Sherpa

Existing user?

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

Data Types Flashcards

All 8 cards in this deck

Name the five data types used in AQA pseudo-code.: Integer, real (float), Boolean, character and string.
What data is stored by the integer data type?: A whole number, positive or negative.
e.g. 11
What data is stored by the real (float) data type?: A number that can have a decimal/fractional part.
e.g. 18.2
What data is stored by the Boolean data type?: One of two values: true or false.
What is the difference between the character and string data types?: A character is a single letter, digit or symbol; a string is a sequence of characters.
True or false? A telephone number should be stored as an integer.: False. It should be a string, because leading zeros must be kept and no arithmetic is done on it.
Why is it important to choose the correct data type for a variable?: So the data behaves as intended and the program is robust. With the wrong type, code can crash or give wrong output, e.g. "4" + "2" joins two strings to give "42" instead of adding to 6.
What is a data type?: The kind of data a variable or value holds, e.g. integer or string. It decides which values can be stored and which operations can be carried out on them.