Download MySQL 5.7 Database Administrator.1z0-888.CertKiller.2019-12-23.50q.vcex

Vendor: Oracle
Exam Code: 1z0-888
Exam Name: MySQL 5.7 Database Administrator
Date: Dec 23, 2019
File Size: 1014 KB
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Demo Questions

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?
  1. mysqldumpslow
  2. mysqldump
  3. mysqlaccess
  4. mysqlshow
  5. mysqlslow
Correct answer: A
Question 2
Consider:
  
Which statement best describes the meaning of the value for the key_len column?
  1. It shows how many bytes will be used from each index row.
  2. It shows the number of characters indexed in the key.
  3. It shows the total size of the index row.
  4. It shows how many columns in the index are examined.
Correct answer: A
Question 3
Examine the mydata table and SELECT statements:
  
You issue:
mysql> begin; 
mysql> update mydata set a=0 where b=3; 
How many rows are now protected by locks with the default InnoDB configuration?
  1. one
  2. one row and a next-key lock for supremum
  3. one row and a gap-lock
  4. five
Correct answer: D
Question 4
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?
  1. using GRANT … REQUIRE X509 AND REQUIRE ISSUER ‘/C=…..’ AND REQUIRE SUBJECT ‘/C=…..’
  2. using GRANT USAGE, X509, …….ON *.* TO user@remotehost IDENTIFIED BY ‘secret_password’
  3. using GRANT … REQUIRE SSL for a secure connection
  4. using GRANT USAGE, SSL, …..ON  *.* TO user@remotehost IDENTIFIED BY ‘secret_password’
Correct answer: A
Question 5
  
What does the possible_keys column in this output denote?
  1. if it is possible for you to include any indexes in your query
  2. whether there are any indexes on the tables that you are querying
  3. if there are any indexes that may be used to solve this query
  4. whether there are any indexes in your query
Correct answer: A
Question 6
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?
  1. The MySQL server has stopped inserting data to check index consistency.
  2. InnoDB is doing CRC32 checks over the tablespace data as it grows.
  3. The MySQL server is taking a periodical snapshot of data so it can resume the restore if it is interrupted mid-way.
  4. InnoDB has filled the redo log and now must flush the pages.
  5. Secondary indexes no longer fit into the buffer pool.
Correct answer: A
Question 7
Which two options describe how MySQL Server allocates memory? (Choose two.)
  1. Each connection may have its own per-thread memory allocations.
  2. Thread memory is pre-allocated up to thread_cache_size for performance.
  3. Each thread allocates memory from a global pool.
  4. Global memory resources are allocated at server startup.
Correct answer: AD
Question 8
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?
  1. The access does not take effect until the user logs out and back in.
  2. The access does not take effect until the next time the server is started.
  3. The access is available immediately.
  4. The access does not take effect until you issue the FLUSH PRIVILEGES statement.
Correct answer: C
Question 9
Which two methods accurately monitor the size of your total database size over time? (Choose two.)
  1. monitoring the Innodb_rows_inserted status variable
  2. monitoring the innodb_redo_log_size variable
  3. monitoring the information_schema.TABLES table
  4. monitoring datadir size in the operating system
  5. monitoring cumulative Innodb_page_size increase
  6. monitoring the performance_schema_hosts_size variable
Correct answer: CF
Question 10
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.)
  1. There are three indexes on the table.
  2. There is a redundant index on the dept_no column.
  3. The secondary indexes are optimized for unique key look-ups.
  4. The values on the emp_no column must be unique.
  5. The selectivity of the dept_no column is the best of the indexed columns.
  6. There is a redundant index on the emp_no column.
Correct answer: CF
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