D and F. The <CFHTTP> tag and custom tag interfaces have been exposed only through tag-based interfaces, so they cannot be used within a <CFSCRIPT> block. All the other options are accessible using functions. Remember that none of ColdFusion's services (query, HTTP, FTP, and so on) are available in a <CFSCRIPT> block.
A2:
D. A is false because the same operators are used in CFML as in <CFSCRIPT> blocks. B is false because CFML is capable of doing things that <CFSCRIPT> blocks are not (such as database queries). C is false because switch/case statements are available in both syntaxes.
A3:
D. As no break statement is used, both lines of code are executed.