WorksheetsAPCSP Unit 1 Review Quiz
Total questions: 28
Worksheet time: 56mins
What is the other name for binary
Base 10
Base 2
Base 15
Base 1
Which is larger?
Bit
Byte
Convert 00100101 to base 10.
36
37
48
27
None, this is a made up word.
Error that results when the number of bits is not enough to represent the number (like a car’s odometer “rolling over”).
syntax error
logic error
run-time error
overflow error
Error that results when the number of bits is not enough to represent the number with full precision (like using 3 digits to represent \piπpi as 3.14).
syntax error
logic error
roundoff
overflow error
What is the minimum number of bits you would need to encode the 26 letters of the alphabet plus a space -- for a total of 27 characters?
2 bits
3 bits
5 bits
6 bits
Look at the partial chart above of the ASCII values. According to ASCII character encoding, which of the following letters is represented by the 8-bit binary value: 0100 0010
ASCII Character A
ASCII Character B
ASCII Character D
The table does not contain the value presented by this binary number
With regards to black and white images, which of the following is TRUE?
A white pixel is represented by a "0" bit
"1" represents that pixel being turned on
"1" represents that pixel being turned off
The white pixel can be represented as either a "1" or a "0" bit
With regards to black and white images, which of the following is FALSE?
A black pixel is represented by a "0" bit
"0" represents that pixel being turned off
"1" represents that pixel being turned off
A white pixel is represented by the "1" bit
Which of the following is TRUE regarding lossless and lossy compressions?
An example of lossless compression is a .jpg file
Lossless uses inexact approximations while lossy does not·
You can completely reconstruct lossless but not lossy compression ·
You can completely reconstruct lossy but not lossless compression
Which of the following is TRUE regarding data compression?
Data compression is only useful for files being transmitted over the Internet
Regardless of the compression technique used, once a data file is compressed, it cannot be restored to its original size.
Sending a compressed version of a file ensures that the contents of the file cannot be intercepted by an unauthorized user.
There are trade-offs involved in choosing a compression technique for storing and transmitting data.
A student is transferring photos from her camera to her computer. The student notices that the saved photos on her computer are lower quality than the original raw photo on her camera.
Which of the following could be a possible explanation for the difference in image quality?
The saved image files were compressed with a lossy compression technique.
The saved image files were compressed with a lossless compression technique.
The saved image files were not compressed properly.
Some information is lost every time a file is saved on a computer.
Adding a bit to a binary number...
...doubles the number of values that can be represented.
...increases the number of values that can be represented by 1000.
...increases the number of values that can be represented by 2.
...squares the number of values that can be represented.
When using bits to represent fractions of a number, which of the following is TRUE?
(A) It is possible to represent all possible fractions
(B) The inability to represent numbers exactly results in roundoff errors
Both (A) and (B) are True
Both (A) and (B) are False
Which of the following would result in a better digital approximation of an analog black and white image?
Increasing the size of each sample square, thus decreasing the number of samples taken
Decreasing the size of each sample square, thus increasing the number of samples taken
Using fewer bits to represent the image.
Decreasing the size of each sample square, thus increasing the number of samples taken
Which statement about analog and digital images is true?
With advances in technology, digital images look exactly like the analog images they represent
Sampling an analog image more frequently produces a digital image with a better representation
Analog images come from data that is measured at regular intervals
Digital images come from data that is measures continuously
When referring to RGB color, if we have 3 bits to represent each color (of red, green, and blue), we would have how many color choices for each pixel?
4
8
16
32
What is the highest value you can count to using 5 bits?
15
16
31
32
