Sopra Steria Mainframe Developer Interview Questions and Answers

Call by value passes a copy of the value while call by reference passes the address of the value.

• Call by value is used for simple data types like int, float, etc.

• Call by reference is used for complex data types like arrays, structures, etc.

• Call by value does not modify the original value while call by reference can modify the original value.

• Call by value is faster than call by reference as it does not involve memory ac...read more

OOPs is a programming paradigm based on the concept of objects that interact with each other.

• OOPs stands for Object-Oriented Programming.

• It focuses on creating objects that have properties and methods.

• Encapsulation, Inheritance, Polymorphism, and Abstraction are the four main pillars of OOPs.

• Example: A car is an object that has properties like color, model, and methods like start, stop, and accelerate.

Job Control Language (JCL) is used to define and execute jobs on mainframe systems.

• JCL statements are used to specify the job to be executed, including input/output files, program to be run, and other job control parameters.

• Example: //JOBNAME JOB (ACCOUNT), 'DESCRIPTION',CLASS=A,MSGCLASS=X

• JCL statements are written in a specific format with keywords and parameters to define the job steps and execution flow.

• Example: //S

IDCAMS is the utility used to create a GDG.

• IDCAMS is a utility program used in z/OS to define and manage VSAM datasets, including GDGs (Generation Data Groups).

• To create a GDG using IDCAMS, you would typically write a JCL job that includes IDCAMS statements to define the GDG base and generations.

• Example: //STEP1 EXEC PGM=IDCAMS //SYSIN DD * DEFINE GDG(NAME(TEST.GDG) LIMIT(10) SCRATCH)