Question: Which of these is a valid byte? Check all that apply.

Answer: 1101101100000000A byte is composed of eight bits of zeros and ones.

Question: How many possible values can we have with 8 bits?

Answer: 256. Bits use the binary system, which is also known as the base-2 numeral system. So 2^8 allows us 256 values from 0 to 255

Question: Why did UTF-8 replace the ASCII character-encoding standard?

Answer: UTF-8 can store a character in more than one byte. UTF-8 replaced the ASCII character-encoding standard because it can store a character in more than a single byte. This allowed us to represent a lot more character types, like emoji.

Question: What is the highest decimal value we can represent with a byte?

Answer: 255. There are 256 values in a byte, from the decimal number 0 to 255.

Question: The binary value of the ASCII letter "c" is 0110 0011. Using the handy chart that we learned in the lesson, convert this number to its decimal value. You'll need to use some math for this question.

Answer: 99. The decimal value 99 is same as the binary value 0110 0011. So the numbers that are turned ON are 64, 32, 2, and 1 and added up together. In other words, 64 + 32 + 2 + 1 = 99.

Question: What are the four layers of the computer architecture?

Answer: Hardware, OS, Software, User. The layers of computer architecture are the hardware, operating system, software, and user layers

Question: Write a paragraph on examples of abstraction that you encounter in your day-to-day life. For example, driving a car is an example of abstraction, you don't need to understand how a car works underneath the hood in order to drive one.

Answer: Answers vary. Mine was :The example of abstraction that I chose in my day-to-day life is TV. As an end-user, I don't know how that electricity power up the console and how all the hardware connected inside the TV to produce beautiful and watchable moving images, subtitles, sound system and whatnot. It must be really complex inside that TV.