PL/SQL Assessment Test! Trivia Quiz

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| By Cripstwick

Cripstwick

Community Contributor

Quizzes Created: 636 | Total Attempts: 741,361

Questions: 10 | Attempts: 332 | Updated: Mar 21, 2023

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PL/SQL Assessment Test! Trivia Quiz - Quiz

PL/SQL assessment test trivia quiz! We have a questionnaire designed for system developers who want to test out just how much they know about the system query languages and how to carry them out. If you feel like you are up to the challenge, take up the quiz and share it with others to see how smart you are compared to them on the topic. All the best!

Questions and Answers

1.

What is the meaning of PL?
- A.
  
  Project language
- B.
  
  Procedural language
- C.
  
  Purpose language
- D.
  
  Programming language
Correct Answer
B. Procedural language

Explanation
A procedural language is a type of programming language that is based on a procedure or a sequence of steps. It focuses on the process of executing a program rather than the data that is being manipulated. In contrast to other types of languages, such as object-oriented or functional languages, procedural languages are more concerned with how a task is performed rather than the overall structure of the program. Therefore, the meaning of PL in this context refers to Procedural language.

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2.

What is an exception in PL/SQL?
- A.
  
  The error handling part of PL/SQL
- B.
  
  The role part of PL/SQL
- C.
  
  The joint part of PL/SQL
- D.
  
  The column part of PL/SQLl
Correct Answer
A. The error handling part of PL/SQL

Explanation
An exception in PL/SQL refers to the error handling part of the language. In PL/SQL, exceptions are used to handle unexpected errors or exceptional conditions that may occur during program execution. When an exception is raised, the program flow is transferred to the exception handling section, where the appropriate action can be taken to handle the error. This can include displaying an error message, logging the error, or performing any necessary cleanup operations. Exceptions allow for more robust and controlled error handling in PL/SQL programs.

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3.

What are the two types of exceptions?
- A.
  
  Username and password
- B.
  
  Admin and user
- C.
  
  System and user
- D.
  
  User_defined and predefined
Correct Answer
D. User_defined and predefined

Explanation
The correct answer is "User_defined and predefined." This answer correctly identifies the two types of exceptions in programming. User-defined exceptions are custom exceptions created by the programmer to handle specific error conditions in their code. Predefined exceptions, on the other hand, are exceptions that are already defined in the programming language and can be used to handle common error situations.

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4.

Which of these is called a statement in PL/SQL?
- A.
  
  Function
- B.
  
  Table
- C.
  
  Procedure
- D.
  
  Exception
Correct Answer
C. Procedure

Explanation
A procedure in PL/SQL is a named block of code that performs a specific task. It can be called or invoked by other PL/SQL blocks or programs. Procedures are used to encapsulate a series of SQL and PL/SQL statements, allowing them to be reused and modularized. Unlike functions, procedures do not return a value. They are commonly used for tasks such as data manipulation, data validation, and business logic implementation. Therefore, a procedure is considered a statement in PL/SQL.

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5.

All of these rules applies to nulls while making comparisons except...
- A.
  
  Null cannot be equal or unequal to other values
- B.
  
  If a value is null then the expression itself is null
- C.
  
  Null can only be false
- D.
  
  Null can only be true
Correct Answer
C. Null can only be false

Explanation
This answer is correct because null can have three possible states: null, true, or false. Null is not limited to being only false, as it can also be true or simply null. Therefore, the statement "Null can only be false" is incorrect.

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6.

How many data types are available in PL/SQL?
- A.
  
  3
- B.
  
  8
- C.
  
  4
- D.
  
  5
Correct Answer
C. 4

Explanation
PL/SQL, a procedural language used in Oracle databases, has four data types: NUMBER, VARCHAR2, DATE, and BOOLEAN. These data types allow for the storage and manipulation of different types of data within PL/SQL programs. Therefore, the correct answer is 4.

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7.

What are the two types of cursor in PL/SQL?
- A.
  
  Open and Close cursor
- B.
  
  Implicit and Explicit cursor
- C.
  
  In and Out cursor
- D.
  
  Entry and Exit cursor
Correct Answer
B. Implicit and Explicit cursor

Explanation
Implicit and Explicit cursors are the two types of cursors in PL/SQL. Implicit cursors are automatically created by the Oracle server for DML statements and are used to process SQL statements that are not explicitly declared. On the other hand, Explicit cursors are user-defined and are explicitly declared and used to process SQL statements in PL/SQL code. They offer more control and flexibility compared to Implicit cursors.

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8.

Which of these activities all rows in a table when enabled?
- A.
  
  Trigger
- B.
  
  Constraints
- C.
  
  Block
- D.
  
  Functions
Correct Answer
B. Constraints

Explanation
Constraints are used to define rules and restrictions on the data in a table. When enabled, constraints ensure that all rows in a table adhere to these rules. They can be used to enforce data integrity, such as ensuring that certain columns have unique values or that foreign key relationships are maintained. Therefore, when constraints are enabled, they apply to all rows in a table, making them the correct answer to the question.

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9.

A table which is currently being changed by DML is called a...
- A.
  
  Constraining table
- B.
  
  Cursive table
- C.
  
  Moving table
- D.
  
  Mutating table
Correct Answer
D. Mutating table

Explanation
A table which is currently being changed by DML is called a mutating table. This term is commonly used in database management systems to refer to a table that is being modified by an ongoing Data Manipulation Language (DML) operation, such as an INSERT, UPDATE, or DELETE statement. When a table is mutating, it means that its data is in a transitional state and cannot be accessed or modified by other concurrent transactions until the DML operation is completed. This is done to ensure data integrity and prevent conflicts or inconsistencies in the database.

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10.

Variables which are declared in procedure headings and referenced in the procedure body are called...
- A.
  
  Variables
- B.
  
  Procedural variables
- C.
  
  Actual parameters
- D.
  
  Formal parameters
Correct Answer
D. Formal parameters

Explanation
Formal parameters are variables that are declared in the procedure headings and referenced in the procedure body. They are used to pass values between the calling code and the called procedure. In other words, formal parameters act as placeholders for values that will be provided when the procedure is called.

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