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- Question
Which of the following is not true about modifying table columns?
Options- A. You can drop a column at any time.
- B. You can add a column at any time as long as it is a NULL column.
- C. You can increase the number of characters in character columns or the number of digits in numeric columns
- D. You cannot increase or decrease the number of decimal places.
- Correct Answer
- You cannot increase or decrease the number of decimal places.
- 1. What is the type of Oracle backup in which all uncommitted changes have been removed from the datafiles?
Options- A. Full backup
- B. Consistent backup
- C. Inconsistent backup
- D. Differential backup Discuss
- 2. To see the contents of the SQL*Plus buffer, type:
Options- A. CONTENTS.
- B. BUFFER.
- C. CURRENT.
- D. LIST. Discuss
- 3. You have linked SQL*Plus to an external text editor. To invoke the text editor for use within SQL*Plus, which command do you use?
Options- A. Open [FileName]
- B. Show [FileName]
- C. Alter [FileName]
- D. Edit [FileName] Discuss
- 4. When using SQL*Plus, Oracle commands, column names, table names and all other database elements:
Options- A. are case insensitive.
- B. are case sensitive.
- C. must always be in lower case.
- D. must always be in upper case. Discuss
- 5. Which of the following is not true about indexes?
Options- A. Indexes are created to enforce uniqueness on columns.
- B. Indexes are created to enable fast retrieval by column values.
- C. Columns that are frequently used with equal conditions in WHERE clauses are good candidates for indexes.
- D. Indexes are created with the ALTER TABLE command. Discuss
- 6. The default extension for an Oracle SQL*Plus file is:
Options- A. .txt.
- B. .pls.
- C. .ora.
- D. .sql. Discuss
- 7. Which prefixes are available to Oracle triggers?
Options- A. :new only
- B. :old only
- C. Both :new and :old
- D. Neither :new nor :old Discuss
- 8. In creating a procedure, you may get a message if you have compile errors. Which of the following is true?
Options- A. The line numbers reported match the line numbers you see in your text editor.
- B. SQL*Plus will automatically show the errors to you.
- C. To see the errors, enter SHOW ERRORS in SQL*Plus.
- D. If there are no syntax errors, you will receive the message "NO ERRORS." Discuss
- 9. Which of the following is NOT an Oracle-supported trigger?
Options- A. BEFORE
- B. DURING
- C. AFTER
- D. INSTEAD OF Discuss
- 10. An Oracle System Change Number (SCN):
Options- A. is a value that is incremented whenever a dirty read occurs.
- B. is incremented whenever a deadlock occurs.
- C. is a value that keeps track of explicit locks.
- D. is a value that is incremented whenever database changes are made. Discuss
Managing Databases with Oracle problems
Search Results
Correct Answer: Consistent backup
Correct Answer: LIST.
Correct Answer: Edit [FileName]
Correct Answer: are case insensitive.
Correct Answer: Indexes are created with the ALTER TABLE command.
Correct Answer: .sql.
Correct Answer: Both :new and :old
Correct Answer: To see the errors, enter SHOW ERRORS in SQL*Plus.
Correct Answer: DURING
Correct Answer: is a value that is incremented whenever database changes are made.
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