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Oracle 1z1-909 Exam Syllabus Topics:

Topic Details
Topic 1
  • Explain application development with NoSQL and XDevAPI
  • Handle and interpret errors and warnings
Topic 2
  • Rewrite queries for optimization
  • Store and process string data
Topic 3
  • Store and process spatial data
  • Design, create, and alter views
Topic 4
  • Use MySQL Shell to access document stores
  • Retrieve data from the database by using a connector
Topic 5
  • Demonstrate connector use, management and configuration
  • Secure credentials and connections
Topic 6
  • Schedule database operations
  • Store and process temporal data
Topic 7
  • Understand locking mechanisms within MySQL
  • Control transactions in applications

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Oracle MySQL 8.0 Database Developer Sample Questions (Q26-Q31):

NEW QUESTION # 26
Examine this statement which has executed successfully:

  • A. The statement takes advantage of index description_idx.
  • B. No index will improve statement performance.
  • C. Execution performance can be improved by adding an index on column description.
  • D. Execution performance can be improved by, using a composite index with column description as the leftmost prefix column description.
  • E. Execution performance can be improved by using like instead of RLIKE.

Answer: D
NEW QUESTION # 27
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. The statement will wait for the transaction in Session 1 to finish.
  • B. A deadlock will occur.
  • C. The row will be updated immediately.
  • D. The transaction in Session 1 will be rolled back automatically.

Answer: D
NEW QUESTION # 28
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. Java treats the socket file as insecure.
  • B. The X Dev API protocol must be enabled to use sockets in Connector/J driver.
  • C. socket is a reserved word in Java.
  • D. The socket can only be accessed from the local host.
  • E. The socket is not implemented in Connector/J driver.

Answer: A,E
NEW QUESTION # 29
Examine these statements which execute successfully:

Now, examine this query:

What is the result?

  • A. It inserts a row with an error.
  • B. It fails with an error.
  • C. It inserts a row with a warning.
  • D. It fails with a warning.
  • E. It inserts a row with no error or warning.

Answer: E
NEW QUESTION # 30
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: A
NEW QUESTION # 31
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