Oct-2021 Oracle 1z1-908 Certification Real 2021 Mock Exam
1z1-908 Exam Questions and Valid PMP Dumps PDF
How to Study the Oracle 1Z0-908: MySQL 8.0 Database Exam
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- Oracle Database 12c: RAC Administration
- Oracle Database Learning Subscription
- Oracle Database 12c: Clusterware Administration and
- Oracle Database 12c: ASM Administration and
NEW QUESTION 21
Examine these entries from the general query log:
All UPDATE statements reference existing rows.
Which describes the outcome of the sequence of statements?
- A. Connection 25 experiences a lock wait timeout.
- B. A deadlock occurs after innodb_lock_wait_timeout seconds.
- C. Connection 24 experiences a lock wait timeout.
- D. All statements execute without error.
- E. A deadlock occurs immediately.
Answer: B
NEW QUESTION 22
Which command enables rule-based MySQL Auditing capabilities?
- A. shell> mysql < audit_log_filter_linux_install.sql
- B. shell> mysqld --initialize --log-raw=audit.log
- C. mysql> INSTALL COMPONENT audit_log;
- D. mysql> INSTALL PLUGIN audit_log;
Answer: A
Explanation:
Explanation/Reference: https://dev.mysql.com/doc/mysql-security-excerpt/5.7/en/audit-log-filtering.html
NEW QUESTION 23
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 FULLTEXT INDEX (Population);
- B. ALTER TABLE world.city ADD INDEX (Name);
- C. ALTER TABLE world.city ADD FULLTEXT INDEX (Name);
- D. ALTER TABLE world.city ADD SPATIAL INDEX (Population);
- E. ALTER TABLE world.city ADD SPATIAL INDEX (Name);
- F. ALTER TABLE world.city ADD INDEX (Population);
Answer: D
Explanation:
Explanation/Reference: https://dev.mysql.com/doc/refman/5.7/en/creating-spatial-indexes.html
NEW QUESTION 24
You have configured GTID-based asynchronous replication with one master and one slave.
A user accidentally updated some data on the slave.
To fix this, you stopped replication and successfully reverted the accidental changes. Examine the current GTID information:
You must fix GTID sets on the slave to avoid replicating unwanted transactions in case of failover. Which set of actions would allow the slave to continue replicating without erroneous transactions?
- A. RESET MASTER;
SET GLOBAL gtid_purged-aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-2312;
SET GLOBAL gtid_executed=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-10167; - B. SET GLOBAL gtid_purged=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-2312,bbbbbbbb- bbbb-bbbb-bbbb-bbbbbbbbbbbb:1-9; SET GLOBAL gtid_executed=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-10167;
- C. RESET SLAVE;
SET GLOBAL gtid_purged=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-3820;
SET GLOBAL gtid_executed=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-10300; - D. RESET SLAVE;
SET GLOBAL gtid_purged=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-10167; - E. RESET MASTER;
SET GLOBAL gtid_purged=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-10167;
Answer: A
NEW QUESTION 25
Which two MySQL Server accounts are locked by default? (Choose two.)
- A. any user created without a password
- B. any internal system accounts
- C. any new ROLE accounts
- D. any user created with a username, but missing the host name
- E. any user set as DEFINER for stored programs
Answer: B,E
NEW QUESTION 26
Examine this list of MySQL data directory binary logs:
binlog.000001
binlog.000002
.....
binlog.000289
binlog.000300
binlog.000301
binlog.index
Now examine this command, which executes successfully:
mysqldump --delete-master-logs --all-databases > /backup/db_backup.sql
Which two are true? (Choose two.)
- A. All databases are backed up to the output file.
- B. All non-active binary logs are removed from the master.
- C. All details regarding deleted logs and master metadata are captured in the output file.
- D. All binary logs are deleted from the master.
- E. All databases, excluding master metadata, are backed up to the output file.
- F. All binary logs are backed up and then deleted.
Answer: D,E
NEW QUESTION 27
You made some table definition changes to a schema in your MySQL Server.
Which two statements reflect how MySQL Server handles the table definition changes? (Choose two.)
- A. MySQL Server stores a copy of the serialized data in the InnoDB user tablespace.
- B. MySQL implicitly executes FLUSH TABLES and stores a snapshot backup of the metadata.
- C. The metadata is serialized in JSON format in Serialized Dictionary Information (SDI).
- D. MySQL keeps InnoDB metadata changes in .sdi files in datadir.
- E. MySQL writes SDI to the binary log for distributed backups.
Answer: A,C
NEW QUESTION 28
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. You use the InnoDB storage engine and statements wait while data is inserted.
- B. The Innodb Buffer pool is full.
- C. You use the MyISAM storage engine for most common tables.
- D. Your table accesses wait for the operating system level flush.
Answer: A
NEW QUESTION 29
Which three statements are true about MySQL replication? (Choose three.)
- A. Binary logging must be enabled on the master in order to replicate to other instances.
- B. A replication user must have the SELECT privilege for all tables that need to be replicated.
- C. Any instance can have multiple slaves, but it can have only one master.
- D. Each slave must have its own MySQL user for replication.
- E. Each instance in a replication topology must have a unique server ID.
- F. Replication can use only TCP/IP connections.
- G. Binary logs contain only transactions originating from a single MySQL instance.
Answer: A,B,E
NEW QUESTION 30
An attempt to recover an InnoDB Cluster fails.
Examine this set of messages and responses:
host3:3377 ssl JS > dba.rebootClusterFromCompleteOutage() Reconfiguring the default cluster from complete outage...
The instance 'host1:3377'' was part of the cluster configuration. Would you like to rejoin it to the cluster? [y/N]: y The instance 'host2:3377' was part of the cluster configuration. Would you like to rejoin it to the cluster? [y/N]: y Dba.rebootClusterFromCompleteOutage: The active session instance isn't the most updated in comparison with the ONLINE instances of the Cluster's metadat a. Please use the most up to date instance: 'host1:3377'. (RuntimeError) Which statement is true?
- A. The instance deployed on host3 must be synchronized from a donor deployed on host1 by using the command cluster.addInstance('host1:3377').
- B. It is possible to determine the most up-to-date instance by comparing different global transaction identifier (GTID) sets with GTID_SUBSET(set1,set2).
- C. The instance deployed on host3 must be rebuilt with a backup from the primary instance.
- D. The cluster is running and there is at least one ONLINE instance.
- E. The active session instance is invalid and must be re-created by using the command shell.connect ('host3:3377').
Answer: A
NEW QUESTION 31
Which two queries are examples of successful SQL injection attacks? (Choose two.)
- A. SELECT email,passwd FROM members
WHERE email = 'INSERT INTO members('email','passwd') VALUES ('[email protected]',
'secret');--'; - B. SELECT id, name FROM user WHERE id=23 OR id=32 OR 1=1;
- C. SELECT user,passwd FROM members
WHERE user = '?';INSERT INTO members('user','passwd') VALUES
('[email protected]','secret');--'; - D. SELECT id, name FROM user WHERE id=23 OR id=32 AND 1=1;
- E. SELECT id, name FROM user WHERE user.id=(SELECT members.id FROM members);
- F. SELECT user, phone FROM customers WHERE name = '\; DROP TABLE users; --';
Answer: A,D
NEW QUESTION 32
Which two are contained in the InnoDB system tablespace (ibdata1) by default? (Chose two.)
- A. primary indexes
- B. user privileges
- C. InnoDB Data Dictionary
- D. table data
- E. change buffer
- F. doublewrite buffer
Answer: C,F
Explanation:
Explanation/Reference: https://docs.oracle.com/cd/E17952_01/mysql-5.7-en/innodb-system-tablespace.html
NEW QUESTION 33
Examine these statements and output:
Which statement is true?
- A. The user is authenticated as the anonymous proxy user ‘’@’%’.
- B. The user failed to define a username and the connecting username defaulted to ‘’@’%’.
- C. The user is authorized as the accounting@localhostuser.
- D. The user is authorized as the rsmith@localhostuser.
- E. The user is logged in with --user=accountingas an option.
Answer: D
NEW QUESTION 34
You have a MySQL system with 500 GB of data that needs frequent backups.
You use a mix of MyISAM and InnoDB storage engines for your dat
a. Examine your backup requirement:
The MySQL system being backed up can never be unavailable or locked to the client applications.
The recovery from the backup must work on any system.
Only 1 hour of data can be lost on recovery of the backup.
Which option fulfills all backup requirements?
- A. Take a physical backup of the MySQL system.
- B. Take a logical backup of the MySQL system.
- C. Use the Clone Plugin to copy the data to another MySQL system.
- D. Take your backup from a slave of the MySQL system.
Answer: B
NEW QUESTION 35
Which two commands will display indexes on the parts table in the manufacturing schema? (Choose two.)
- A. SHOW INDEXES FROM manufacturing.parts;
- B. SELECT * FROM information_schema.statistics WHERE table_schema='manufacturing' AND TABLE_NAME='parts';
- C. SELECT * FROM information_schema.COLUMN_STATISTICS;
- D. EXPLAIN SELECT INDEXES FROM manufacturing.parts;
- E. DESCRIBE manufacturing.parts;
Answer: B,C
NEW QUESTION 36
Which three settings control global buffers shared by all threads on a MySQL server? (Choose three.)
- A. tmp_table_size
- B. table_open_cache
- C. innodb_buffer_pool_size
- D. key_buffer_size
- E. sort_buffer_size
- F. read_buffer_size
Answer: A,D,E
NEW QUESTION 37
Where is the default data directory located after installing MySQL using RPM on Oracle Linux 7?
- A. /etc/my.cnf
- B. /usr/bin
- C. /usr/mysql
- D. /usr
- E. /var/lib/mysql
Answer: B
NEW QUESTION 38
Which two statements are true about using MySQL Enterprise Monitor Query Analyzer? (Choose two.)
- A. It is possible to import data into the Query Analyzer from heterogeneous sources, such as CSV.
- B. It is possible to list and analyze statements in an arbitrary graph range selection from timeseries graphs.
- C. It is possible to configure the Query Analysis built-in advisor to get notified about slow query execution.
- D. It is possible to retrieve a normalized statement, but never the exact statement that was executed.
- E. The single query QRTi pie chart in the Query Analyzer view is based on the average execution of all statements.
Answer: B,C
NEW QUESTION 39
You execute this command:
shell> mysqlpump --exclude-databases=% --users
Which statement is true?
- A. It returns an error because the mysqldump command should have been used.
- B. It creates a logical backup of all MySQL user accounts.
- C. It creates a logical backup of only the users database.
- D. It creates a logical backup of all metadata, but contains no table data.
Answer: D
NEW QUESTION 40
You are backing up raw InnoDB files by using mysqlbackup.
Which two groups of files will be backed up during a full backup? (Choose two.)
- A. ibbackup files
- B. *.sdi files
- C. *.ibd files
- D. ib_logfile* files
- E. *.CSM files
Answer: C,D
NEW QUESTION 41
A MySQL server is monitored using MySQL Enterprise Monitor's agentless installation.
Which three features are available with this installation method? (Choose three.)
- A. disk usage and disk characteristics including disk advisors warnings
- B. operating system memory utilization
- C. security-related advisor warnings
- D. CPU utilization
- E. MySQL Replication monitoring
- F. network-related information and network characteristics
- G. MySQL Query Analysis data
Answer: A,C,G
NEW QUESTION 42
Examine this query:
What information does this query provide?
- A. total memory used by thread number 10
- B. total memory used across all connections associated with the user on connection number 10
- C. total memory used by connection number 10
- D. total memory used across all connections associated with the user on thread number 10
- E. total memory used by the first 10 connections
- F. total memory used by the first 10 threads
Answer: C
NEW QUESTION 43
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