IBM ADABAS (Adaptable DAta BAse System) Interview Questions

 
1.
What is the difference between Null compression and default compression?
2.
How to initialize a variable which is a constant in a LDA. Suppose I want to declare a variable #a N1(1:7) having constant values as 1,2,3,4,5,6, and 7 for respective occurance then how can we do that?
3.
What is an Associator in ADABAS?
4.
What is the significance of DBID used in Adabs?
5.
Suppose If i have updated few fields of Adabas file using UPDATE command, and after that i used display to see that field get updated or not. If in Display it showing nothing or record did not get updated then what can be the possible reasons?
6.
How will you the specification of database file?
7.
What is adabas?