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Digital Technologies Midterm Exam Review 15-16
Name
Class
1. Streaming audio must be completely downloaded before you can play it.
True or False (You can start listening streaming audio while still downloading.)
2. Web-based digital audio and video are often delivered in streaming format to avoid lengthy delays while the
entire audio or video file is downloaded.
True or False
3. We need a microphone and a circuit in a sound card called Analog-to-Digital Converter (ADC) to record
sound digitally.
True or False
4. Whether you acquire an image from a digital camera or a scanner, it is stored as a bitmap graphics that tend
to require very little storage space.
True or False
5. Each pixel in a monochrome bitmap grid, as illustrated in the above figure, is stored as a bit.
True or False
6. Sampling rate refers to the total number of times that sound is measured during the recording process.
True or False (It should be total number of samples per second)
7. One of the most popular digital audio formats is MP3 because it sounds better than those in CDs.
True or False
8.
A vector graphic, like the one shown in the above figure, resizes better than a comparable bitmap graphic.
True or False
9. Digital audio is music, speech, and other sounds represented in a binary format for use in digital devices.
True or False
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10. You can use a scanner to convert a printed image into a bitmap graphic.
True or False
11. More bits can encode more information. However, more bits require more computer storage.
True or False
12. The size of the file that holds a bitmap graphics depends on its resolution and ____.
a. depth (number of colors available for use in an image)
b. graphical attachment
c. megapixel ratio
d. transfer rate
13. In making digital sound, place the following events in sequences. A) A string of ones and zeroes are
encoded on a disc; B) A sound wave is sampled by an ADC; C) A sound wave is converted into an electric
signal.
a. B,A,C
b. B,C,A
c. C,A,B
d. C,B,A
14. What is the main difference between analog and digital technology?
a. Digital technology reproduces sound more faithfully than analog technology
b. Analog technology stores information as waves; digital technology stores it as strings of ones and zeroes
c. Analog technology can be used to record sound and images; digital technology can only be used to
record sound
d. Analog technology Is based on binary code; digital technology is based on electromagnets
15. Why does it take much less space to store digital information than analog information?
a. Digital devices only record pieces of sound waves, not full waves
b. Digital devices record sounds at lower volumes than analog devices
c. Digital devices decrease the amplitudes of sound waves, making them smaller
d. Digital devices automatically eliminate all background noise from the sounds they record
16. A byte is equal to
a. 4 bits, or one nibble.
b. 6 bits and one nibble.
c. 2 bits.
d. 8 bits.
17. Processing speed in microprocessor is measured in
a. gigabytes.
b. gigahertz.
c. kilobytes.
d. bits per second.
18. The most important piece of software on a personal computer is the
a. operating system.
b. utility program.
c. application program.
d. defragmenting program.
19. Which of the following is NOT a function of an operating system?
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a.
b.
c.
d.
providing a user interface
processing data
managing RAM
configuring and controlling peripheral devices
20. A small program that enables a computer to communicate with devices such as printers and monitors is a
a. driver.
b. graphical user interface (GUI).
c. speaker.
d. compiler.
21. A type of printer that produces output of exceptional quality using a technology similar to that of a
photocopy machine is the
a. ink-jet printer.
b. dot-matrix printer.
c. impact printer.
d. laser printer.
22.
describes the number of pixels in the display, or the quality of the text and graphics being
displayed, is
a. resolution.
b. density.
c. coordination.
d. element filtering.
23. The computer abbreviation “OS” stands for
a. Order of Significance
b. Open Software
c. Operating System
d. Optical Sensor
24. System software and application software are two main types of software. Which of these is NOT an
application software?
a. Microsoft Excel
b. Photoshop
c. Adobe Acrobat
d. Microsoft Windows
25. Data is temporarily (a kind of volatile memory) stored in
a. Hard Disk
b. CD-ROM
c. RAM and Cache Memory
d. Flash Memory
26. A Terabyte represents about
a. 1 quadrillion byte
b. 1 million byte
c. 1 trillion byte
d. 1 billion byte
27. The cloud allows you to ________.
a. access your email from any computer with an Internet connection
b. automatically back up your data
c. easily bring your files with you
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d. do all of the above
28. Which of the following is NOT an output device?
a. Scanner
b. Printer
c. Flat Screen
d. Touch Screen
29. Which of the following storage devices can store maximum amount of data?
a. Floppy Disk
b. Hard Disk
c. Compact Disk
d. Magneto Optic Disk
30. Which of the following have the fastest access time (the time a program or device takes to locate a single
piece of information and make it available to the computer for processing)?
a. Semiconductor Memories
b. Magnetic Disks
c. Magnetic Tapes
d. Compact Disks
31. A bit is an acronym of
a. Binary digit
b. Binary dot
c. Binary decimal
d. Binary data
.
32. Which of the following graphic format is mostly supported by web browsers?
a. .bmp
b. .jpg
c. .tiff
d. .raw
33. Computer ownership increased at a gradual pace from the late 1970s until the mid-1990s, and then it
suddenly accelerated after
a. The Internet opened for commercial use.
b. The iPod was invented.
c. The Nintendo video game was invented.
d. The CD-ROM was invented.
34. Social media is one of the major applications in cloud computing. Which of the following is NOT
considered a social networking application?
a. Facebook
b. Blogging
c. Wikis
d. E-mail
35. Which technology is used in most modern displays, including TVs and computer monitors?
a. CRT (Cathode Ray Tube)
b. LCD (Liquid Crystal Display)
c. Plasma
d. Luminescent
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36. The microphone converts the sound into
a. Electrical signals
b. GUI
c. Software
d. Mechanical signals
37. A good example of a peripheral is:
a. a mouse
b. an MP3 player
c. a scanner
d. all of the above
38. Which of the following is a type of monitor port?
a. VGA port
b. DisplayPort
c. DVI port
d. All of the above
39. If a Windows program has become unresponsive, which keys do you press to open the Task Manager?
a. Control, Alt, Delete
b. Shift, Tab, Enter
c. Home, Control, Shift
d. Space bar, F1, Tab
40. Which of the following are the best units of data on an external storage device?
a. Bits
b. Bytes
c. Clock cycles
d. Hertz
41. Which of the following device is considered to be both an input and an output device?
a. Scanner
b. Printer
c. Mouse
d. Touch Screen
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