Binary Numbers
What is abstraction?
Process of reducing complexity by focusing on the main idea and disregarding irrelevant details.
How is the smoothness of analog data represented?
Sampling (measuring values of analog signals at regular intervals).
What is metadata?
Prefix meta
behind, among, between
Metadata-data about data
what are search tools?
They are used to find information that is useful
What is analog data?
Values changes smoothly over time rather than in intervals. Examples include music, color, and pitch.
What is a lossy and a lossless compression?
Lossy: The data removed is not needed or is redundant, doesn't affect the content representation.
Lossless: The loss of data (words, numbers, etc.) would affect the information.
Identifying incomplete, corrupt, duplicate, or inaccurate records. Replacing, modifying, or deleting the "dirty" data
What are spreadsheets?
They help efficiently organize and find trends in information
What are the two numbers used in binary?
0 and 1
What do the 0 and 1 represent in binary numbers?
0 represents the electrical signal being off, and 1 represents the electrical signal being on.
What is information?
The collection of facts and patterns extracted from data.
What are programs used for?
To sort and look for trends
To highlight trends
To summarize/transform data
What is the difference between a bit and a byte?
A bit is a binary digit, the smallest unit of data in computing. A byte is a group of 8 bits.
How does data compression work?
When data is compressed, you are looking for repeated patterns and predictability
What are some examples of metadata?
Author or creator, date created, size of file.
What processes do spreadsheets use?
Selection and iteration.