What are the mainframe interview questions for DB2?

What are the mainframe interview questions for DB2?

These DB2 mainframe interview questions will let you know about Subselect, Inner and Outer join, GroupBy, OrderBy, etc. DB2 questions have been written to get you acquainted with SQL databases. What is DB2? What are the major components of DB2?

What is the role of the buffer manager in DB2?

Answer: The buffer manager is the DB2 component responsible for physically transferring data between an external medium and (virtual) storage (performs the actual I/O operations). It minimizes the amount of physical I/O actually performed with sophisticated buffering techniques (i.e., read-ahead buffering and look-aside buffering).

What is the purpose of DB2 timestampdiff function?

DB2 TIMESTAMPDIFF is a function provided by IBM that is used to find out the number of intervals in the unit of type mentioned by the first argument that is being passed to this function. TIMESTAMPDIFF function basically calculates the difference between the two timestamp values which is nothing but time or period interval.

How does the bind function work in DB2?

The bind uses Database Request Modules from the DB2 pre-compile step as input and produces an application plan. It checks for user authentication and validates SQL statements in the DBRM (s).

Do you need to prepare for DB2 interview?

DB2 admin expert’s people are very much highly demanded in the current market scenario; the base salary is also very attractive. If you are looking for a job related to DB2, you need to prepare for the 2021 DB2 Interview Questions.

Can you use Max in a DB2 interview?

These are the basic DB2 Interview Questions asked in an interview. Yes, it is possible to use MAX easily in the case of the column defined as CHAR. But it is required to ensure that a CHAR column should always contain some numeric value; in that case, MAX will always provide the correct result in the case of DB2.

What is the role of buffer manager in DB2?

Buffer manager can be considered as the component inside DB2 that helps in transferring data between virtual as well as external medium. The buffer manager reduces the quantity of physical input as well as output operations that are actually performed by making use of buffering techniques that are highly sophisticated.