QUESTION: 5

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?

using GRANT … REQUIRE X509 AND REQUIRE ISSUER ‘/C=…..’ AND REQUIRE SUBJECT ‘/C=…
..’
using GRANT USAGE, X509, …….ON *.* TO user@remotehost IDENTIFIED BY ‘secret_password’
using GRANT … REQUIRE SSL for a secure connection
using GRANT USAGE, SSL, …..ON *.* TO user@remotehost IDENTIFIED BY ‘secret_password’

Answer(s): A

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QUESTION: 6

What does the possible_keys column in this output denote?

if it is possible for you to include any indexes in your query
whether there are any indexes on the tables that you are querying
if there are any indexes that may be used to solve this query
whether you are using any indexes in your query

Answer(s): A

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QUESTION: 7

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.

Answer(s): C

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QUESTION: 8

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.

Answer(s): A

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