Most Recent Oracle 1Z0-909 Exam Questions & Answers

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The questions for 1Z0-909 were last updated on Dec 17, 2024.

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Question No. 1

Examine these lines of Python code:

You must add a line of code to complete the code to return data to the variable d. Which line will do this?

Ad = cursor.execute(query)

Bd = cursor.execute(query, (hire_start, hire_end) )

Cd = cursor.fetch(query % (hire_start, hire_end))

Dd = cursor.fetch(query, (hire_start, hire_end))

Ed = cursor . f etchall (query)

Fd = cursor.fetchall(query, (hire_start, hire_end))

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Correct Answer: D

Question No. 2

The meeting table stores meeting schedules with participants from five continents. The participants' details are stored in another table.

You need to adjust the start_time and duration columns for optimal storage. What datatype changes would achieve this?

Astart_time TIMESTAMP duration TIMESTAMP

Bstart_time TIMESTAMP duration TIME

Cstart_time DATETIME duration DATETIME

Dstart_time TIME duration TIME

Estart__time DATETIME duration TIME

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Correct Answer: C

Question No. 3

Which two statements are true about aggregate functions?

ASUM () returns o if there are no rows to aggregate.

BMAX () returns null if there are no rows to aggregate.

CCOUNT (distinct) returns a count of the number of rows with different values including Null.

DMIN () cannot use distinct when it executes as a Windows function.

EAVG () does not allow use of the distinct option.

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Correct Answer: E

Question No. 4

Examine this event's metadata:

Now examine this command:

DROP USER 'userl'e'localhost';

Which effect will the command have on the event?

AThe event is scheduled and executed but fails. The system will log an error.

BThe event is scheduled but will no longer execute. The system will log an error.

CThe event will be dropped without an error or warning.

DThe event is not scheduled and will no longer execute. The system will log an error.

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Correct Answer: B

Question No. 5

Which two differences exist between the timestamp and date time data types?

Atimestamp has larger range of values.

Btimestamp uses less storage space.

Ctimestamp stores more decimal points in seconds

Dtimestamp converts the value based on the session time zone.

Etimestamp stores the interval between two dates.

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Correct Answer: B, D

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