NA

Correct Option: D

There are more than 80 extensions of the PHP source code. Mysql.so takes the size 42 KB, apc.so takes 655 KB, ffmpeg.so takes 35 KB, imap.so takes 86 KB, sasl.so takes 15 KB, tidy.so takes 42 KB, mysqli.so takes 107 KB, gd.so takes 94 KB.

NA

Correct Option: D

Gzip or deflate is partially supported by Netscape 4.60+. Netscape 6+, IE 4+, Opera 5+, Safari, Chrome, Lynx 2.6+ and Firefox fully support Gzip compression, IE 4.5 and 5 does not support Gzip compression, IE 5.5 and 6.0, IE 6.0 SPI, IE 6,7,8 partially support Gzip compression.

NA

Correct Option: A

A identity indicates no compression. Compress is a method that uses UNIX compress, it is based on LZW algorithm. Gzip is the most famous compression format, deflate is a kind of gzip without checksum header, it is little faster but less efficient. DNS stands for Domain Name System and is a naming system in computers.

NA

Correct Option: D

Maximum Cache size for Chrome is 300 MB, for Safari it is unlimited, For Opera 10+ it is 400 MB, for Firefox 17 the maximum cache size is 1024 MB, for Internet Explorer 6,7,8 it is 50 MB and for Internet Explorer maximum cache size is 250 MB.

NA

Correct Option: D

Parallel downloading is very beneficial to performance. Opera 10 provides the maximum parallel connections per host i.e. 8, Chrome 1 and 2, Chrome 4 to 23 gives 6 maximum parallel connections per host, Safari 3 and 4 gives 4 maximum parallel connections per host, Firefox 3, Firefox 4 to 17 gives 6 maximum parallel connections per host.