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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

Character Codes & String Conversion Flashcards

All 4 cards in this deck

What is a string conversion (casting)?: Converting a value from one data type to another, e.g. STRING_TO_INT('25') converts the string '25' to the integer 25.
Why does keyboard input often need converting before it is used in a calculation?: In most languages keyboard input is read as a string, so it must be converted to an integer or real (e.g. with STRING_TO_INT) before arithmetic is done on it.
Which AQA pseudo-code functions convert between strings and numbers?: STRING_TO_INT and STRING_TO_REAL convert a string to a number; INT_TO_STRING and REAL_TO_STRING convert a number to a string.
What do CHAR_TO_CODE and CODE_TO_CHAR do? e.g. given that the character code for 'A' is 65: CHAR_TO_CODE('A') and CODE_TO_CHAR(66): CHAR_TO_CODE returns the character code of a character and CODE_TO_CHAR returns the character for a code, giving 65 and 'B'.