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Computer Science

GCSE · AQA

QuestionsFlashcards

Cyber Security Threats
Social Engineering
- What Social Engineering Is
  4
- Blagging, Phishing & Shouldering
  5
Malware
- What Malware Is
  2
- Viruses, Trojans & Spyware
  3
Detecting & Preventing Threats

Arithmetic Operations Flashcards

All 6 cards in this deck

What does the arithmetic operator MOD return? e.g. 11 MOD 3: The remainder after integer division.
11 MOD 3 = $2$
What does the arithmetic operator DIV return? e.g. 11 DIV 3: The whole-number part of a division (remainder discarded).
11 DIV 3 = $3$
True or false? The / operator always gives a whole-number answer.: False. / is real division and can give a decimal result, e.g. 7 / 2 = 3.5. DIV gives the whole-number part, e.g. 7 DIV 2 = 3.
True or false? In x ← 5 + 2 * 3, the multiplication is done before the addition.: True. Normal arithmetic precedence applies, so x is 11.
True or false? In IF total + 5 > 20 THEN, the comparison > is checked before the addition.: False. Arithmetic is done first, so total + 5 is worked out and then compared with 20.
How can MOD be used to test whether a whole number is even? e.g. a number stored in n: n MOD 2 = 0 is true when n is even, because an even number leaves no remainder when divided by 2.