All relational databases utilize unique identifiers. Which of the following is the best term for an identifier?

• A.Key/value
• B.Record
• C.Primary key
• D.Foreign key

Comment: *

Name: *

Email: *

Verification: *

A user plugs a new scanner into a computer and turns it on. The scanner is automatically detected. However, the OS will only respond to some, but not all, of the buttons on the scanner. Which of the following steps should the user take next to enable full functionality?

• A.Roll back the device driver to a previous version.
• B.Perform a test scan on the new device to the computer.
• C.Update the computer's OS.
• D.Install any applicable software from the vendor's website.

Comment: *

Name: *

Email: *

Verification: *

Which of the following makes a file readable only by select users who possess a key?

• A.Hidden folders
• B.File permissions
• C.Compression
• D.Encryption

Comment: *

Name: *

Email: *

Verification: *

Which of the following is the main purpose for a MAC address to identify?

• A.A user
• B.A piece of hardware
• C.An IP address
• D.A network

Comment: *

Name: *

Email: *

Verification: *

A user is writing code to calculate the amount of pay for each worker at a company. The pay rate is the same for all workers. The code will use the formula:
amount_of_pay = number_of_hours × pay_rate
Which of the following should be used in the code to represent pay_rate?

• A.Object
• B.Function
• C.Constant
• D.Array

Comment: *

Name: *

Email: *

Verification: *