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Oracle MySQL 8.0 Database Developer Sample Questions (Q41-Q46):

NEW QUESTION # 41
Which select statement returns true?

A. SELECT NULL <> NULL;
B. SELECT NULL = NULL;
C. SELECT NULL := NULL;
D. SELECT NULL <=> NULL;

Answer: C

NEW QUESTION # 42
Which two are true about MySQL connectors?

A. Connectors must be installed on both the client and server hosts.
B. Connector/Python is released in precompiled binary and source code.
C. Connector/ODBC is available on Unix, Windows, and MacOS X.
D. Connector/J is based on Connector/C.
E. Connector/NET runs on the Windows platform only.

Answer: A,D

NEW QUESTION # 43
Examine this statement that execute successfully in an interactive session:

The user running this session now goes to lunch for an hour.
Now, examine these statements executed independently in separate sessions while Session 0 is still active:

How many of them will complete while Session 0 is still active?

A. 0
B. 1
C. 2
D. 3
E. 4
F. 5

Answer: F

NEW QUESTION # 44
Examine these statements issued from Session 1 which execute successfully:

Now, examine this statement issued from Session 2:

What is the outcome of the update statement in Session 2?

A. A deadlock will occur.
B. The statement will wait for the transaction in Session 1 to finish.
C. The row will be updated immediately.
D. The transaction in Session 1 will be rolled back automatically.

Answer: D

NEW QUESTION # 45
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?

A. start_time TIMESTAMP duration TIME
B. start_time TIMESTAMP duration TIMESTAMP
C. start_time TIME duration TIME
D. start_time DATETIME duration DATETIME
E. start__time DATETIME duration TIME

Answer: D

NEW QUESTION # 46
......

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