OS: File Management

OS: File Management

How the OS abstracts your files

Multiple Select

In this lesson I am going to learn ... ?

• How the OS oragnises files and allocates space

• Calculate storage space required for a particular file

• How OS uses file permissions

• Select appropriate level of access

Multiple Choice

Which one of these options is NOT under the control of the OS?

• File management

• Process management

• User management

• Memory management

• Time management

Multiple Choice

What name is given to the type of file organisation shown in the diagram?

• Functional

• Structural

• Procedural

• Hierarchical

Fill in the Blanks

What special name is given to the directory at the very TOP of the file diagram?

Multiple Choice

When a hard disk is formatted a number of invisible __________ are laid down on the disk surface. ____________ divide the disk surface into areas a bit like slices of pizza. File data is divided up into ___________ and stored in these areas.

• tracks, sectors, blocks

• blocks, tracks, sectors

• sectors, tracks, blocks

• tracks, blocks, sectors

Multiple Choice

A mebibyte is 2 to the power of ____________ bytes?

• 10

• 20

• 30

• 40

Fill in the Blanks

Exactly how many bytes are there in 1 MiB?

Fill in the Blanks

Exactly how many bits are there in 1 KiB?

Multiple Choice

A hard disk allocates space using a block size of 256 bytes.

A file is 8.2 MiB in size.

Which Python expression shows how many blocks are needed to store this file?

• = math.ceil(8.2*1024*/256)

• = math.ceil(8.2*1024*1024/256)

• = (8.2*1024*1024//256)

Multiple Select

Choose all the valid operations that the OS can carry out on a file ...

• open

• execute

• print

• copy

• corrupt

Fill in the Blanks

How many subdirectories of the root directory are shown in the diagram?

Fill in the Blanks

How many files are shown in the diagram?

Fill in the Blanks

Many operating systems such as Linux treat folders as being a special type of file.

In that case, how many files are shown in the diagram?

Multiple Choice

Which one is NOT a recognised file access permission?

• read

• write

• execute

• delete

• copy

Multiple Choice

Mr Turing is a Computer Science teacher in a senior school.

Mr Gates is the IT systems manager for the school.

What levels of permission should each be given for the school's main shared folder on OneDrive?

• Turing - read

  Gates - read/write/execute

• Turing - read/write

  Gates - read

• Turing - read/write

  Gates - execute

Multiple Choice

Mr Turing is a Computer Science teacher in a senior school.

Bill Gates is a GCSE Computer Science student.

What levels of permission should each be given for the department 's main shared teaching folder on OneDrive?

• Turing - read/write/delete

  Gates - read

• Turing - read

  Gates - read/write/execute

• Turing - read/write

  Gates - read/delete

Multiple Select

In this lesson I have learned to ...

• Describe how OS organises files

• Calcu;ate storage blocks required

• Describe types of file permission and how used

Open Ended

Thinking Hard

Write three questions that this lesson so far has answered...

(press Shift+Enter to take a new line ...)

Poll

How much of this lesson have you understood?

• None of it

• Some of it

• Most of it

• All of it