The Internet Database Environment Questions and Answers

Answer: B

Correct answer: False

Plug-ins are generally small and download quickly - that is what made them practicable in the days of slow connections. The real difficulties with them lie elsewhere: they must be installed before the content will display, and they present a security surface of their own.

Answer: B

Correct answer: The transfer protocol to transfer Web pages to a browser

HTTP is the request and response protocol between a browser and a web server: the browser asks for a resource, the server returns it with a status and headers. File transfer generally is FTP’s work, and database access has protocols of its own.

Answer: B

Correct answer: Addresses the structuring and manipulation of the data involved.

XML tags describe what the content is rather than how it should look - a price is marked as a price, not as bold text. That separation of structure from presentation is the whole point: display is left to a style sheet, so the same document can be rendered differently or processed by a program that never displays it at all.

Answer: A

Correct answer: True

A servlet is a Java program held and run on the server, generating its output in response to a request. That is what distinguishes it from an applet, which is downloaded and run inside the client’s browser - and it is why a servlet can reach the database while an applet generally cannot.

Answer: D

Correct answer: Important so that the web can flourish.

Standards are what let a service written by one organisation be consumed by another it has never dealt with, which is the whole premise of web services. They are developed cooperatively by several bodies rather than led by any one, and the cooperation is what makes them worth adopting.

Answer: A

Correct answer: Allow a request from a client to access the database.

A web server on its own returns files, so anything requiring a database must be handled by a server-side extension - a CGI program, a servlet, or a scripting engine such as ASP or ColdFusion. Plain HTML pages need no such extension, which is why the answer is the database option rather than all of them.

Answer: A

Correct answer: True

XML separates structure from presentation, and XHTML is HTML recast to conform to XML’s stricter rules. The combination allows a document to be processed by a program as well as displayed, which is what makes it a plausible successor to HTML for machine-readable content.

Answer: A

Correct answer: True

The World Wide Web Consortium develops and publishes the specifications for HTML, XML, CSS and much else, and works with the IETF on HTTP. Its role is to keep the web interoperable by producing recommendations that browser makers and site authors both follow.

Answer: B

Correct answer: Both TCP and IP are needed.

The two do different halves of the job and neither replaces the other. IP addresses and routes each packet to the right machine; TCP reassembles the packets in order, detects loss and retransmits. A reliable connection needs both, which is why the pair is always named together.