If the following SQL statements are executed:
CREATE DATABASE testdb AUTOMATIC STORAGE NO;
CONNECT TO testdb;
CREATE STOGROUP sg1 ON ‘/data1’;
CREATE STOGROUP ibmstogroup ON ‘/data2’;
CREATE STOGROUP sg2 ON ‘/data3’;
Which storage group is the default storage group for the TESTDB database?

A.
SG1

B.
SG2

C.
IBMSTOGROUP

D.
IBMDEFAULTTSG

Explanation:
https://www.tutorialspoint.com/db2/db2_storagegroups.htm