Oracle - Dynamic SQL and Dynamic PL/SQL MCQ

Oracle – Dynamic SQL and Dynamic PL/SQL

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1. Which statement in Oracle is used to execute dynamic SQL statements?

SELECT INTO

DECLARE CURSOR

EXECUTE IMMEDIATE

OPEN FOR

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2. What is the primary advantage of using dynamic SQL in Oracle?

It enables flexible query construction

It is less prone to SQL injection

It allows for faster query execution

It simplifies the code structure

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3. In dynamic SQL, what is the purpose of binding variables in Oracle?

To declare dynamic cursors

To pass values into dynamic SQL statements

To define dynamic cursor attributes

To concatenate them with SQL statements

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4. Which method of dynamic SQL execution in Oracle allows you to execute anonymous PL/SQL blocks?

Method 4

Method 3

Method 2

Method 1

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5. What is the primary difference between Method 2 and Method 4 dynamic SQL in Oracle?

Method 2 is limited to SELECT statements, while Method 4 can execute any SQL statement

Method 2 uses DBMS_SQL, while Method 4 uses EXECUTE IMMEDIATE

Method 2 is preferred for read-only operations, while Method 4 is suitable for both read and write operations

Method 2 uses BIND variables, while Method 4 uses explicit cursors

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6. In Oracle dynamic SQL, what is the primary purpose of the BIND VARIABLES?

To execute DDL statements

To declare explicit cursors

To pass values into SQL statements

To dynamically declare PL/SQL functions

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7. Which argument mode is used for BIND variables in Oracle dynamic SQL when you want to pass a value into the SQL statement?

DEFAULT

IN OUT

OUT

IN

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8. When using dynamic SQL in Oracle, what is the purpose of the EXECUTE IMMEDIATE statement?

To execute a dynamic SQL statement

To open a dynamic cursor

To declare a dynamic cursor

To fetch data from a dynamic cursor

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9. In dynamic SQL, what is the advantage of using placeholders for values in Oracle?

It improves query performance

It avoids SQL injection

It allows for better error handling

It simplifies query construction

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10. What is the primary reason to minimize the use of concatenation in dynamic SQL statements in Oracle?

To improve query performance

To prevent SQL injection

To simplify code structure

To execute DDL statements

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11. In dynamic PL/SQL, what is the primary purpose of using dynamic blocks in Oracle?

To execute static SQL statements

To replace repetitive code with dynamic code

To declare dynamic cursors

To simplify code structure

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12. Which method of dynamic SQL execution in Oracle is recommended when you want to minimize parsing of dynamic cursors?

Method 3

Method 4

Method 2

Method 1

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13. In dynamic PL/SQL, what is the primary advantage of using dynamic blocks in Oracle?

It enables the reuse of dynamic SQL statements

It simplifies code structure

It reduces the need for dynamic cursors

It allows for more efficient query execution

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14. What is the primary benefit of using invoker rights for shared programs in dynamic PL/SQL?

It allows for dynamic cursor declaration

It speeds up query execution

It simplifies code structure

It improves security by limiting access to program objects

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15. What is the recommended approach to anticipate and handle dynamic errors in Oracle?

Use explicit cursors instead of dynamic cursors

Avoid dynamic SQL altogether

Minimize the use of placeholders

Implement proper error handling with EXCEPTIONS

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16. Which Oracle feature is used to minimize the dangers of code injection when using dynamic SQL?

DBMS_SQL

EXECUTE IMMEDIATE

BIND variables

Method 4

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17. When is the use of DBMS_SQL recommended in Oracle dynamic SQL?

When you need to execute anonymous PL/SQL blocks

When you want to avoid placeholders

When you want to minimize parsing

When you want to execute DDL statements

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18. In Oracle Database 11g, what new feature enhances security for DBMS_SQL?

DBMS_LOCK

SecureFiles

DBMS_RANDOM

DBMS_CRYPTO

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19. What is the primary purpose of the OPEN FOR statement in dynamic SQL in Oracle?

To bind values to placeholders

To execute a dynamic SQL statement

To declare a dynamic cursor

To declare a cursor variable

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20. In dynamic SQL, what is the primary purpose of binding variables in Oracle?

To declare dynamic cursors

To concatenate them with SQL statements

To pass values into dynamic SQL statements

To define dynamic cursor attributes

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Oracle – Dynamic SQL and Dynamic PL/SQL MCQ