Hi...can anyone please help me with the following query?

Assuming that the create table statement is executed successfully,

CREATE TABLE T1 (COL1 INTEGER NOT NULL, PRIMARY KEY(COL1))

which 2 of the following system catalogs are updated?

a) SYSCAT.INDEXES
b) SYSCAT.PRIMARY KEYS
c) SYSCAT.TABLES
d) SYSCAT.NOTNULLABLECOLS
e) SYSCAT.CONSTRAINTS

I feel the answer is 'a' and 'c'...but i am not sure if there is any SYSCAT.CONSTAINTS...

Please let me know the correct answers.

Yes a,c is the right ans.
Details about primary keys can be found in syscat.indexes as unique indexes are always formed on creation of primary key.
Foreign key constraints can be found in syscat.references

In addition, the COLUMNS catalog table is updated too; that's where NOT NULL conditions (and defaults) are stored.
SYSCAT.CHECKS contains the check constraints. (None in this case.)

Thanks for the replies Rahul and Peter...really appreciate your help..!!