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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. Which three statements about subqueries are true? (Choose three.)

A) The subquery and main query can retrieve data from different tables.
B) A subquery can have more than one main query.
C) Only one column or expression can be compared between the subquery and main query.
D) Multiple columns or expression can be compared between the subquery and main query.
E) A main query can have more than one subquery.
F) The subquery and main query must retrieve data from the same table.

2. Which substitution variable would you use if you want to reuse the variable without prompting the user each time?

A) &&
B) ACCEPT
C) PROMPT
D) &

3. Which SELECT statement will the result 'ello world' from the string 'Hello World'?

A) SELECT LOWER(TRIM ('H' FROM 'Hello World')) FROM dual;
B) SELECT LOWER(SUBSTR('Hello World', 1, 1) FROM dual;
C) SELECT SUBSTR( 'Hello World',1) FROM dual;
D) SELECT INITCAP(TRIM ('Hello World', 1,1)) FROM dual;
E) SELECT LOWER(SUBSTR('Hello World', 2, 1) FROM dual;

4. You are granted the CREATE VIEW privilege. What does this allow you to do?

A) Create a sequence view in any schema.
B) Create a view in any schema.
C) Create a view only of it is based on tables that you created.
D) Create a table view.
E) Create a view that is accessible by everyone.
F) Create a view in your schema.

5. Which statement correctly describes SQL and /SQL*Plus?

A) SQL manipulates data and table definitions in the database; /SQL*Plus does not allow manipulation of values in the database.
B) Both SQL and /SQL*plus allow manipulation of values in the database.
C) /SQL*Plus recognizes SQL statements and sends them to the server; SQL is the Oracle proprietary interface for executing SQL statements.
D) /SQL*Plus is a language for communicating with the Oracle server to access data; SQL recognizes SQL statements and sends them to the server.

Solutions: