Programming
What's covered
Key facts
In AQA pseudo-code the keyword for integer division is DIV.
Authentication identifies who you are; authorisation decides what you are allowed to do.
age >= 18 AND has_ticket is true only when both conditions hold.
The ASCII code of the character '1' is 49, not the integer 1.
The five data types named on the AQA 8525 spec are integer, real, Boolean, character and string.
A format check tests that data matches an expected pattern, e.g. UK postcode LL1 1LL.
FOR i ← 1 TO 5 (inclusive both ends) runs the loop body five times.
In AQA pseudo-code, OUTPUT writes a value or string to the screen.
camelCase joins multiple words by capitalising each subsequent word's first letter, e.g. studentAge.
Deeply nested code becomes harder to read and debug; refactoring with subroutines or early returns is preferred.
Sample questions
A taste of the 250 questions in this topic — answers marked. Sign up to practise the full set with spaced repetition.
What is the value of 10 DIV 3?
- •One (the result minus two)
- •Ten (the dividend value itself)
- ✓Three (the integer part only)
- •Zero (no integer part at all)
What is the most common form of authentication?
- •A handshake captured by the computer's camera
- •A signature signed on a physical form
- ✓A username and password combination
- •A weekly emailed code sent to the user
When does an AND expression return true?
- •When at least one operand is true
- ✓When both operands are true
- •When neither operand is true at all
- •When the operands are different in value
What does ASCII let us do with characters?
- •Compress characters to reduce file size
- •Display characters in different fonts and sizes
- •Encrypt characters for secure transmission
- ✓Represent characters as numbers
Why are subroutines used when structuring a program?
- •To convert the code into binary faster
- •To make the program run more quickly
- ✓To split it into smaller reusable parts
- •To stop users entering invalid data
Name the five common AQA data types.
- •Integer, float, Boolean, array, string
- •Integer, real, binary, character, string
- •Integer, real, Boolean, character, record
- ✓Integer, real, Boolean, character, string
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