19. OCR GCSE (J277) 1.2 Representing characters

George, Arjun, and Priya are working on a computer science project. They need to encode the 26 letters of the alphabet into binary. How many bits would they need to represent each letter?

• 6 bits

• 3 bits

• 4 bits

• 5 bits

Muhammad, Arjun, and Ishaan are working on a project to create a new character set that can store 128 unique characters. What is the minimum number of bits they would need to store each character in their set?

• 5 bits

• 6 bits

• 7 bits

• 8 bits

Isabella, Isla, and James are working on a computer science project about character encoding. They learned about the 7-bit ASCII character set. Can you help them figure out how many characters this set can identify?

• 160 characters

• 96 characters

• 128 characters

• 64 characters

Thomas, Priya, and Sophia are working on a project to understand the history of ASCII codes. They came across an 8-bit ASCII code called Extended ASCII. Can you help them understand the purpose of Extended ASCII?

• All of the above

• It was developed to provide additional punctuation symbols

• It was created to include emojis

• It was designed to provide characters for foreign languages

Mira, Oliver, and Ava are working on a project to create a new software that can process text from every written language, historical scripts, and even modern characters such as emojis. Which character set should they use for this purpose?

• ASCII

• EBCDIC

• Extended ASCII

• Unicode

Ella is creating a website and she wants to use a variant of Unicode where the first 8 bits are the same as ASCII. Which one should she use?

• UTF-8

• UTF-16

• UTF-32

• UTF-64

Poppy, Aarav, and Jacob are working on a computer science project. They are discussing the Unicode character set. Jacob asks, 'How many bits is the current Unicode character set expressed in?'

• 24 bits

• 20 bits

• 16 bits

• 32 bits

Isla, Elsie, and Grace are working on a project where they need to express Unicode numbers in 6-digit hexadecimal. Grace wonders why they need to do this. What could be the purpose?

• To improve the performance of their computer

• To make it easier for them to refer to a particular character and their code

• To make their project compatible with ASCII

• To reduce the memory usage of their project

Rohan is working on his computer and wants to send a message to his friend Sebastian using emojis. Henry told him that a certain feature in the computer system allows this. What is the main purpose of this feature, known as a character set, in a computer system?

• To store numbers only

• To store characters and emojis

• To store images and videos

• To store audio files

Grace, Amelia, and Freya are learning about the ASCII character set in their computer science class. They came across 7 reserved numbers in the set. What was the purpose of these reserved numbers?

• They were used to store additional punctuation symbols

• They were used to represent special characters and instructions to the computer

• They were used to include emojis

• They were used to provide characters for foreign languages