BTEC Computing Unit 1 Revision Questions and answers, 100% Accurate. Graded A+

BTEC Computing Unit 1 Revision Questions and answers, 100% Accurate. Graded A+ Decomposition - -Breaking 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 - -removing unnecesarry detail from a problem A model is an abstraction - generalised version of a problem Algorithmic Thinking - -ability to analyse a problem, communicate and specify a problem. Lastly designing an algorithm Data Types - -means 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 - -SEQUENCE- 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 - -refer to locations in the memort containing single values Constants - -values that remained fixed during the program's execution Subprogram - -'out of line' block that performs a specific task can be user-written or built in (libraries) Functions - -pass out data with return values Local Variable - -A 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