Free Download 1z0-888 Examp Dump: Oracle.1z0-888.BrainDumps.2018-11-26.43q.vcex

File Info

Exam	MySQL 5.7 Database Administrator
Number	1z0-888
File Name	Oracle.1z0-888.BrainDumps.2018-11-26.43q.vcex
Size	551 KB
Posted	Nov 26, 2018
Download	Oracle.1z0-888.BrainDumps.2018-11-26.43q.vcex

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Demo Questions

Question 1

Is it true that binary backups always take less space than text backups?

Yes, because binary backups only contain data, and not statements required to insert data into the tables.
No, because text backups can have optimizations, which make them smaller, such as updating many rows at once.
No, because if InnoDB tables contain many empty pages, they could take more space than the INSERT statements.
Yes, because even if InnoDB tables contain many empty pages, text backups have empty INSERT statements for them.

Correct answer: C

Question 2

You have a consistent InnoDB backup created with mysqldump, the largest table is 50 GB in size.

You start to restore your backup with this command;

shell> mysql –u root –p < backup.sql

After 30 minutes, you notice that the rate of restore seems to have slowed down. No other processes or external factors are affecting server performance.

Which is the most likely explanation for this slowdown?

The MySQL server has stopped inserting data to check index consistency.
InnoDB is doing CRC32 checks over the tablespace data as it grows.
The MySQL server is taking a periodical snapshot of data so it can resume the restore if it is interrupted mid-way.
InnoDB has filled the redo log and now must flush the pages.
Secondary indexes no longer fit into the buffer pool.

Correct answer: A

Question 3

Which three are key advantages of standard MySQL replication? (Choose three.)

supports native automatic failover
enables automatic resync of databases when discrepancies are detected
provides arbitrary geographic redundancy with minimal overhead to master
synchronously guarantees identical slave copy
is easy to configure and has low performance overhead
can easily add slaves for read scaling

Correct answer: BEF

Question 4

You are contacted by a user who does not have permission to access a database table. You determine after investigation that this user should be permitted to have access and so you execute a GRANT statement to enable the user to access the table.

Which statement describes the activation of that access for the user?

The access does not take effect until the user logs out and back in.
The access does not take effect until the next time the server is started.
The access is available immediately.
The access does not take effect until you issue the FLUSH PRIVILEGES statement.

Correct answer: C

Explanation:

Question 5

You have a MySQL replication setup and you intentionally stop the SQL thread on the slave.

What are two reasons that you may stop the SQL thread on the slave while keeping the I/O thread running? (Choose two.)

to allow the remaining events to be processed on the slave while not receiving new events from the master
to allow a backup to be created under reduced load
to allow for point-in-time recovery on the slave
to prevent schema changes from propagating to the slave before they are validated
to prevent any transaction experiencing a deadlock

Correct answer: BC

Question 6

Consider the index information for the dept_emp table in the employee’s schema:

Which two conclusions can be made based on the output of the query? (Choose two.)

There are three indexes on the table.
There is a redundant index on the dept_no column.
The secondary indexes are optimized for unique key look-ups.
The values on the emp_no column must be unique.
The selectivity of the dept_no column is the best of the indexed columns.
There is a redundant index on the emp_no column.

Correct answer: CF

Question 7

Which two statements are true about InnoDB auto-increment locking? (Choose two.)

InnoDB never uses table_level locks.
InnoDB always protects auto-increment updates with a table-level lock
InnoDB does not use locks to enforce auto-increment uniqueness.
The auto-increment lock can be a table-level lock.
Some settings for innodb_autoinc_lock_mode can help reduce locking.

Correct answer: DE

Question 8

Which three allocate memory per thread in MySQL? (Choose three.)

query cache
thread cache
read buffer
internal temporary table
sort buffer
InnoDB buffer pool instance

Correct answer: CEF

Explanation:

Reference: https://dev.mysql.com/doc/refman/5.6/en/memory-use.html

Question 9

Suppose you are adding rows to a MyISAM table and the --datadir location runs out of disk space. What will happen when this occurs?

The server will crash.
The server suspends that INSERT operation until space becomes available.
An error message will be returned to the client .Server Error: ER_IO
The server suspends operations for all storage engines until space becomes available.

Correct answer: B

Question 10

The MySQL installation includes the mysql_config_editor utility for managing login paths stored in a .mylogin.cnf file.

Which two are true about the login path feature? (Choose two.)

mysql_config_editor is the only MySQL-provided utility that can print the values stored in .mylogin.cnf.
A .mylogin.cnf file can store at most one login path.
It provides a FIPS-compliant keyring for storing MySQL login details.
A .mylogin.cnf file can be edited using a text editor, such as vim or Notepad++.
It is an alternative to storing the MySQL login details in a my.cnf file.
It provides means to help avoid accidentally exposing the MySQL login details.