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level: computer system and sub system

Questions and Answers List

level questions: computer system and sub system

QuestionAnswer
What is a computer system?a device which performs a task or solves a problem
What makes up a computer system?it is made up of sub-systems. These sub-systems are then made up of other sub-systems, until they only perform 1 task
What are the uses of sub-systems?used to break up whole systems to: 1. make program tidy 2. more efficient 3. makes it easier to debug
What is a top-down design?breaking down a system into smaller sub-systems until each performs only one task. This allows different programmers to work on different systems (more efficient)
What is a structure diagram?used to represent top-down design in hierarchical form
What are the uses of a flowchart? (2)1. used to represent steps of a system and sub-system in the order that they are executed
What is a library routine?a set of programming instructions for a specific task available to use
What does a library routine go through before being made available?it is debugged and tested
What is a pseudocode?a notation resembling a simplified programming language
How are pseudocodes similar to flowchart?they both are used to communicate the algorithm showing how system and sub-system work
What is a sub-routine?a set of programming instructions for a given task that forms a sub-system
What are sub-routines written in?HLL (referred as functions and procedures)
Explain standard method of solutionsSome task are needed frequently (taking square root of no). These task have standard solutions. HLL can provide standard solutions as standard functions and procedures, also library routine
What are trace tables?used to record, each change of each variable in an algorithm