Question 1

When you store data in a computer file on a persistent storage device, what are you doing?

Accepted Answer

You are writing to the file.

Question 2

The terms directory and folder are used synonymously to refer to an entity that is used to organize files.

Accepted Answer

Both "directory" and "folder" refer to a system used to organize and store files on a computer, with "directory" being more commonly used in command-line interfaces and "folder" in graphical user interfaces.

Question 3

Files exist on devices such as hard disks, USB drives, reels of magnetic tape, and optical discs.What are these files considered to be?

Accepted Answer

These files are considered permanent files because they are stored on physical media and remain intact even when the device is powered off.

Question 4

Most computer users organize their files into directories, which are also known by what term?

Accepted Answer

Directories are commonly referred to as "folders" in computer systems, as they serve as a way to organize and store files.

Question 5

How does a C# application open a file?

Accepted Answer

A C# application opens a file by creating an object, such as a FileStream or StreamReader, and associating a stream of bytes with that object to read from or write to the file.

Question 6

The File class is contained in the System.IOFile namespace.

Accepted Answer

The File class is contained in the System.IO namespace, not System.IOFile.

Question 7

When a C# application is done using a file, what should it do with the file?

Accepted Answer

Closing the file releases the resources associated with it and ensures that any changes are properly saved and that the file is not left in an open state, which could lead to data corruption or other issues.

Question 8

When you copy data from a file on a storage device into RAM, what are you doing?

Accepted Answer

When you copy data from a file on a storage device into RAM, you are reading from the file, as you are retrieving data from storage to be used by the computer's memory.

Question 9

Permanent storage that does not lose contents when a computer loses power is known as what type of storage?

Accepted Answer

Nonvolatile storage retains data even when the computer is turned off, making it permanent storage.

Question 10

A CSV file contains values separated by semicolon delimiters.

Accepted Answer

A CSV (Comma-Separated Values) file typically contains values separated by commas, not semicolons.

Question 11

A data file is what type of file when each record is read in order of its position in the file?

Accepted Answer

A sequential access file is one where each record is read in order of its position in the file, meaning the data is accessed in a linear sequence.

Question 12

What is a collection of fields that contain data about an entity?

Accepted Answer

A record is a collection of fields that contain data about an entity, such as a person or an item.

Question 13

When you write a program and save it to a disk, you are using temporary storage.

Accepted Answer

Temporary storage refers to volatile memory like RAM, which is cleared when the computer is turned off. Saving a program to a disk involves non-volatile storage, which retains data even when the computer is powered down.

Question 14

What class contains methods that allow you to access information about files?

Accepted Answer

The File class in many programming languages, such as Java and C#, provides methods to access and manipulate information about files.

Question 15

Files are used to store data on nonvolatile memory.

Accepted Answer

Files are used to store data on nonvolatile memory, such as hard drives or SSDs, to ensure data persistence even when the device is powered off.

Question 16

What class can be used to provide information on directories or folders?

Accepted Answer

The Directory class in programming languages like C# is used to provide information about directories or folders, such as creating, moving, and enumerating through directories and subdirectories.

Question 17

Due to the fact that data can be erased from files, what term do programmers generally prefer over permanent storage?

Accepted Answer

Persistent storage refers to storage that retains data even after the program that created it has ended, unlike volatile or temporary storage which is not permanent.

Question 18

What format is used by files that store music or images?

Accepted Answer

Music and image files are typically stored in binary format, which allows for the efficient encoding of complex data such as audio and visual information.

Question 19

When you write a C# program that stores a value in a variable, you are using temporary storage; the value you store is lost when the program ends or the computer loses power.What is the name for this kind of storage?

Accepted Answer

Volatile storage refers to temporary storage, such as RAM, where data is lost when the program ends or the computer loses power.

Question 20

What term describes any one of the letters, numbers, or other special symbols (such as punctuation marks) that comprise data.

Accepted Answer

A character is any single letter, number, or symbol that is used to represent data.

Quiz 14: Files and Streams