CS105 Midterm Review

What is type of computer memory is fast and volatile (information is lost if computer power is lost)?

• Primary Memory

• RAM

• Secondary Memory

• Tertiary Memory

Answer explanation

Primary memory is usually RAM (Random Access Memory) for most computers

How many binary digits (bits) are needed to store the number 220 (the number of students in CS105)?

• 10 bits

• 2 bits

• 8 bits

• 220 bits

What is ASCII?

• A standard format for converting images to descriptive text

• A standard format for encoding characters (like letters or numbers) digitally

• A building at Stanford

• An html tag that lets you add tables to your webpage

Computer displays generate light. They shine varying amounts of Red, Green,
and Blue directly into your eyes. This is called _______ color.

• rainbow

• primary

• subtractive

• additive

What are the two ways you can add styling information to an .html file?

• By linking to an external stylesheet (.css file)

• In the .html file with <style> tags

• With a .txt file

• In the .html file outside of any tags

What is the decimal value of this byte?

00100011

• 255

• 19

• 3

• 35

What are the advantages of using a PNG image format?

• PNG works well for logos and diagrams

• PNG works well for photographs

• PNG compression is lossless

• PNG introduces compression artifacts

Answer explanation

PNG is lossless and works well for logos and diagrams because it looks for repeated sections of an image and rather than simply
repeating all the individual pixel values, it simply refers to the previous section.

In the computer, everything is represented by discrete numbers. This is what we mean when we say that computers store information as ______ data.

• analog

• bit

• raw

• digital

What two features determine the sound quality of a recording?

• MP3

• Bit Depth

• Sampling Rate

• Psychoacoustics

Which one of the following is an example of a MAC address/physical address?

• 
• 
• 
•