Cognizant Mainframe Programmer Interview Questions and Answers

Mainframes are large computers used for critical applications. JCL is a scripting language used to control mainframe operations.

• Mainframes are known for their reliability, security, and scalability.

• They are used in industries such as banking, healthcare, and government.

• JCL stands for Job Control Language and is used to define and execute mainframe jobs.

• JCL statements include job control statements, data definition stat...read more

COBOL is a programming language used for business applications. COMP is a COBOL data type for storing numbers.

• COBOL stands for Common Business Oriented Language

• It was developed in the late 1950s and early 1960s

• COBOL is used for developing business applications such as banking, insurance, and finance

• COMP is a COBOL data type used for storing numbers in binary format

• COMP can be further classified into COMP-3, which is us

Main topic in mainframes is processing large amounts of data with high reliability and security.

• Data processing and storage

• Batch processing

• Transaction processing

• Security and reliability

• COBOL programming language

• JCL (Job Control Language)

• VSAM (Virtual Storage Access Method)

• CICS (Customer Information Control System)

• DB2 (Database Management System)

• IMS (Information Management System)

To start a program, you need to compile the source code and then execute the compiled code.

• Write the program code in a text editor or an IDE

• Save the code with the appropriate file extension

• Compile the code using a compiler or an interpreter

• Execute the compiled code

• Debug the program if necessary

VSAM stands for Virtual Storage Access Method and is a file management system used in mainframe computers.

• VSAM is used to organize and access data stored on disk in a mainframe environment.

• It supports both sequential and random access to data.

• Non-VSAM refers to file systems that do not use VSAM, such as flat files or relational databases.

• VSAM provides features like record-level locking, high performance, and efficient ...read more

DB2 is a relational database management system and COBOL is a programming language used for business applications.

• DB2 is used to store and manage data in a structured manner

• COBOL is used to write programs for business applications

• DB2 and COBOL are often used together in mainframe environments

• COBOL programs can access and manipulate data stored in DB2 databases

Db2 stands for Database 2, a relational database management system used in mainframes.

• Db2 is used for storing and retrieving data in mainframes.

• It supports SQL (Structured Query Language) for querying and manipulating data.

• Db2 is known for its scalability, reliability, and security features.

• It is widely used in industries such as banking, finance, and healthcare.

• Db2 has various editions such as Db2 for z/OS, Db2 for Li

IBM Full Form in COBOL

• IBM stands for International Business Machines

• COBOL stands for Common Business Oriented Language

• IBM is a company that produces hardware and software, including mainframes

• COBOL is a programming language commonly used for business applications

• IBM mainframes are often used for running COBOL programs