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一番最新のOracle 1z1-908試験問題集PDFには2023年更新 [Q34-Q52]

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一番最新のOracle 1z1-908試験問題集PDFには2023年更新

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質問 # 34
Examine these statements, which execute successfully:
TRUNCATE test; BEGIN;
INSERT INTO test(id, name) VALUES(1, "Hello"); ROLLBACK;
SELECT id FROM test;
Which three storage engines would return a nonempty recordset for the test table when executing the statements? (Choose three.)

  • A. NDB
  • B. MyISAM
  • C. MEMORY
  • D. ARCHIVE
  • E. BLACKHOLE
  • F. InnopB

正解：A、B、E


質問 # 35
Examine this command and output:

Which two statements are true? (Choose two.)

  • A. The lock is an exclusive lock.
  • B. The lock is at the table object level.
  • C. The lock is at the metadata object level.
  • D. The lock is a shared lock.
  • E. The lock is an intentional lock.
  • F. The lock is a row-level lock.

正解：A、F


質問 # 36
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 metadata. Please use the most up to date instance: 'host1:3377'.
(RuntimeError)
Which statement is true?

  • A. The active session instance is invalid and must be re-created by using the command shell.connect ('host3:3377').
  • 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 instance deployed on host3 must be synchronized from a donor deployed on host1 by using the command cluster.addInstance('host1:3377').
  • E. The cluster is running and there is at least one ONLINE instance.

正解：D


質問 # 37
You recently upgraded your MySQL installation to MySQL 8.0.
Examine this client error:

Which option will allow this client to connect to MySQL Server?

  • A. [mysqld]
    default_authentication_plugin=mysql_native_password
  • B. [mysqld]
    default_authentication_plugin=sha256_password
  • C. [mysqld]
    default_authentication_plugin=caching_sha2_password
  • D. ALTER USER user -
    IDENTIFIED WITH caching_sha2_password
    BY 'password';
  • E. ALTER USER user -
    IDENTIFIED WITH mysql_native_password
    BY 'password';
  • F. ALTER USER user -
    IDENTIFIED WITH sha256_password -
    BY 'password';

正解：F


質問 # 38
Which two are contained in the InnoDB system tablespace (ibdata1) by default? (Chose two.)

  • A. doublewrite buffer
  • B. change buffer
  • C. table data
  • D. user privileges
  • E. primary indexes
  • F. InnoDB Data Dictionary

正解：A、F

解説：
Explanation/Reference: https://docs.oracle.com/cd/E17952_01/mysql-5.7-en/innodb-system-tablespace.html


質問 # 39
Which two methods allow a DBA to reset a user's password? (Choose two.)

  • A. ALTER USER statement
  • B. mysql_secure_installation utility
  • C. mysqladmin client program
  • D. GRANT statement
  • E. SET PASSWORD statement

正解：A、E


質問 # 40
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 INDEX (Population);
  • B. ALTER TABLE world.city ADD SPATIAL 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 INDEX (Name);
  • F. ALTER TABLE world.city ADD FULLTEXT INDEX (Population);

正解：D


質問 # 41
Which command enables rule-based MySQL Auditing capabilities?

  • A. mysql> INSTALL COMPONENT audit_log;
  • B. mysql> INSTALL PLUGIN audit_log;
  • C. shell> mysql < audit_log_filter_linux_install.sql
  • D. shell> mysqld --initialize --log-raw=audit.log

正解：C

解説：
Explanation/Reference: https://dev.mysql.com/doc/mysql-security-excerpt/5.7/en/audit-log-filtering.html


質問 # 42
Examine these entries from the general query log:

All UPDATE statements reference existing rows.
Which describes the outcome of the sequence of statements?

  • A. All statements execute without error.
  • B. A deadlock occurs after innodb_lock_wait_timeout seconds.
  • C. Connection 24 experiences a lock wait timeout.
  • D. Connection 25 experiences a lock wait timeout.
  • E. A deadlock occurs immediately.

正解：B


質問 # 43
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. *.ibdfiles
  • B. ibbackupfiles
  • C. ib_logfile*files
  • D. *.CSMfiles
  • E. *.sdifiles

正解：A、C

解説：
Explanation/Reference:
Reference: https://dev.mysql.com/doc/mysql-backup-excerpt/5.7/en/innodb-backup.html


質問 # 44
There are five MySQL instances configured with a working group replication.
Examine the output of the group members:

Which two statements are true about network partitioning in the cluster? (Choose two.)

  • A. The cluster has built-in high availability and updates group_replication_ip_whitelist to remove the unreachable nodes.
  • B. The group replication will buffer the transactions on the online nodes until the unreachable nodes return online.
  • C. There could be both a 2 node and 3 node group replication still running, so shutting down group replication and diagnosing the issue is recommended.
  • D. The cluster will shut down to preserve data consistency.
  • E. A manual intervention to force group members to be only the working two instances is required.

正解：A、D


質問 # 45
Examine this MySQL Shell command:
dba.rebootClusterFromCompleteOutage()
Which two statements are true? (Choose two.)

  • A. It is not mandatory that all instances are running and reachable before running the command.
  • B. It performs InnoDB Cluster instances rolling restart.
  • C. It picks the minimum number of instances necessary to rebuild the quorum and reconfigures InnoDB Cluster.
  • D. It stops and restarts all InnoDB Cluster instances and initializes the metadata.
  • E. It reconfigures InnoDB Cluster if the cluster was stopped.
  • F. It only starts all InnoDB Cluster instances.
  • G. It only stops and restarts all InnoDB Cluster instances.

正解：A、B


質問 # 46
t is a non-empty InnoDB table.
Examine these statements, which are executed in one session:
BEGIN;
SELECT * FROM t FOR UPDATE;
Which is true?

  • A. If ANALYZE TABLE; is invoked from the same session, it hangs until the transaction is committed or rolled back.
  • B. If OPTIMIZE LOCAL TABLE t; is invoked from another session, it executes normally and returns the status.
  • C. If OPTIMIZE TABLE; is invoked, it will create a table lock on t and force a transaction rollback.
  • D. mysqlcheck --analyze --all-databases will execute normally on all tables and return a report.

正解：B


質問 # 47
What does the binlog dump thread do?

  • A. It monitors and schedules the rotation/deletion of the binary logs.
  • B. It reads the relay log and executes the events contained in them.
  • C. It acquires a lock on the binary log for reading each event to be sent to the slave.
  • D. It connects to the master and asks it to send updates recorded in its binary logs.

正解：D


質問 # 48
Which two are features of MySQL Enterprise Firewall? (Choose two.)

  • A. recording incoming SQL statement to facilitate the creation of a whitelist of permitted commands
  • B. modifying SQL statement dynamically with substitutions
  • C. provides stateless firewall access to TCP/3306
  • D. automatic locking of user accounts who break your firewall
  • E. blocking of potential threats by configuring pre-approved whitelists

正解：A、E


質問 # 49
You must configure the MySQL command-line client to provide the highest level of trust and security when connecting to a remote MySQL Server.
Which value of --ssl-mode will do this?

  • A. VERIFY_IDENTITY
  • B. VERIFY_CA
  • C. PREFERRED
  • D. REQUIRED

正解：D


質問 # 50
Examine this command and output:

Which two statements are true? (Choose two.)

  • A. The lock is an exclusive lock.
  • B. The lock is at the metadata object level.
  • C. The lock is a row-level lock.
  • D. The lock is a shared lock.
  • E. The lock is an intentional lock.
  • F. The lock is at the table object level.

正解：A、F


質問 # 51
Which step or set of steps can be used to rotate the error log?

  • A. Rename the error log file on disk, and then execute FLUSH ERROR LOGS.
  • B. Execute SET GLOBAL log_error = ‘<new error log file>’.
  • C. Execute SET GLOBAL expire_logs_days=0to enforce a log rotation.
  • D. Execute SET GLOBAL max_error_count = <number of messages at point to rotate>.

正解：A

解説：
Explanation/Reference: https://blog.pythian.com/mysql-log-rotation/


質問 # 52
......

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PDF試験材料は2023年最新の実際に出る1z1-908問題集：https://drive.google.com/open?id=1-GYlHwab_yv-FcImda_a651JgY-z4Nzw

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