Multiple choice technology databases

Examine the structure of the LOB_STORE table. Name Null? Type ---------------- -------- ------------ LOB_ID NUMBER VIDEO_CLIP BLOB You create a 'DATA_FILES' directory object that contains the 'IMAGE1.GIF'operating system (OS) file. View the Exhibit and examine the LOAD_LOB procedure code that you execute for reading data from the OS file into the BLOB column. It is created with compilation errors. What is the reason?

  1. V_BLOB should be initialized to EMPTY_BLOB().

  2. The WRITE routine of DBMS_LOB should be used instead of LOADFROMFILE.

  3. The return type of DBMS_LOB.FILEEXISTS is not compatible with the IF statement.

  4. OPEN, CLOSE, and READONLY routines of DBMS_LOB should be used instead of FILEOPEN, FILECLOSE, and FILE_READONLY.
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C Correct answer
Explanation

DBMS_LOB.FILEEXISTS returns a BOOLEAN value which cannot be directly used in an IF statement without proper conversion or handling. The procedure requires explicit boolean comparison or conversion to work correctly.

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