Domain 3 Multiple Choice Practice (SD)

Match the following file modes with their descriptions.

• Mode to open a file for executing.

• Write

• Mode to open a file for appending data to the end.

• Execute

• Mode to open a file for reading.

• Append

• Mode to open a file for writing, creating the file if it does not exist.

• Read

Match the following commands with their functions.

• Command to read data from a file

• add

• Command to add numbers

• read

• Command to write data to a file

• write

• Command to add text to the end of an existing file

• append

What should information be written to in order to use it again later when an app is run?

• variable

• print

• file

• argument

Answer explanation

To reuse information later when an app runs, it should be written to a file. Unlike variables, which are temporary, files store data persistently, allowing access even after the app is closed and reopened.

Which statement ensures that a file is automatically closed after being read or written?

• open

• with

• run

• load

Answer explanation

The 'with' statement in Python ensures that a file is automatically closed after its block of code is executed, even if an error occurs. This is a best practice for file handling, making 'with' the correct choice.

What allows users to run an app in multiple ways without changing the internal code?

• functions

• libraries

• command-line arguments

• variables

Answer explanation

Command-line arguments allow users to provide input to an application at runtime, enabling different behaviors without altering the internal code. This flexibility is not offered by functions, libraries, or variables.

In Python, automatic spacing only occurs when concatenating values with:

• +

• comma

• percent

• ampersand

Answer explanation

In Python, using a comma to concatenate values automatically adds spaces between them. This is not the case with +, %, or & operators, which do not introduce spaces in the output.

Match the following actions with their purposes.

• Provides reusable code modules

• formatting

• Frees unused file objects to save memory

• threading

• Alters the appearance of text

• libraries

• Allows concurrent execution of code

• closing

What does the r+ mode allow?

• Write only

• Read only

• Read and write

• Append only

Answer explanation

The r+ mode allows both reading and writing to a file. This means you can open a file for both reading its contents and writing new data, making it versatile for file manipulation.

What do libraries provide to help users complete common tasks?

• Templates

• Built-in functions

• Styles

• Permissions

Answer explanation

Libraries provide built-in functions that simplify common tasks, allowing users to perform operations without needing to write complex code from scratch. This makes programming more efficient and accessible.

Why should unneeded files be deleted?

• To save space

• To increase speed

• To prevent errors

• To enhance security

Answer explanation

Deleting unneeded files is essential to save space on your device. This helps maintain optimal storage capacity, allowing for better performance and organization of necessary files.