Free Access Oracle.1z1-071.v2025-05-13.q352 Practice Test (Page 44)

Question 211

Which three statements are true about built-in data types?

A.A VARCHAR2 blank-pads column values only if the data stored is non-numeric and contains no special characters.

B.The default length for a CHAR column is always one character.

C.A VARCHAR2 column definition does not require the length to be specified.

D.A BLOB stores unstructured binary data within the database.

E.A CHAR column definition does not require the length to be specified.

F.A BFILE stores unstructured binary data in operating system files.

Question 212

Examine this SQL statement:

Which two are true?

A.All existing rows in the EMPLOYEES table are deleted.

B.The subquery is executed before the DELETE statement is executed.

C.The subquery is not a correlated subquery.

D.The DELETE statement executes successfully even if the subquery selects multiple rows.

E.The subquery is executed for every row in the EMPLOYEES table.

Question 213

Which two statements are true about the DUAL table?

A.It can display multiple rows and columns.

B.It can be accessed only by the SYS user.

C.It can be accessed by any user who has the SELECT privilege in any schema

D.It can display multiple rows but only a single column.

E.It consists of a single row and single column of VARCHAR2 data type.

F.It can be used to display only constants or pseudo columns.

Question 214

View the Exhibit and examine the structures of the employees and departments tables.

You must update the employees table according to these requirements::
-Update only those employees who work in Boston or Seattle (locations 2900 and 2700).
-Set department_id for these employees to the department id corresponding to London (locationid 2100).
-Set the employees' salary in iocation_id 2100 to 1.1 times the average salary of their department.
-Set the employees' commission In location_id 2100 to 1.5 times the average commission of their department.
You issue this command:

What is the result?

A.It executes successfully and produces the desired update.

B.It generates an error because a subquery cannot have a join condition in an update statement.

C.It executes successfully but does not produce the desired update.

D.It generates an error because multiple columns cannot be specified together in an UPDATE statement.

Question 215

Examine this query:
SELECT employee_id,first_name,salary
FROM employees
WHERE hire_date>'&1';
Which two methods should you use to prevent prompting for a hire date value when this query is executed?

A.Execute the SET VERIFY ON command before executing the query.

B.Store the query in a script and pass the substitution value to the script when executing it.

C.Execute the SET VERIFY OFF command before executing the query.

D.Replace'&1' with'&&1' in the query.

E.Use the UNDEFINE command before executing the query.

F.Use the DEFINE command before executing the query.

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Question 211

Question 212

Question 213

Question 214

Question 215

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