Oracle Database Administration I — Question 33

The SCOTT/TIGER user exists in two databases, BOSTON_DB and DALLAS_DB, in two different locations.
Each database has a tnsnames.ora file defining DALLAS_DB as a service name.
Examine this command:
CREATE DATABASE LINK dblink1 CONNECT TO scott IDENTIFIED BY tiger USING 'dallas_db';
How do you execute the command so that only SCOTT in BOSTON_DB can access the SCOTT schema in DALLAS_DB?

Answer options

• A. as SCOTT in DALLAS_DB
• B. as SCOTT in BOSTON_DB
• C. as SCOTT in BOSTON_DB and SYS in DALLAS_DB
• D. as SYS in both the databases
• E. as SCOTT in both the databases

Correct answer: B

Explanation

The correct answer is B because the command must be executed by the SCOTT user in BOSTON_DB to establish the database link to DALLAS_DB. The other options either involve executing the command from the wrong database or using SYS, which is not required for this operation.