Most Recent Oracle 1Z0-909 Exam Dumps

Prepare for the Oracle MySQL 8.0 Database Developer exam with our extensive collection of questions and answers. These practice Q&A are updated according to the latest syllabus, providing you with the tools needed to review and test your knowledge.

QA4Exam focus on the latest syllabus and exam objectives, our practice Q&A are designed to help you identify key topics and solidify your understanding. By focusing on the core curriculum, These Questions & Answers helps you cover all the essential topics, ensuring you're well-prepared for every section of the exam. Each question comes with a detailed explanation, offering valuable insights and helping you to learn from your mistakes. Whether you're looking to assess your progress or dive deeper into complex topics, our updated Q&A will provide the support you need to confidently approach the Oracle 1Z0-909 exam and achieve success.

The questions for 1Z0-909 were last updated on Apr 1, 2025.

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Question No. 1

The variables c and d are declared as integer types.

Examine these initialization statements with placeholder value , which execute successfully:

Now, examine this loop which executes successfully:

Which loop results in the same value of d for all valid values of ?

AOption A

BOption B

COption C

DOption D

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Correct Answer: A

Question No. 2

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?

AThe X Dev API protocol must be enabled to use sockets in Connector/J driver.

BThe socket is not implemented in Connector/J driver.

CThe socket can only be accessed from the local host.

Dsocket is a reserved word in Java.

EJava treats the socket file as insecure.

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Correct Answer: B, E

Question No. 3

Examine the output:

Which explain command will obtain the output?

AEXPLAIN ANALYZE

BEXPLAIN PARTITIONS

CEXPLAIN FORMAT=TREE

DEXPLAIN PORMAT^TRADITIONAL

EEXPLAIN PORMAT=JSON

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Correct Answer: E

Question No. 4

The collection col contains all episodes for all seasons for a TV show.

Examine this document which has an example of the details for each episode:

Which query returns all expisode names from the first season?

ASELECT doc->'$.name' FROM col WHERE doc->'$.season' = '1';

BSELECT 'S.name' FROM col WHERE 'S.season' = '1';

CSELECT doc-,,$.name,, FROM col WHERE doc-'$ . season' = '1';

DSELECT name FROM col WHERE season = 1;

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Correct Answer: B

Question No. 5

Examine this table definition:

The table must always remain a valid document store collection. What restriction does this impose on any added column?

AThe column must be a generated column referencing any attribute of doc.

BThe column must have a default value.

CThe column must be used in a unique constraint.

DThe column must be a generated column referencing only an existing attribute of doc.

EThe column must be indexed.

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Correct Answer: A

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