What is an advantage of Bitmap images?

They can be resized and keep their quality

A 4K TV and an HD TV may have the same dimensions (e.g. 42 inch TVs) but they have different resolutions. Why is this?

The 4K has more dots per inch than the HD

The HD has more dots per inch than the 4K

The colour depth of the HD is higher

The colour depth of the 4K is higher

A bitmap image uses 1 and 0 to represent each pixel. Which of the following is true for this image?

The image is in black and white

A bitmap image uses 3 bits to represent each pixel. Which of the following is true for this image?

The image is in black and white

A bitmap image has a colour depth of 4 bits. What does this mean?

The image uses 4 bits for every pixel

The image has a resolution of 4K

What is meant by Colour Depth?

The number of colours available for each pixel

The iPhone shown on the right has a resolution of 1136 x 640 pixels. How is this an improvement on the older type of phone shown on the left?

More pixels mean a less pixelated image

When converting an analogue sound into digital, what does "sampling rate" mean?

How many samples of the sound is taken per second.

How many samples of the sound is taken per minute.

It is the gap between each of the points where the analogue sound is sampled.

It is the number of bits used for each sample.

When converting an analogue sound into digital, what does "sample size" mean?

It is the number of bits used for each sample.

How many samples of the sound is taken per second.

How many samples of the sound is taken per minute.

It is the gap between each of the points where the analogue sound is sampled.

When converting an analogue sound into digital, making the sample interval smaller will mean

More samples will be taken, therefore the sound will be closer to the analogue recording. However the file size will be larger.

Less samples will be taken, therefore the sound will be less like the analogue recording. However the file size will be smaller.

More samples will be taken, therefore the sound will be closer to the analogue recording. However the file size will be smaller.

Less samples will be taken, therefore the sound will be less like the analogue recording. However the file size will be larger.

When converting analogue sound into digital, the amplitude is measured at regular intervals. The amplitude is

The distance between two points.

The bit rate (sound) is calculated using the formula:

Frequency × bit depth × channels = bit rate

Bit depth × channels = bit rate

Frequency / bit depth × channels = bit rate

Frequency × bit depth / channels = bit rate

3.2 Data - Data representation

Authored by P Bailey

Computers

10th Grade

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42 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

ASCII stands for...

The American Standard Code for Information Interchange

The Authentic Style Code for Information Interchange

The American System Control for Information Interchange

The Authentic System Coding for Information Interchange

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the ASCII code for ... A?

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the ASCII code for ... I?

105

150

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the ASCII code for ... E represented in binary?

0100 0100

0100 1000

0100 0101

0010 0101

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Bitmap ou Vector?

Bitmap

Vector

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which resolution would give me a better quality image?

720p

1080p

480p

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Images are stored using a grid of ______.

Pixels

Dots

Bits

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3.2 Data - Data representation

ASCII stands for...

What is the ASCII code for ... A?

What is the ASCII code for ... I?

What is the ASCII code for ... E represented in binary?

Bitmap ou Vector?

Which resolution would give me a better quality image?

Images are stored using a grid of ______.

What is an advantage of Bitmap images?

How could I calculate the number of pixels in an image that has a resolution of 1920 x 1080?

Bitmap or Vector?

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