COPY: WJEC GCSE Digital Technology - Topic 1 MC

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27 Questions

Which of the following is true about analogue data?

It changes smoothly

What is the smallest piece of data that a computer can process or store?

Bits

Which of the following is an example of digital storage medium?

Computer hard-drives

What is the advantage of magnetic storage over other storage types?

It is low cost per gigabyte

What is the process called to convert analogue sound into digital data?

Analogue to digital conversion

What determines the quality of digital sound?

Sample rate and bit depth

Which of the following is true about bitmap images?

They have higher file sizes compared to vector images

Which of the following is a popular lossless compression type for graphics that might need to be edited?

PNG

What is the disadvantage of lossy compression for digital sound?

It permanently removes data to reduce file size and can result in lower quality sound

Which of the following is true about analogue data?

It changes smoothly and continuously

Which type of storage medium is affected by magnetic fields?

Magnetic storage

What is the advantage of solid-state storage over hard disks?

It is faster

What is the purpose of an analogue to digital converter (ADC)?

To convert analogue sound to digital sound

Which type of image is made up of pixels?

Bitmap images

What determines image resolution?

The number of pixels displayed horizontally and vertically

Which type of image compression maintains image quality but still reduces file size?

Lossless compression

Which type of file is popular for simple animated images?

GIF

What is the advantage of compressed digital sound files over uncompressed digital sound files?

Lower quality

Which of the following is true about analogue data?

It changes smoothly and continuously

Which type of storage medium is affected by magnetic fields?

Magnetic storage

What is the advantage of solid-state storage over hard disks?

It is faster

What is the purpose of an analogue to digital converter (ADC)?

To convert analogue sound to digital sound

Which type of image is made up of pixels?

Bitmap images

What determines image resolution?

The number of pixels displayed horizontally and vertically

Which type of image compression maintains image quality but still reduces file size?

Lossless compression

Which type of file is popular for simple animated images?

GIF

What is the advantage of compressed digital sound files over uncompressed digital sound files?

Lower quality

Learn about the differences between analogue and digital data, the conversion process for analogue data, the types of storage mediums including their advantages and disadvantages, as well as the conversion and compression techniques for digital sound and images.

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