Technology Questions

Dynamic method dispatch which is also known as runtime polymorphism is a process in which a call to an overridden method is resolved at runtime rather than at compile-time. In this process, an overridden method is called through the reference variable of a superclass. The determination of the method to be called is based on the object being referred to by the reference variable.

The CICS translator converts the EXEC CICS commands into call statements for a specific programming language. There are CICS translators for Assembler, COBOL, and PL/1.

C requires all the variables to be declared at the beginning of a scope but in c++ we can declare variables anywhere in the scope. This makes the programmer easier to understand because the variables are declared in the context of their use.

:: is the scope resolution operator

$message is a variable with a fixed name. $$message is a variable whose name is stored in $message. 

If $message contains "var", $$message is the same as $var.

One can use simple conditions like >= and <=, or use between/and but the trick here is to know your exact data type.

- Sometimes date fields contain time and that is where the query can go wrong so it is recommended to use some date related functions to remove the time issue. In SQL Server common function for accomplishing the task datediff () function.

- Interviewees also have to be aware of different time zones and server time zone.

-To increase query performance you may still want to use between however you should be aware of proper format you should use if not it might misbehave during filtering.

Return Code in JCL can b obtained by the use of COND paramater...it is used to know the return codes of previous steps.