Managing Database with Oracle Questions and Answers

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Q1
What type of failure occurs when Oracle fails due to an operating system or computer hardware failure?
  • A Application failure
  • B Instance Failure
  • C Media Failure
  • D Rollback failure
Answer: Option B
Q2
Which statement about sequences is not true?
  • A A sequence is an object that generates a sequential series of unique numbers.
  • B Sequences are most often used to provide values for surrogate keys.
  • C NextVal and CurrVal are both sequence methods.
  • D Sequences guarantee valid surrogate key values.
Answer: Option D
Q3
Which prefixes are available to Oracle triggers?
  • A :new only
  • B :old only
  • C Both :new and :old
  • D Neither :new nor :old
Answer: Option C
Q4
In creating a procedure, you may get a message if you have compile errors. Which of the following is true?
  • 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."
Answer: Option C
Q5
Which of the following is not true about indexes?
  • 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.
Answer: Option D
Q6
Which of the following is not true of SQL views?
  • A Oracle views cannot use the ORDER BY clause in view definitions.
  • B Oracle views are created using the standard SQL-92 CREATE VIEW command.
  • C Oracle views can by queried.
  • D The SQL-92 standard does not allow the use of the ORDER BY clause in view definitions
Answer: Option A
Q7
SQL*Plus will finish the statement and execute it when the user types in this:
  • A A left slash ( \ ) followed by [Enter].
  • B A colon ( : ) followed by [Enter].
  • C A semicolon ( ; ) followed by [Enter].
  • D A period ( . ) followed by [Enter].
Answer: Option C
Q8
Which of the following is NOT an Oracle-supported trigger?
  • A BEFORE
  • B DURING
  • C AFTER
  • D INSTEAD OF
Answer: Option B
Q9
After a table has been created, its structure can be modified using the SQL command:
  • A UPDATE TABLE [TableName].
  • B MODIFY TABLE [TableName].
  • C ALTER TABLE [TableName].
  • D CHANGE TABLE [TableName].
Answer: Option C
Q10
Which of the following is not true about modifying table columns?
  • 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.
Answer: Option D

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