouse extraction...