Interview 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.

:: 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.

EFT-Electronic Funds Transfer is basically batch of payments are transferring from one bank to another bank with specified time lines.  EFT payments are also called as BACS if it is UK, ACH in US for domestic payments.  Foreign payments are called as SWIFT payments.

WIRE: Wire can be used to release payments for local or international, Different countries will be named in different ways viz., CHAPS for Local Payments made in UK, WIRE for all international payments made from UK and Local & foreign payments made in all other countries

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.