NA

Correct Option: D

We used external JavaScript code by saving is as .js extension, we can’t use <script> tag in external JavaScript file. For using external script, we can use src attribute and put file name inside it with <script> tag.

NA

Correct Option: A

Web workers are background threads running separate scripts. All the latest browsers support web workers. Version 3.5 of web workers is introduced in Firefox, version 10.0 in Internet Explorer, version 10.6 in Opera, version 4.0 in Chrome, version 4.0 in Safari.

NA

Correct Option: A

Multi-Process Modules i.e. MPMs is introduced by Apache 2, it controls how Apache handles the requests. We can load only one MPM at a time. But in the case of Linux, we can use two MPMs. There are two kind of MPM, worker and prefork.

NA

Correct Option: D

For performing sequential scans of tables we used read_buffer_size, when reading sorted rows we use read_rnd_buffer_size, join_buffer_size are allocated per-session thus for multiple join buffers may be created. For performing sort operation we use sort_buffer_size.

NA

Correct Option: C

The option for table cache is table_open_cache. It controls the maximum number of tables that the cache can hold, we set the variable equal to the total number of table, table_definition_cache is the lightweight partner to table cache.