1z1-908 Dumps 2021 - New Oracle 1z1-908 Exam Questions
Free 1z1-908 Braindumps Download Updated on Nov 24, 2021 with 86 Questions
NEW QUESTION 23
A colleague complains about slow response time on your website.
Examine this query and output:
What is the most likely cause for the high number of lock waits?
- A. The Innodb Buffer pool is full.
- B. You use the MyISAM storage engine for most common tables.
- C. Your table accesses wait for the operating system level flush.
- D. You use the InnoDB storage engine and statements wait while data is inserted.
Answer: D
NEW QUESTION 24
Examine this statement, which executes successfully:
You want to improve the performance of this query:
Which change enables the query to succeed while accessing fewer rows?
- A. ALTER TABLE world.city ADD SPATIAL INDEX (Name);
- B. ALTER TABLE world.city ADD INDEX (Name);
- C. ALTER TABLE world.city ADD INDEX (Population);
- D. ALTER TABLE world.city ADD FULLTEXT INDEX (Name);
- E. ALTER TABLE world.city ADD FULLTEXT INDEX (Population);
- F. ALTER TABLE world.city ADD SPATIAL INDEX (Population);
Answer: F
Explanation:
Explanation/Reference: https://dev.mysql.com/doc/refman/5.7/en/creating-spatial-indexes.html
NEW QUESTION 25
Examine this command and output:
Which two options will improve the security of the MySQL instance? (Choose two.)
- A. Change the parent directory owner and group to mysql.
- B. Remove world read privileges from the server-cert.pem certificate file.
- C. Change the group ownership of the mysql directory to the mysql user group.
- D. Remove world read privileges from the public_key.pem file.
- E. Remove group read/write privileges from the private_key.pem file.
- F. Remove the world read/execute privilege from the accounting directory.
Answer: A,C
NEW QUESTION 26
Which two commands will display indexes on the parts table in the manufacturing schema? (Choose two.)
- A. DESCRIBE manufacturing.parts;
- B. SELECT * FROM information_schema.COLUMN_STATISTICS;
- C. SHOW INDEXES FROM manufacturing.parts;
- D. EXPLAIN SELECT INDEXES FROM manufacturing.parts;
- E. SELECT * FROM information_schema.statistics WHERE table_schema='manufacturing' AND TABLE_NAME='parts';
Answer: B,E
NEW QUESTION 27
Examine the modified output:
Seconds_Behind_ Mastervalue is steadily growing.
What are two possible causes? (Choose two.)
- A. This value shows only I/O latency and is not indicative of the size of the transaction queue.
- B. The master is producing a large volume of events in parallel but the slave is processing them serially.
- C. One or more large tables do not have primary keys.
- D. The parallel slave threads are experiencing lock contention.
- E. The master is most probably too busy to transmit data and the slave needs to wait for more data.
Answer: A,B
Explanation:
Explanation
NEW QUESTION 28
Which command enables rule-based MySQL Auditing capabilities?
- A. shell> mysqld --initialize --log-raw=audit.log
- B. shell> mysql < audit_log_filter_linux_install.sql
- C. mysql> INSTALL COMPONENT audit_log;
- D. mysql> INSTALL PLUGIN audit_log;
Answer: B
NEW QUESTION 29
You must run multiple instances of MySQL Server on a single host.
Which three methods are supported? (Choose three.)
- A. Run mysqld with --datadir defined for each instance.
- B. Use systemd with different settings for each instance.
- C. Use resource groups to lock different instances on separate CPUs.
- D. Start mysqld or mysqld_safe using different option files for each instance.
- E. Use system tools to lock each instance to its own CPU.
- F. Run MySQL Server docker containers.
Answer: A,B,D
NEW QUESTION 30
User account baduser@hostname on your MySQL instance has been compromised.
Which two commands stop any new connections using the compromised account? (Choose two.)
- A. ALTER USER baduser@hostname DEFAULT ROLE NONE;
- B. ALTER USER baduser@hostname PASSWORD DISABLED;
- C. ALTER USER baduser@hostname MAX_USER_CONNECTIONS 0;
- D. ALTER USER baduser@hostname ACCOUNT LOCK;
- E. ALTER USER baduser@hostname IDENTIFIED WITH mysql_no_login;
Answer: D,E
NEW QUESTION 31
Examine this command, which executes successfully:
cluster.addInstance('<user>@<host>:<port>', {recoveryMethod: 'clone'})
Which three statements are true? (Choose three.)
- A. The account used to perform this recovery needs the BACKUP_ADMIN privilege.
- B. InnoDB redo logs must not rotate for the duration of the execution; otherwise, the recovery will fail.
- C. It is always slower than {recoveryMethod: 'incremental'}.
- D. InnoDB tablespaces outside the datadir are able to be cloned.
- E. A new instance is installed, initialized, and provisioned with data from an instance already in the cluster and joined to the cluster.
- F. A target instance must exist, then it will be provisioned with data from an instance already in the cluster and joined to the cluster.
Answer: A,B,C
NEW QUESTION 32
Which two commands will display indexes on the partstable in the manufacturing schema? (Choose two.) \
- A. DESCRIBE manufacturing.parts;
- B. SELECT * FROM information_schema.COLUMN_STATISTICS;
- C. SELECT * FROM information_schema.statistics WHERE table_schema=’manufacturing’
AND TABLE_NAME=’parts’; - D. SHOW INDEXES FROM manufacturing.parts;
- E. EXPLAIN SELECT INDEXES FROM manufacturing.parts;
Answer: B,C
Explanation:
Explanation/Reference: https://docs.oracle.com/cd/E11882_01/server.112/e40540/indexiot.htm#CNCPT912
NEW QUESTION 33
Which two MySQL Shell commands are excluded from the InnoDB Cluster creation procedure? (Choose two.)
- A. dba.configureInstance()
- B. dba.createCluster()
- C. dba.checkInstanceConfiguration()
- D. cluster.addInstance()
- E. dba.configureLocalInstance()
- F. cluster.setPrimaryInstance()
- G. cluster.forceQuorumUsingPartitionOf()
Answer: F,G
NEW QUESTION 34
Binary log events for the 'mydb1' schema must be copied to a different schema name 'mydb2'.
Which command will do this?
- A. mysqlbinlog --rewrite-db='mydb1' --rewrite-db='mydb2' | mysql
- B. mysqlbinlog --read-from-remote-server --raw | sed 's/mydb1/mydb2/g' | mysql
- C. mysqlbinlog --datebase=mydb1 --database=mydb2 | mysql
- D. mysqlbinlog --rewrite-db='mydb1->mydb2' | mysql
Answer: B
NEW QUESTION 35
Examine this SQL statement:
Which set of privileges will allow Tom to execute this SQL statement?
- A. GRANT UPDATE ON 'world'.* TO 'tom'@'%';
GRANT ALL PRIVILEGES ON 'world'.'country' TO 'tom'@'%'; - B. GRANT ALL PRIVILEGES ON 'world'.'city' TO 'tom'@'%';
GRANT SELECT ('code') ON 'world'.'country' TO 'tom'@'%'; - C. GRANT UPDATE ON 'world'.'city' TO 'tom'@'%'; GRANT SELECT ON 'world'.* TO 'tom'@'%';
- D. GRANT UPDATE ON 'world'.'city' TO 'tom'@'%'; GRANT SELECT ON 'world'.'country' TO 'tom'@'%';
Answer: D
NEW QUESTION 36
Which two are features of MySQL Enterprise Firewall? (Choose two.)
- A. blocking of potential threats by configuring pre-approved whitelists
- B. recording incoming SQL statement to facilitate the creation of a whitelist of permitted commands
- C. automatic locking of user accounts who break your firewall
- D. modifying SQL statement dynamically with substitutions
- E. provides stateless firewall access to TCP/3306
Answer: A,D
NEW QUESTION 37
An existing asynchronous replication setup is running MySQL 8.
Which two steps are a part of implementing GTID replication? (Choose two.)
- A. On the slave, alter the MySQL master connection setting with:
CHANGE MASTER TO MASTER_AUTO_POSITION = 1; - B. Enable GTID by executing this on the master and the slave:
SET GLOBAL GTID_ENABLED=on; - C. Restart MySQL (master and slave) with these options enabled:
--gtid_mode=ON
--log-bin
--log-slave-updates
--enforce-gtid-consistency - D. Execute this on the slave to enable GTID:
START SLAVE IO_THREAD WITH GTID; - E. On the slave, alter the MySQL master connection setting with:
ALTER channel CHANGE MASTER TO MASTER_AUTO_POSITION = 1; - F. Execute this on the slave to enable GTID:
RESET SLAVE; START SLAVE GTID_NEXT=AUTOMATIC;
Answer: A,C
NEW QUESTION 38
Which two are contained in the InnoDB system tablespace (ibdata1) by default? (Chose two.)
- A. table data
- B. primary indexes
- C. user privileges
- D. change buffer
- E. doublewrite buffer
- F. InnoDB Data Dictionary
Answer: E,F
NEW QUESTION 39
A user wants to connect without entering his or her username and password on the Linux command prompt.
Which three locations can be used to store the user's mysql credentials to satisfy this requirement? (Choose three.)
- A. /etc/my.cnf file
- B. $HOME/.mysql/auth/login file
- C. $HOME/.my.cnf file
- D. $HOME/.mysqlrc file
- E. DATADIR/mysqld-auto.cnf file
- F. $HOME/.mylogin.cnf file
- G. $MYSQL_HOME/my.cnf file
Answer: A,E,G
NEW QUESTION 40
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