PAST PAPER 2020

Question 1

Describe the advantages of writing the program in a high-level language instead of in
assembly language (2)

Answer 1

-Easier/quicker for humans to write
* Easier/quicker to read / understand / remember
* Easier/quicker to maintain / debug / spot errors
* …because code is closer to English / uses English
words
* Less code to write
* …because one HLL instruction represents many
assembly instructions
* Portable (between processors) // will work with
different types of computer

Question 2

Give two reasons why computer scientists use hexadecimal to represent numbers instead of
binary

Answer 2

• Easier/quicker to communicate / enter / write /
  read / remember
• Less chance of input errors // easier to spot
  errors
• They are smaller / shorter
• Easy to convert between binary and
  HexadecimaL

Question 3

State what is meant by the term image resolution.

Answer 3

Number of pixels in an image