2.1.2 Thinking ahead

Question 1

2.1.2 A)
What’s does Identifying the inputs and outputs for a given situation do ?

Answer 1

Allows developers to consider problems that may arise taking these account early on

Question 2

2.1.2 A)
Identifying the inputs and outputs for a given situation

Answer 2

What is the goal ? (output)
back track to find inputs
input > process > outpit
order / method data is imputed in should be taken into account (suitable data type)

Question 3

2.1.2 B)
Determine the preconditions for devising a solution
to a problem

Answer 3

precondition - requirement that must be met be execute programs allow for safety of data meeting criteria
reduces complexity and length of program

Question 4

2.1.2 C)
What is caching
and whats the advantages

Answer 4

storing instructions or values in cache
saves time , loads without delay

Question 5

2.1.2 C)
What is prefetching

Answer 5

predicts what likely to be fetched again less time waiting

Question 6

2.1.2 C)
What is prefetching limited by

Answer 6

by accuracy of algorithm used, difficult to implicate

Question 7

2.1.2 D)
What is the need for reusable program

Answer 7

Shortens development time / cost
saves systems rescores
reduces redundant code

Question 8

2.1.2 D)
How to make a program more reusable

Answer 8

creating subroutines / functions
software libraries