Lesson details

Key learning points

  1. In this lesson, we will explore the prefixes used for measuring size, such as 'kilo-', 'mega-', 'giga-', and 'tera-'. We will revisit digital computing devices using binary digits to represent all information (including programs).

Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

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5 Questions

Q1.
In the ASCII Art shown below, every character is represented by a sequence of 8 bits. How many bytes are required for one individual character in the image?
An image in a quiz
Correct answer: 1 byte
2 bytes
3 bytes
Q2.
In this ASCII image, there are 3 lines, with 20 characters in each line.This includes spaces and the special characters that move to the next line. How many characters are in the image in total?
An image in a quiz
25 characters
50 characters
Correct answer: 60 characters
Q3.
How many bits are required for representing the entire image? Hint: each character is a byte and there are sixty characters in the ASCII image.
An image in a quiz
248 bits
Correct answer: 480 bits
600 bits
Q4.
How many bytes are required for representing the entire image?
An image in a quiz
59 bytes
Correct answer: 60 bytes
62 bytes
Q5.
You really enjoy taking pictures with your mobile phone. You purchase a 16GB memory card and you want to know how many pictures you can store on the memory card. The size of each individual picture is approximately 4MB. How many pictures can be stored on your memory card?
An image in a quiz
Correct answer: 4,000 pictures
4,200 pictures
6,000 pictures