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Exam Details

The Oracle 1z0-071 exam is made up of 78 multiple-choice questions that are to be completed within the allocated timeframe of 120 minutes. The test is proctored by Pearson VUE, the official partner of Oracle. To schedule your session, you need to pay the fee of $245. But before that, you have to create an account with CertView, a web-based portal for all the Oracle certification activity. After you complete the exam, you will receive a notification from Oracle to your email address that your results are available on CertView. Log into the portal and click “See My New Exam Result Now” to find out whether you passed your 1z0-071 test or not. To ace this exam, you need to give no less than 63% of correct answers.

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Oracle Database SQL Sample Questions (Q398-Q403):

NEW QUESTION # 398
Examine the description of the EMPLOYEES table

Which two queries return the highest salary in the table?

A. SELECT department_id, MAX(salary)
FROM employees
GROUP BY department_id;
B. SELECT MAX (MAX (salary))
FROM employees
GROUP BY department_id;
C. SELECT MAX (salary)
FROM employees
GROUP BY department_id
HAVING MAX (salary) = MAX (MAX (salary));
D. SELECT MAX (salary)
FROM employees
GROUP BY department_id;
E. SELECT MAX (salary)
FROM employees;

Answer: B,E

NEW QUESTION # 399
Examine this list of queries:
Which two statements are true?

A. 2 returns the value 20.
B. 3 returns an error.
C. 2 and 3 give the same result.
D. 1 and 4 give the same result.
E. 1 and 4 give different results.

Answer: A,D

NEW QUESTION # 400
Examine this statement:

What is returned upon execution?

A. 0 rows
B. 2 rows
C. an error
D. 1 row

Answer: D

NEW QUESTION # 401
Examine this SELECT statement and view the Exhibit to see its output: (Choose two.)

SELECT constraints_name, constraints_type, search_condition, r_constraints_name, delete_rule, status, FROM user_constraints WHERE table_name = 'ORDERS'; Which two statements are true about the output?

A. The R_CONSTRAINT_NAME column contains an alternative name for the constraint.
B. The STATUS column indicates whether the table is currently in use.
C. In the second column, 'c' indicates a check constraint.
D. The DELETE_RULE column indicates the desired state of related rows in the child table when the corresponding row is deleted from the parent table.

Answer: C,D

NEW QUESTION # 402
Which two are true about unused columns?

A. A primary key column cannot be set to unused.
B. The DESCRIBE command displays unused columns
C. Unused columns retain their data until they are dropped
D. A foreign key column cannot be set to unused.
E. Once a column has been set to unused, a new column with the same name can be added to the table.
F. A query can return data from unused columns, but no DML is possible on those columns.

Answer: C,E

Explanation:
Unused columns are a feature in Oracle that allows a column to be marked as unused without immediately dropping it from the table structure. The key points for each option are:
A: The DESCRIBE command does not display unused columns. These columns are also not visible in user_tab_cols but are visible in user_unused_col_tabs.
B: Primary key columns can be set to unused, but you must drop the primary key constraint before doing so.
C: Once a column is marked as unused, it is not possible to query it, and Oracle will not allow DML operations on that column.
D: This is true. Once a column is set to unused, you can add a new column with the same name because Oracle essentially considers the unused column as removed from the table.
E: Just like primary key columns, a foreign key column can be marked as unused, but you must drop the foreign key constraint first.
F: This is true. Unused columns retain their data until the column is dropped using the DROP UNUSED COLUMNS command.
References:
* Oracle Database SQL Language Reference, 12c Release 1 (12.1): "ALTER TABLE"
* Oracle Database Administrator's Guide, 12c Release 1 (12.1)

NEW QUESTION # 403
......

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