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Oracle 1z0-883 Exam Questions


Vendor Name: Oracle
Certification Name:Database
Exam Name:MySQL 5.6 Database Administrator

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1z0-883 Exam Sample Questions:



What are two methods of taking a binary backup of a Mysql Server using InnoDB storage
engine?

 

Mysql Enterprise Backup

 

Mysqldump with – binary-data option

 

Mysqlhotcopy

 

File system snapshots

 

Mysqldumpslow


Mysql Enterprise Backup


Mysqldump with – binary-data option


http://dev.mysql.com/doc/refman/5.5/en/innodb-backup.html




You are creating a new server with the same accounts as an existing server. You do this by
importing a mysqldump file of the mysql database.
You test whether the import was successful by using the following commands:
Mysql> select user, host, password from mysql.user

9 rows in set (0.00 sec)
Mysql> show grants for ‘admin’@’%’;
ERROR 1141 (42000): There is no such grant defined for user ‘admin’ on host ‘%’
Which command will fix this issue?

 

CREATE USER ‘admin’ @’%’;

 

GRANT USAGE ON *.* TO ‘admin’@’%’;

 

FLUSH PRIVILEGES;

 

FLUSH HOST CACHE;

 

UPDATE mysql.user SET Create_user_priv = ‘Y’ WHERE user= ‘admin’;


FLUSH PRIVILEGES;


http://lists.mysql.com/mysql/218268




What are four capabilities of the mysql client program?

 

Creating and dropping databases

 

Creating, dropping, and modifying tables and indexes

 

Shutting down the server by using the SHUTDOWN command

 

Creating and administering users

 

Displaying replication status information


Creating and dropping databases


Creating, dropping, and modifying tables and indexes


Shutting down the server by using the SHUTDOWN command


Creating and administering users


Displaying replication status information





Mysqldump was used to create a single schema backup;
Shell> mysqldump –u root –p sakila > sakila2013.sql
Which two commands will restore the sakila database without interfering with other running
database?

 

Mysql> USE sakila; LOAD DATA INFILE ‘sakila2013.sql’;

 

Shell> mysql –u root –p sakila <sakila2013.sql

 

Shell> mysqlimport –u root –p sakila sakila2013.sql

 

Shell> mysql –u root -p –e ‘use sakila; source sakila2013.sql’

 

Shell> mysql –u root –p –silent < sakila2013.sql


Shell> mysql –u root –p sakila <sakila2013.sql


Shell> mysql –u root -p –e ‘use sakila; source sakila2013.sql’


C: If you need to restore a database that already exists, you'll need to use
mysqlimport command. The syntax for mysqlimport is as follows:
mysqlimport -u [uname] -p[pass] [dbname] [backupfile.sql]
E: Basic syntax to restore:
mysql -u root -p[root_password] [database_name] < dumpfilename.sql
Reference: How to Back Up and Restore a MySQL Database




A database exists as a read-intensive server that is operating with query_cachek_type =
DEMAND.
The database is refreshed periodically, but the resultset size of the queries does not
fluctuate.
Note the following details about this environment:
A web application uses a limited set of queries.
The Query Cache hit rate is high.
All resultsets fit into the Query Cache.
All queries are configured to use the Query Cache successfully.
The response times for queries have recently started to increase. The cause for this has
correctly been identified as the increase in the number of concurrent users accessing the
web service.
Based solely on the information provided, what is the most likely cause for this slowdown at
the database level?

 

The Query Cache is pruning queries due to an increased number of requests.

 

Query_cache_min_res_unit has been exceeded, leading to an increased performance
overhead due to additional memory block lookups.

 

Mutex contention on the Query Cache is forcing the queries to take longer due to its
single-threaded nature.

 

The average resultset of a query is increasing due to an increase in the number of users
requiring SQL statement execution.


Mutex contention on the Query Cache is forcing the queries to take longer due to its
single-threaded nature.



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