SAP ABAP Interview Question

what is the use of ENQUEUE?
Generate a Lock Entry in LOck Table.
what is the use of DEQUEUE?
Remove a Lock Entry from LOck Table.
How many types of Lock in SAP?
Share Lock:
It is a Read only Lock.
It prevents data from being changed while  user is reading it.
Exclusive Lock:
It is a write Lock.
It prevents data from being changed while  used is already modifying it.


Define BADI?
BADI -- Business add-in.
BADI's are New concept that make use of ABAP Object Technology.
This is true Object oriented approach to SAP enhancements using Classes,Interfaces and Methodsto Implement the BADI.

types of views in ABAP

• ·        Database Views.
• ·        Projection views.
• ·        Help Views.
• ·        Maintenance view.

Parameters in Search Help in SAP ABAP

• ·        Import Parameter.
• ·        Export Parameter.
• ·        Internal Parameter.

Table vs Structure in SAP

Table:

• ·        Can Have Primary Key.
• ·        Can store the Data physically.
• ·        Processes technical attributes.

Structure:

• ·        No Primary Key.
• ·        No Physical storage data.
• ·        No technical Attributes.

types of table in ABAP

• ·        Transparent Table.
• ·        Pooled or Cluster Table.

independent transport objects in Data dictionary

• ·        Domain
• ·        Data Elements
• ·        Table
• ·        Technical Settings for table.
• ·        Secondary indexes for transparent Table.
• ·        Structure
• ·        View
• ·        Match code object
• ·        Match Code IDs
• ·        Lock Object