Download MySQL 5-7 Database Administrator.Braindumps.1z0-888.2018-11-26.1e.43q.vcex

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Exam MySQL 5.7 Database Administrator
Number 1z0-888
File Name MySQL 5-7 Database Administrator.Braindumps.1z0-888.2018-11-26.1e.43q.vcex
Size 551 Kb
Posted November 26, 2018
Downloads 5



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Demo Questions

Question 1
Is it true that binary backups always take less space than text backups? 


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



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?

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



Question 3
Which three are key advantages of standard MySQL replication? (Choose three.)

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



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?

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



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.)

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



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.)

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



Question 7
Which two statements are true about InnoDB auto-increment locking? (Choose two.)

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



Question 8
Which three allocate memory per thread in MySQL? (Choose three.) 

  • A: query cache
  • B: thread cache
  • C: read buffer
  • D: internal temporary table
  • E: sort buffer
  • F: InnoDB buffer pool instance



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?

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



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.)

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









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