Convert 48 to a binary number

• 110000

• 110001

• 110111

• 111111

What is the value in binary of 11001 + 2?

• 111111

• 11101

• 11100

• 11011

What is the smallest number of bits needed to store the decimal number 7?

• 1

• 2

• 3

• 4

Which math calculation could result in a roundoff error?

• 2/9

• 2*6

• 6-2

• 3+5

Many older computers were designed to handle only 8-bit systems, meaning that all numbers that the computers used could not exceed 8 bits in length. Which of the following numbers would NOT be viable in an 8-bit system?

• 14

• 34

• 255

• 256

What signal can be represented using a digital signal without losing any data?

• The human voice in air

• The varying temperature during the day

• Volume due to a train honking its horn

• The varying grades of a student during the school year

Which of the following is a trade-off inherent in lossy compression of an image?

• Smaller file size (bytes)

• Speed of transmitting file

• Image quality

• Image size (number of pixels)

An Alaskan biologist is tracking a pod (group) of whales using tracking collars. For the whales, the following geolocation data are collected at frequent intervals:

* Time

*Date

*Geographical location of the sea mammals

Which of the following questions about a whale could NOT be answered using only the data collected from the tracking collars?

• About how many miles did the animal travel in one week?

• Does the animal travel in groups with other tracked animals?

• Do the movement patterns of the animal vary according to the weather?

• In what geographic location does the animal typically travel?

Why is it usually easier to read code written in a high-level language than code written in a low-level language?

• High-level languages tend to be written by smarter people

• High-level languages tend to be closer to basic computer code, which makes them easier to translate.

• High-level languages tend to be written for more experienced programmers to use, which implicitly makes them easier to read.

• High-level languages tend to be closer to natural language by utilizing simplified abstractions with descriptive names.

What binary number represents the letter J?

• 77

• 74

• 73

• 70