Book Image

OCA Oracle Database 11g: Database Administration I: A Real-World Certification Guide

Book Image

OCA Oracle Database 11g: Database Administration I: A Real-World Certification Guide

Overview of this book

Oracle Database Server is the most widely used relational database in the world today. This book gives you the essential skills to master the fundamentals of Oracle database administration and prepares you for Oracle DBA certification."OCA Oracle Database 11g: Database Administration I: A Real-World Certification Guide" prepares you to master the fundamentals of Oracle database administration using an example driven method that is easy to understand. The real world examples will prepare you to face the daily challenges of being a database administrator.Starting with the essentials of why databases are important in today's information technology world and how they work, you are then guided through a full, customized installation of the Oracle software and creating your own personal database. We then examine fundamental concepts of Oracle, including architecture, storage structures, security, performance tuning, networking, and instance management. Finally, we take an in-depth look at some of the most important concepts in the daily life of an Oracle DBA - backup, recovery, and data migration."OCA Oracle Database 11g: Database Administration I: A Real-World Certification Guide" provides you with the skills you need in order to become a successful Oracle DBA, both for certification and real life tasks.
Table of Contents (24 chapters)
OCA Oracle Database 11g: Database Administration I: A Real-World Certification Guide
Credits
Foreword
About the Author
About the Reviewer
www.packtpub.com
Preface
Index

Test your knowledge


Q 1. User A executes only the following statements in a table with 100 rows:

INSERT of 50 rows
COMMIT
INSERT of 10 rows
DELETE of 20 rows

If User B logs in and executes a SELECT statement that returns every row in the table, how many rows will User B see?

a. 140

b. 150

c. 160

d. 180

Q 2. What is the term that states that Oracle maintains multiple versions of the same database block at different points in time to ensure read consistency?

a. Transaction control

b. Multiplexing

c. Multiversioning

d. Atomicity

Q 3. Which type of statement does not write change vectors to the log buffer?

a. SELECT

b. INSERT

c. UPDATE

d. DELETE

Q 4. Which Oracle error is raised in situations where a query encounters an undo block that had been overwritten since the query was initiated, also known as "snapshot too old"?

a. ORA-00060

b. ORA-00600

c. ORA-1555

d. ORA-2306

Q 5. Which of the following is not a valid database parameter related to the usage of undo data?

a. undo_management

b. undo_segments

c. undo_retention...