Which is true for ROWID% data type

technology databases

  1. Binary data upto 4GB

  2. Character data upto 4 GB

  3. A hexadecimal string representing the unique address of a row in its table

  4. Binary data stored in an external file

Show answer
Correct Option: C
Explanation:

To solve this question, the user needs to know about the ROWID data type in databases.

The ROWID is a pseudo column added by Oracle to all tables, which stores the row's unique identifier. The ROWID is represented in hexadecimal format, and it uniquely identifies each row in a table.

Now, let's go through each option and explain why it is right or wrong:

A. Binary data upto 4GB: This option is incorrect because ROWID is not a data type that stores binary data.

B. Character data upto 4 GB: This option is incorrect because ROWID is not a data type that stores character data.

C. A hexadecimal string representing the unique address of a row in its table: This option is correct. The ROWID data type stores a hexadecimal string that represents the unique address of a row in its table.

D. Binary data stored in an external file: This option is incorrect because ROWID is not a data type that stores binary data in an external file.

The Answer is: C

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