14. OCR GCSE (J277) 1.2 Data capacity calculations

Henry, Aarav, and Neha are working on a project where they need to calculate the size of a text file they are using. How can they do this?

• By multiplying the colour depth of an image by its height in pixels by its width in pixels

• By multiplying the sample rate by the duration in seconds by the bit depth

• By multiplying the number of bits it takes to store a single character by the number of characters in the text file

• By dividing the capacity of a drive by the number of files it can store

Benjamin is planning to buy a new hard drive for his computer. He wants to know, what is the unit used to measure the capacity of a drive?

• Bytes

• Gigabytes

• Bits

• Megabytes

Rohan is planning to buy an 8TB hard drive for his computer. He is curious and wants to know the capacity of this hard drive in megabytes. Can you help him?

• 8 billion

• 8 million

• 800 million

• 80 million

Aarav has a solid-state USB pen with a capacity of 256GB. He wants to store his project documents on it. If each of his documents is 0.2MB, how many documents can Aarav store on his USB pen?

• 5.12 million

• 2.56 million

• 1.28 million

• 10.24 million

Alexander, Aarav, and Leo are working on a project to create a sound file for their school presentation. They decided to use a sample rate of 6, a duration of 3 seconds, and a bit depth of 4. What would be the size of their sound file?

• 54 bits

• 72 bits

• 18 bits

• 36 bits

Aarav is working on a digital art project and wants to estimate the size of his image file. How can he do this?

• By multiplying the sample rate of his audio file by the duration in seconds by the bit depth

• By multiplying the number of bits it takes to store a single character by the number of characters in his text file

• By dividing the capacity of Ava's drive by the number of files it can store

• By multiplying the colour depth of his image by its height in pixels by its width in pixels

Benjamin is working on a digital art project. He has an image file that is 714 bits in size and the width of the image is 17 pixels. Can you help Isla and Noah figure out the height of the image in pixels?

• 12

• 14

• 10

• 16

Elsie is working on a digital art project. She has an image file that is 714 bits in size. If the height of the image is 14 pixels, can you help Samuel and Freya figure out the width of the image in pixels?

• 15

• 16

• 17

• 18

Jacob, William, and Noah are working on a digital art project. They have an image file that is 714 bits in size. The image's height is 14 pixels, and the width is 17 pixels. They are trying to figure out the colour depth of their image. Can you help them?

• 4

• 1

• 3

• 2

Amelia is writing a short story for her English class. The story contains 244 characters. If each character in her story is stored using 7 bits, what is the size of her text file?

• 168 bits

• 196 bits

• 214 bits

• 242 bits