Tag: technology

To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) True - This option is correct. In Java, static dispatch refers to the binding of a method call to its declaration at compile-time, based on the static type of the reference variable. This means that the method to be called is determined at compile-time and does not change at runtime.

Option B) False - This option is incorrect. Static dispatch does exist in Java.

The correct answer is A) True. This option is correct because static dispatch is a concept in Java where the method to be called is determined at compile-time based on the static type of the reference variable.

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To answer this question, you need to understand the features and capabilities of different PL/SQL execution methods. Let's go through each option to understand why it does or does not help in executing multiple PL/SQL programs simultaneously.

Option A) Oracle Advanced Queuing - This option is incorrect because Oracle Advanced Queuing allows you to enqueue and dequeue messages, which can be used to execute PL/SQL programs asynchronously and in parallel. This feature enables multiple PL/SQL programs to be executed simultaneously.

Option B) DBMS_JOB - This option is incorrect because the DBMS_JOB package allows you to schedule and run PL/SQL programs as jobs. These jobs can be run concurrently, allowing for the execution of multiple PL/SQL programs simultaneously.

Option C) DBMS_SQL - This option is correct because the DBMS_SQL package is used for dynamic SQL execution. While it provides a way to execute SQL statements dynamically, it does not provide a direct mechanism for executing multiple PL/SQL programs simultaneously.

Option D) Pipelined Functions - This option is incorrect because pipelined functions allow you to process data in a streaming manner, which can be beneficial for executing multiple PL/SQL programs simultaneously. Pipelined functions enable the processing of data in parallel and can be used to execute multiple PL/SQL programs concurrently.

The correct answer is Option C) DBMS_SQL. This option does not help in executing multiple PL/SQL programs simultaneously because it is primarily used for dynamic SQL execution and does not provide a direct mechanism for concurrent execution of PL/SQL programs.

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To answer this question, we need to understand the differences between VARCHAR, VARCHAR2, and STRING data types.

Option A) Both are the same - This option is incorrect because VARCHAR and VARCHAR2 are not the same. They have slight differences in their behavior and storage capacity.

Option B) Both are different - This option is partially correct. VARCHAR and VARCHAR2 are indeed different data types, but they have similar functionalities.

Option C) None of these - This option is incorrect because there are differences between VARCHAR and VARCHAR2.

Option D) The subtypes VARCHAR and STRING are equivalent to VARCHAR2 - This option is correct. In Oracle databases, the subtypes VARCHAR and STRING are equivalent to VARCHAR2. Both VARCHAR and STRING can be used interchangeably with VARCHAR2 without any differences in functionality.

The correct answer is D) The subtypes VARCHAR and STRING are equivalent to VARCHAR2.

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