PL SQL Interview Questions and Answers Preparation Practice Test | Freshers to Experienced | Detailed Explanations
What you will learn
In-depth Understanding of PL/SQL Concepts and Applications
Proficiency in Writing and Debugging PL/SQL Code
Expertise in Advanced PL/SQL Features and Best Practices
Preparedness for Real-world PL/SQL Interview Scenarios
Why take this course?
- Correct Answer: A
Explanation: PL/SQL is an imperative programming language designed specifically for triggering, procedural logic in the Oracle database. It is a powerful tool for writing stored procedures and triggers to manipulate data directly within the Oracle environment.
- Correct Answer: C
Explanation: The primary purpose of PL/SQL is to extend the capabilities of SQL by incorporating procedural elements to process and manage data in complex ways that cannot be accomplished with standard SQL statements alone.
- Correct Answer: B
Explanation: Exception handlers in PL/SQL are used to catch and handle runtime exceptions (errors) that occur during program execution. They allow a program to continue running or gracefully terminate when an error occurs, rather than abruptly stopping. While improving performance and facilitating database interaction are important aspects of PL/SQL, they are not the primary purpose of exception handling.
- Correct Answer: B
Explanation: The key distinction between functions and procedures in PL/SQL is that functions must return a value and are typically used for computations that produce a result. Procedures do not return a value but can perform operations and can accept parameters, perform actions, and return multiple values through OUT or INOUT parameters.
- Correct Answer: B
Explanation: The FOR loop in PL/SQL is most appropriate for executing a block of code a specific number of times because it allows for precise control over the number of iterations. It is designed to loop over a range, subprogram, or cursor.
- Correct Answer: D
Explanation: Cursors in PL/SQL are used to process individual rows returned by SQL queries. They provide a way to handle data one record at a time and perform complex data manipulation operations on each row of data.
- Correct Answer: A
Explanation: PL/SQL collections are data structures for temporary data storage, allowing for the management of sets of data within PL/SQL programs. They are essential for handling multiple pieces of data under a single variable and are used for bulk operations or complex data processing tasks.
Feel free to enroll in a PL/SQL course to deepen your understanding and practice these concepts in real-world scenarios!