What is the colour depth of this image?

How many binary digits does it take to represent this image?

If this image uses 'RGB colour', then how many bits are used to represent the colour of each pixel?

The resolution of this image is 600X400. This means that:

You check the file properties of the image and see that its size is 800kB (kilobytes). Select one or more equivalent sizes from the list below:

You calculate the representation size that this image is supposed to have. You find that the actual size of 800kB is much smaller than you expected. Use one single word to explain this.

This image of a flower has a resolution of 2,000X2,000 and its colour depth is 16 bits (this is a compact version of RGB where 5 bits are used for red and blue and 6 bits are used for green). What is the resolution of the image in megapixels?

This image of a flower has a resolution of 2,000⨉2,000 and its colour depth is 16 bits (this is a compact version of RGB where 5 bits are used for red and blue and 6 bits are used for green).

How many binary digits are required to represent the image?

Convert 64 megabits into bytes

The technical specifications of your new phone report that it has an 8-megapixel camera. What does that mean?

Select the definition that you find most appropriate for the resolution of an image:

Select the definition that you find most appropriate for the colour depth of an image:

Between two images, the one with the greater resolution: (Select all that apply)

Between two images, the one with the greater colour depth: (Select all that apply)

In this image, the colour of each pixel is either black or white. How many binary digits are required to represent the colour of each pixel?

1. The BBC Micro computer (1981) was capable of displaying images at a resolution of 600⨉256, using 3 bits to represent the colour of each pixel. 

How many bits were required to represent an image displayed on the BBC Micro?

The Commodore 64 computer (1982) had a resolution of 320X200, using 4 bits to represent the colour of each pixel. How big was the 'palette' of the Commodore 64, i.e., how many different colours was it capable of displaying?

The Commodore 64 computer (1982) had a resolution of 320⨉200, using 4 bits to represent the colour of each pixel. 

How many bits were required to represent an image displayed on the Commodore 64?

Which piece of equipment would you need to use in order to capture sound into a digital device?

Which piece of equipment would you need to use in order to generate sound from a digital device?

What is the role of the microphone?

What is the role of the speakers?

Select the definition that you find most appropriate for the sampling rate of digitised sound:

Select the definition that you find most appropriate for the sample size of digitised sound:

Between two pieces of digitised sound, all other things being equal, the one with the greater sampling rate: (Select all that apply.)

Between two pieces of digitised sound, all other things being equal, the one with the greater sample size: (Select all that apply.)

You go out into the woods to record sounds of birds. You set the sampling rate on your digital recorder to 40,000 samples per second and the sample size to 16 bits per sample. You are lucky enough to come across a nightingale, and you capture a stereo recording of its singing for 90 seconds. How many binary digits are required to represent that sound?

Which of the following is the most accurate definition of data science?

Which of the following best describes a data visualisation?

Is the following a visualisation or an infographic?

What is meant by a correlation?

The visualisation below plots life expectancy (y-axis) against time (x-axis). What type of correlation does this visualisation show from 1949 onwards?

The following graph shows the annual average temperatures recorded by a weather station over a period of 20 years. Identify the outlier in the data.

Which of the following is the correct order of the investigative cycle?

In which step of the cycle would you pose the question(s) that you will use data to help you answer?

In which step of the cycle would you cleanse the data?

In which step of the cycle would you work out where the data will come from or how you will collect it?

Someone is repeatedly trying to guess someone's password trying to gain access to their account

Repeated attempts to access the homepage of your website from multiple IP addresses. Resulting in your site going down.

A malicious application that can record information like keystrokes, website visits and document content

Malicious software that can over-load a computer with adverts and pop ups

Sending emails in an attempt to gain money or information from people due to a made up reason

You get a phone call from someone pretending to be from microsoft, they ask for your log in details and password

Soemone has downloaded a dodgy looking file, now it is on the computer, files and documents have started going missing

Your social media account is acting strange, making posts and sending messages you haven't done

A message has appeared on your screen asking you to pay money to an account otherwise your files will be deleted

One of your workers has accidentally deleted some system files

Software to help you get rid of viruses

A virtual filter that prevents harmful files getting to your computer

Which of these is a secure password

Limiting the access that different users have to the network is called

Security that uses a measurement of the human body such as fingerprint scanners are called

Prevents someone from having unlimited attempts at guessing your password

Looks like a normal un-suspecting file or program, but when opened becomes malicious

Making up a scenario to try and get information or money from someone

Using someone's social media to either gather information or try to contact them