Data Storage and File Size Concepts

This video tutorial by Craig covers data capacity and how to calculate the size of text, sound, and image files. It explains the methods for calculating file sizes and provides examples of storing different file types on various media, such as hard drives, USB pens, and CDs. The video also delves into detailed calculations for file sizes, emphasizing the importance of understanding data capacity for GCSE exams.

What is the basic formula to calculate the size of a text file?

• Number of characters multiplied by bits per character

• Sample rate multiplied by duration

• Height multiplied by width

• Color depth multiplied by resolution

How is data capacity typically measured?

• In bytes

• In samples

• In pixels

• In characters

If a document file is 246KB, approximately how many such files can be stored on an 8TB hard drive?

• 1.28 million

• 40 million

• 3200

• 127,000

What is the storage capacity of a 256GB USB pen in megabytes?

• 256,000MB

• 8 million MB

• 640MB

• 62.9MB

How many music files of 8.4MB each can fit on a 640MB CD?

• 76

• 127,000

• 3200

• 60,000

What is the bit storage requirement for each character in the standard ASCII character set?

• 5 bits

• 6 bits

• 7 bits

• 8 bits

How do you calculate the size of a sound file?

• Number of characters multiplied by bits per character

• Resolution multiplied by color depth

• Height multiplied by width multiplied by color depth

• Sample rate multiplied by duration multiplied by bit depth

What is the formula to calculate the size of an image file?

• Resolution multiplied by bit depth

• Height multiplied by width multiplied by color depth

• Number of characters multiplied by bits per character

• Sample rate multiplied by duration

If an image has a height of 14 pixels and a width of 17 pixels with a color depth of 3, what is its size in bits?

• 714 bits

• 72 bits

• 1,708 bits

• 90 bits

What is the bit depth in the given sound file example?

• 8

• 4

• 3

• 6