Digital communication is a form of intermediary communication. Digital communication uses numeric codes and data to deliver messages through electronic networks that are received as text, images, video, or voice messages.
Which of the following options is the main task of the execution step in the Java program execution process?
Execution - The JVM interprets the program bytecode bytecode by bytecode and executes the program.
What choices are used to decide whether to execute a statement or series of statements?
The IF statement allows you to conditionally execute a series of statements. That is, whether or not the sequence is executed depends on the value of the condition. The IF statement has three forms:
IF-THEN , IF-THEN-ELSE and IF-THEN-ELSIF .
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Which of the following statements is true when you use MySQL Workbench to run INSERT, UPDATE, and DELETE statements?
If autocommit mode is on you can rollback the changes by clicking on the Rollback button.
By default, the changes are automatically committed to the database.
By default, the changes are rolled back when you exit MySQL Workbench unless you commit them.
If autocommit mode is on you can commit the changes by clicking on the Commit button.
All of the following statements are true when you use MySQL Workbench to run INSERT, UPDATE, and DELETE statements:
Explanation in Detail:
In MySQL Workbench, autocommit mode determines whether changes made to the database are automatically committed or rolled back when you execute an INSERT, UPDATE, or DELETE statement. By default, autocommit mode is turned on, which means that changes are automatically committed to the database as soon as they are made.
If you want to be able to roll back changes made to the database, you can turn off autocommit mode by clicking on the "Autocommit" button in the MySQL Workbench toolbar. This will allow you to execute multiple statements without committing them to the database until you are ready. You can then commit or roll back the changes as needed by clicking on the "Commit" or "Rollback" button in the toolbar.
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In a PHP application using PDO, a _____ consists of the host, port, and name of the database that will be used to establish a connection to the database.A- Data ConnectionB- PDO ObjectC- Data Source Name
A Data Source Name is a string that includes the host, port, and name of the database that will be used to connect to the database in a PHP application that uses PDO.
The data-access abstraction layer provided by PHP's PDO allows you to execute queries and retrieve data using the same functions regardless of the database you're using. PDO is not a database abstraction; it doesn't rewrite SQL or mimic inaccessible features. Among many other databases, PDO (PHP Data Objects) is a general database abstraction layer that supports MySQL. It offers prepared statements and a lot of flexibility in the way that data is returned. The details necessary to establish a connection to the database are contained in the Data Source Name, or DSN. A DSN typically starts with the name of the PDO driver, is followed by a colon, and then the connection syntax unique to that driver. The PDO driver-specific documentation provides additional details. The DSN establishes the kind of database.
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