Oracle - Conditional and Sequential ControlMCQ

Oracle – Conditional and Sequential Control

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1. What is the primary purpose of an IF-THEN statement in Oracle PL/SQL?

To perform conditional logic

To perform calculations

To create tables

To declare variables

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2. In the context of Oracle PL/SQL, what does the IF-THEN-ELSE statement combination allow you to do?

Create tables

Declare variables

Perform calculations

Perform conditional logic with an alternative action

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3. Which combination of IF statements is used when you have multiple conditions to evaluate in Oracle PL/SQL?

IF-THEN-ELSIF

IF-ELSIF

IF-THEN

IF-THEN-ELSE

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4. What should you be cautious of when using IF statements in Oracle PL/SQL to avoid potential issues?

Missing semicolons

Incorrect variable declarations

Nested IF statements

Case sensitivity

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5. How can you handle complex conditional logic in Oracle PL/SQL by using IF statements?

By nesting multiple IF statements

By avoiding IF statements altogether

By using the GOTO statement

By using CASE statements

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6. In Oracle PL/SQL, what is the purpose of a simple CASE statement?

To perform calculations

To create tables

To perform conditional logic with a single expression

To handle exceptions

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7. What is the primary purpose of a searched CASE statement in Oracle PL/SQL?

To perform calculations

To handle exceptions

To declare variables

To perform conditional logic with multiple expressions

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8. When do you use nested CASE statements in Oracle PL/SQL?

To simplify conditional logic

To create complex data structures

To perform calculations

To declare variables

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9. What is the primary difference between simple and searched CASE statements in Oracle PL/SQL?

Simple CASE statements allow for multiple conditions, while searched CASE statements use a single condition

Simple CASE statements use expressions, while searched CASE statements use conditions

There is no difference; the terms are interchangeable

Simple CASE statements are used for calculations, while searched CASE statements are used for declarations

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10. What is the purpose of a CASE expression in Oracle PL/SQL?

To simplify conditional logic

To create complex data structures

To handle exceptions

To perform calculations

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11. What is the primary purpose of the GOTO statement in PL/SQL?

To terminate the program

To perform calculations

To create a loop

To transfer control to a labeled statement

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12. In PL/SQL, what does the NULL statement do?

It declares a variable

It raises an exception

It performs a specific task

It does nothing and is a no-op

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13. What can be a potential issue when using the GOTO statement in PL/SQL?

It is not supported in PL/SQL

It can lead to code that is hard to read and maintain

It can create complex nested loops

It always results in an exception

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14. In PL/SQL, when is the GOTO statement considered a best practice?

When creating simple loops

When handling exceptions

When avoiding conditional logic

When simplifying code

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15. In PL/SQL, how does the NULL statement affect program execution?

It always raises an exception

It speeds up execution

It terminates the program

It has no effect and is a no-op

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16. What is the primary purpose of the IF-THEN-ELSIF combination in Oracle PL/SQL?

To handle multiple conditions with a single IF statement

To create nested loops

To simplify code

To perform calculations

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17. When using nested IF statements in Oracle PL/SQL, what should you be cautious of?

Incorrect variable declarations

Excessive indentation and readability

Using ELSE statements

Case sensitivity

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18. In Oracle PL/SQL, what is the primary purpose of a simple CASE statement?

To perform calculations

To create tables

To declare variables

To simplify conditional logic

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19. What is the main advantage of using CASE statements over IF statements in Oracle PL/SQL?

IF statements are more versatile

IF statements are always faster

CASE statements are more efficient

CASE statements simplify code and improve readability

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20. In Oracle PL/SQL, what does the GOTO statement allow you to do?

Simplify complex code

Create nested loops

Handle exceptions

Transfer control to a specific statement

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21. What is the primary purpose of the NULL statement in PL/SQL?

To perform calculations

To terminate the program

To maintain program structure

To raise an exception

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22. When using CASE expressions in Oracle PL/SQL, what is the benefit of using them in SQL queries?

They can replace IF statements

They are used for error handling

They simplify complex queries

They eliminate the need for NULL values

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23. What is the primary advantage of using CASE expressions in SQL queries?

They are used for error handling

They simplify complex queries

They can replace IF statements

They eliminate the need for NULL values

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Oracle – Conditional and Sequential ControlMCQ