[Aug 23, 2026] 1Z0-171 Exam Dumps – Oracle Practice Test Questions [Q44-Q62]

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[Aug 23, 2026] 1Z0-171 Exam Dumps – Oracle Practice Test Questions

New Real 1Z0-171 Exam Dumps Questions

NEW QUESTION 44
What does the EXISTS operator check in a subquery?

If the subquery returns any rows

If the subquery contains only unique values

If the subquery returns a specific number of rows

If the subquery references the outer query

NEW QUESTION 45
Which of the following is a valid reason to create a synonym?

To improve query performance

To provide simplified and consistent access to an object

To enforce unique constraints on a table

To automatically generate numeric values for a column

NEW QUESTION 46
What is the primary purpose of a primary key in a relational database?

To store duplicate data in a table

To uniquely identify each record in a table

To establish relationships between tables

To sort data in ascending order

NEW QUESTION 47
What is the output of the following query?
SELECT CURRENT_DATE FROM dual;

The current date in the database time zone

The current date in the session time zone

The current date and time in the database time zone

The current date and time in UTC

NEW QUESTION 48
What is required for the queries combined by a SET operator to work correctly?

The result sets must have the same number of columns and compatible data types.

The tables must be joined using a primary key.

Both queries must include the WHERE clause.

Both queries must use the GROUP BY clause.

NEW QUESTION 49
Which SQL keyword is used to remove duplicate rows from the result set of a query?

UNIQUE

DISTINCT

DISTINCTROW

ONLY

NEW QUESTION 50
What is a sequence in Oracle Database?

A list of numbers stored in a table

A database object that generates a series of unique numeric values

A type of index used for sorting rows

A predefined set of SQL queries executed in order

NEW QUESTION 51
Which of the following is true about foreign key constraints in SQL?

They enforce the uniqueness of values in a column.

They define a relationship between two tables.

They ensure that a column only contains NULL values.

NEW QUESTION 52
Which SQLPlus command displays defined substitution variable values?

SHOW

VERIFY

DEFINE

LIST

NEW QUESTION 53
What does the following SQL query do?
SELECT * FROM employees WHERE salary > 5000 ORDER BY department_id;

Retrieves all employees with a salary greater than 5000, sorted by salary in ascending order

Retrieves all employees, sorted by department ID

Retrieves all employees with a salary greater than 5000, sorted by department ID in ascending order

Retrieves employees with salary less than 5000, sorted by department ID

NEW QUESTION 54
What does the NEXTVAL pseudocolumn do in SQL?

Retrieves the current value of a sequence without incrementing it

Retrieves the next value in a sequence and increments the sequence

Resets the sequence to its starting value

Deletes the sequence from the database

NEW QUESTION 55
What does the following query return?
SELECT employee_id
FROM employees
WHERE department_id IN (SELECT department_id FROM departments WHERE location_id = 1000);

Employees working in location ID 1000

Employees with no department

Departments located in location ID 1000

Employees with salaries greater than 1000

NEW QUESTION 56
What does the INTERSECT operator do in SQL?

Combines all rows from two queries without any conditions

Combines rows from two queries and includes all duplicates

Returns rows from the first query that are not present in the second query

Returns rows that are present in both queries

NEW QUESTION 57
How is the LOCALTIMESTAMP function different from CURRENT_TIMESTAMP?

LOCALTIMESTAMP does not include fractional seconds, while CURRENT_TIMESTAMP does.

LOCALTIMESTAMP omits time zone information, while CURRENT_TIMESTAMP includes it.

LOCALTIMESTAMP returns only the date, while CURRENT_TIMESTAMP returns the date and time.

Both functions are identical in output.

NEW QUESTION 58
Which statement can be used to undo changes made in a transaction?

SAVEPOINT

ROLLBACK

COMMIT

MERGE

NEW QUESTION 59
What is the purpose of the MERGE statement in SQL?

To combine the results of two queries

To update existing rows or insert new rows in a target table

To delete duplicate rows from a table

To join two tables into one

NEW QUESTION 60
Which SQL function can be used to replace NULL values with a specified value?

NVL

ISNULL

REPLACE

COALESCE

NEW QUESTION 61
Which of the following best describes a relational database?

A database where all data is stored as key-value pairs

A database that uses a tabular structure with rows and columns to represent relationships between data entities

A database that organizes data hierarchically

A flat file system with no defined relationships between data

NEW QUESTION 62
Which INTERVAL data type would you use to store a period of time in years and months?

INTERVAL DAY TO SECOND

INTERVAL YEAR TO MONTH

INTERVAL MINUTE TO HOUR

INTERVAL MONTH TO DAY

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[Aug 23, 2026] 1Z0-171 Exam Dumps – Oracle Practice Test Questions [Q44-Q62]

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