Lead4Pass 1Z0-888 Exam Dumps Real 1Z0-888 Exam Study Guide – May 2022

Lead4Pass 1Z0-888 Exam Dumps

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Question 1:

Which MySQL utility program should you use to process and sort the Slow Query Log based on query time or average query time?

A. mysqldumpslow

B. mysqldump

C. MySQL access

D. MySQL show

E. MySQL slow

Correct Answer: A

Question 2:

Consider: Which statement best describes the meaning of the value for the key_len column?

1Z0-888 free questions 2

A. It shows how many bytes will be used from each index row.

B. It shows the number of characters indexed in the key.

C. It shows the total size of the index row.

D. It shows how many columns in the index are examined.

Correct Answer: A

Question 3:

A particular government\’s security policy is to have very strict data encryption and safety settings. This is done by restricting access based on their own CA authority and limiting access to particular users within a department. Which method could be used to restrict access as required?


B. using GRANT USAGE, X509, …….ON *.* TO [email protected] IDENTIFIED BY `secret_password\’

C. using GRANT … REQUIRE SSL for a secure connection

D. using GRANT USAGE, SSL, …..ON *.* TO [email protected] IDENTIFIED BY `secret_password\’

Correct Answer: A

Question 4:

1Z0-888 free questions 4

What does the possible_keys column in this output denote?

A. if it is possible for you to include any indexes in your query

B. whether there are any indexes on the tables that you are querying

C. if there are any indexes that may be used to solve this query

D. whether you are using any indexes in your query

Correct Answer: A

Question 5:

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 restoration 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.

Correct Answer: A

Question 6:

Which two options describe how MySQL Server allocates memory? (Choose two.)

A. Each connection may have its own per-thread memory allocations.

B. Thread memory is pre-allocated up to thread_cache_size for performance.

C. Each thread allocates memory from a global pool.

D. Global memory resources are allocated at server startup.

Correct Answer: AD

Question 7:

Which three are the 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

Correct Answer: BEF

Question 8:

You are contacted by a user who does not have permission to access a database table. You determine after an 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. access is available immediately.

D. The access does not take effect until you issue the FLUSH PRIVILEGES statement.

Correct Answer: C

Question 9:

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

1Z0-888 free questions 9

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 a 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 from experiencing a deadlock

Correct Answer: BC

Question 10:

Which two methods accurately monitor the size of your total database size over time? (Choose two.)

A. monitoring the Innodb_rows_inserted status variable

B. monitoring the innodb_redo_log_size variable

C. monitoring the information_schema.TABLES table

D. monitoring data-dir size in the operating system

E. monitoring cumulative Innodb_page_size increase

F. monitoring the performance_schema_hosts_size variable

Correct Answer: CF

Question 11:

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

1Z0-888 free questions 11

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

A. There are three indexes in the table.

B. There is a redundant index on the dept_no column.

C. The secondary indexes are optimized for unique key lookups.

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.

Correct Answer: CF

Question 12:

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.

Correct Answer: DE

Question 13:

You want to create a temporary table named OLD_INVENTORY in the OLD_INVENTORY database on the master server. This table is not to be replicated on the slave server.

Which two changes would ensure that the temporary table does not propagate to the slave? (Choose two.)

A. Set binlog_format=MIXED with the –replicate-ignore-temp-table option.

B. Use the –replicate-do-db, –replicate-do-table, or –replicate-wild-do-table option with the value equal to OLD_INVENTORY.

C. Change the binlog_format option to ROW and restart myself before you create the OLD_INVENTORY table.

D. Stop SQL_THREAD on the slave until you have finished using the OLD_INVENTORY temporary table.

E. Use the –replicate-ignore-table option with the value equal to OLD_INVENTORY.OLD_INVENTORY and restart me before creating the temporary table.

Correct Answer: BE

Question 14:

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

Correct Answer: CEF

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

Question 15:

Suppose you are adding rows to a MyISAM table and the –data-dir 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.

Correct Answer: B


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