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Computer Science

GCSE · OCR

QuestionsFlashcards

Identifying & Preventing Threats to Computer Systems & Networks
- Forms of Attack on a Network
  8
- Methods of Preventing a Network Attack
  10

Operating Systems & Utility Software
- The Purpose & Functionality of Operating Systems
  7
- The Purpose & Functionality of Utility Software
  6

Ethical, Legal, Cultural & Environmental Impact
- Impacts of Digital Technology on Wider Society
  7
- Legislation in Computer Science
  8

Boolean Logic Diagrams
- Boolean Logic Diagrams
  9
- Combining Boolean Operators
  7

Data Types Flashcards

All 9 cards in this deck

Name the five data types you must know for OCR GCSE Computer Science.: 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.
What is casting?: Temporarily converting data from one data type to another.
e.g. int("25") converts a string to an integer.
Why is casting often needed after using input()?: input() returns a string, so it must be cast (e.g. to an integer) before it can be used in a calculation.
Which casting functions convert a value to an integer, to a real and to a string?: int(), float() / real() and str().
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.