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Oracle MySQL 8.0 Database Developer Sample Questions (Q12-Q17):

NEW QUESTION # 12
Examine this statement and output:

Which is true?

A. The underlying table's index on the Name column is not chosen because of low selectivity.B. Column Name in myview can be indexed if the is_updatable attribute is true.C. myview cannot be automatically indexed.D. myview was defined with the temptable processing algorithm.

Answer: D

NEW QUESTION # 13
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?

A. d = cursor . f etchall (query)B. d = cursor.fetch(query % (hire_start, hire_end))C. d = cursor.execute(query)D. d = cursor.fetch(query, (hire_start, hire_end))E. d = cursor.fetchall(query, (hire_start, hire_end))F. d = cursor.execute(query, (hire_start, hire_end) )

Answer: D

NEW QUESTION # 14
Which two statements are true about AUTO_INCREMENT?

A. A table can have multiple AUTO_INCREMENT columns.B. The decimal data type supports AUTO_INCREMENT.C. An AUTO_INCREMENT column must be indexed.D. A server restart always resets the AUTO_INCREMENT value to largest value in the AUTO_INCREMENT column plus 1.E. AUTO_INCREMENT values allocated to a transaction that is rolled back are not reused.

Answer: C,E

NEW QUESTION # 15
A server hosts MySQL Server and Apache Webserver supporting a PHP/PDO based application.
The application must be migrated from PHP to their Java application server on another host. The MySQL instance remains on the original host.
Examine the PDO connection string used in the existing application:
Mysql:host-localhost;dbname=sales;unix_socket=/var/run/mysql.sock
Which two prevent Java from using the Unix socket?

A. The socket is not implemented in Connector/J driver.B. The socket can only be accessed from the local host.C. The X Dev API protocol must be enabled to use sockets in Connector/J driver.D. Java treats the socket file as insecure.E. socket is a reserved word in Java.

Answer: A,D

NEW QUESTION # 16
Examine the Test.php script which is numbered for clarity, and its output:

PHP Fatal error: Uncaught Error: call to underined function mysqli_connect () in Test.php:2 Which action will fix this error?

A. Replace line 2 with Slink = mysql.connect {"localhost: 3306n, "username", "pas "schema") ;B. Install the PHP executable in the path used by the MySQL installation.C. Replace line 2 With: Slink = mysql_xdevapi\getSession
("mysqlx://username:password@localhost:3306","schema");D. Enable the mysqli extension in the php.ini file.

Answer: C

NEW QUESTION # 17
......

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