Week 5 Reading Quiz

Which text compression technique replaces a long series of repeated characters with a count of the repetition? A. run-length encoding B. character set encoding C. keyword encoding D. Huffman encoding E. ASCII encoding

A. run-length encoding

Recording the voltage level of an audio signal at regular intervals is called what? A. sampling B. peak analysis C. pulse-code modulation D. MP3 analysis E. CD simulation

A. sampling

Which of the following is a notation that uses a name in angle brackets to annotate a piece of Web page information? A. HTML B. tag C. attribute D. markup language E. hypertext

B. tag

Which of the following is true about vector graphics? A. they represent real-world images very well B. they do not represent each pixel individually C. JPEG is a vector graphics format D. GIF is a vector graphics format E. they rely on spatial compression

B. they do not represent each pixel individually

Which Unix/Linux command will copy a file named File1.txt to File2.dat? A. copy File1.txt File2.dat B. cp file1.txt file2.dat C. None of the other answers is correct. D. copy file1.txt file2.dat

C. None of the other answers is correct

Which of the following is part of an HTML tag and provides additional information about the element? A. HTML B. tag C. attribute D. markup language E. hypertext

C. attribute

Which of the following makes use of keyframes and delta frames? A. temporal compression of audio B. spatial compression of audio C. temporal compression of video D. spatial compression of video E. audio extraction from video data

C. temporal compression of video

Which of the following characters are not represented in the ASCII character set? A. uppercase letters (A-Z) B. lowercase letters (a-z) C. punctuation such as a period or comma D. Cyrillic characters E. non-printable characters such as ESC (escape) and DEL (delete)

D. Cyrillic characters

Which of the following best describes the number of characters that can be represented in the Unicode character set? A. 256 B. 1024 C. over 10,000 D. over 65,000 E. over 100,000

D. over 65,000

Which of the following is a mechanism for publishing periodic articles on the Web? A. uniform resource locator B. web server C. web browser D. weblog E. cookie

D. weblog

Which audio format is the most popular today? A. WAV B. AU C. AIFF D. VQF E. MP3

E. MP3

Which of the following refers to the fact that the information on the Web is not organized in a linear fashion? A. HTML B. tag C. attribute D. markup language E. hypertext

E. hypertext

An easy way to look at the contents of a text file on a Unix/Linux system is to use the command show.

False

True or False? The command to delete a file named BadFile.txt on a Unix/Linux system is del BadFile.txt.

False

True or False? A video codec specifies how a movie is compressed.

False

True or False? An HTML document is divided into five primary sections.

False

True or False? An HTML document looks the same in any browser that displays it.

False

True or False? Instant messages are encrypted before they are sent.

False

True or False? Run-length encoding replaces common words with shorter symbols.

False

True or False? The ASCII character set is an international set that represents most of the world's languages.

False

True or False? The World Wide Web was developed in the 1970s.

False

For several Unix/Linux commands (such as cp or rm) the -r option stands for "recursive."

True

It is not likely that you would use the chown command, unless you are the super-user on a Unix/Linux system

True

The "wildcard" character * (i.e. the asterisk), when used in Unix/Linux commands, stands for "zero or more instances of any character."

True

The command cat cs110_file will show the contents of the file cs110_file on the screen.

True

To look at the last 15 lines of the file named cs110_file, you can use the command: tail -15 cs110_file.

True

True or False? A RGB value is made up of three values that represent the relative contributions of the primary colors red, green, and blue.

True

True or False? A browser ignores extra spaces and blank lines in an HTML document.

True

True or False? A weblog allows users to publish periodic articles on a website.

True

True or False? A website might use a cookie to determine the number of unique visitors the site has had.

True

True or False? Huffman encoding uses variable length binary strings to represent particular characters.

True

True or False? Keyword encoding is a type of text compression.

True

True or False? Network communications were possible before the development of the Web.

True

True or False? Some search engines index only part of a Web page, such as titles and headings.

True

True or False? Tags are used in a markup language to annotate the information stored in a document.

True

True or False? The MP3 audio format uses both lossy and lossless compression.

True

Unix executables do not generally have extensions such as .exe.

True