1.2.2 2025 - Compression & characters

What is a character set?

• A type of software

• A set of symbols that can be represented by a computer

• A computer hardware component

• A programming language

What languages does the ASCII character set cover?

• Only English letters

• English and American letters, numbers, and symbols

• All languages

• Only numbers

How many bits are used to store a single ASCII character?

• 16 bits

• 32 bits

• 7 or 8 bits

• 64 bits

What languages does the UNICODE character set cover?

• Only English

• Only numbers

• Letters, symbols, and numbers from ALL languages

• Only symbols

How many bits are used to store a single UNICODE character?

• 8 bits

• 16 bits

• 32 bits

• 64 bits

What is metadata?

• Data about data

• A type of file

• A programming language

• A computer virus

Which TWO of the following is an example of metadata?

• Image Resolution

• Geo Location of photo

• Youtube video link URL

• Folder location on a PC

How does lossy compression work?

• It breaks the data into small packets so that you dont need all of them

• It removes unnecessary / unoticable data, reducing file size

• It creates instructions to re-create a file

• It encrypts data

How does lossless compression work?

• It breaks the data into small packets so that you dont need all of them

• It removes unnecessary / unoticable data, reducing file size

• It creates instructions to re-create a file

• It encrypts data

What effect does lossy compression have on a file?

• File size increases

• File size remains the same

• File size gets smaller; quality is reduced

• File size gets larger; quality is improved