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BTEC Computing Unit 1 Revision.Questions and answers are graded A+
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BTEC Computing Unit 1 Revision
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BTEC Computing Unit 1 RevisionDecomposition - answerBreaking problems down into sub-problems
Sub-problems are to be solved individually and then the solutions are to be combined to
solve the overall problem
Abstraction - answerremoving unnecesarry detail from a problem
A model is an abstraction - generalised version of a problem
Algorithmic Thinking - answerability to analyse a problem, communicate and specify a
problem. Lastly designing an algorithm
Data Types - answermeans of classifying different data:
REAL - numbers with a decimal point
INTEGER - whole number
BOOLEAN - one of two values (either true/false)
CHARACTER - a letter number or symbol in the given character set
STRING - sequence of characters
Constructs - answerSEQUENCE- all lines are executed
SELECTION - decisions made that determine the execution
ITERATION - code is repeated until condition are met
TYPES OF ITERATION - definite loop (exact number of iterations known), indefinite
loop(iterates dependent on a condition)
Variables - answerrefer to locations in the memort containing single values
Constants - answervalues that remained fixed during the program's execution
Subprogram - answer'out of line' block that performs a specific task
can be user-written or built in (libraries)
Functions - answerpass out data with return values
Local Variable - answerA variable with local scope is one that can only be seen, used
and updated by code within the same scope. Typically this means the variable was
declared (created) inside a function -- includes function parameter variables.
Global Variable - answerA variable whose scope is "global" to the program, it can be
used and updated by any part of the code. Its global scope is typically derived from the
variable being declared (created) outside of any function, object, or method.
Data Structure - answerthe conceptual arrangement of data
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