AS / A Level Computer Science

Candidates should be able to:

Show understanding of linear and binary searching

methods

Show understanding of insertion sort and bubble

sort methods

Show understanding of and use Abstract Data

Types (ADT)


Show how it is possible for ADTs to be implemented

from another ADT


Show understanding that different algorithms which

perform the same task can be compared by using

criteria (e.g. time taken to complete the task and

memory used)

Notes and guidance

Write an algorithm to implement a linear search

Write an algorithm to implement a binary search

The conditions necessary for the use of a binary

search

How the performance of a binary search varies

according to the number of data items

Write an algorithm to implement an insertion sort

Write an algorithm to implement a bubble sort

Performance of a sorting routine may depend on

the initial order of the data and the number of data

items

Write algorithms to find an item in each of the

following: linked list, binary tree

Write algorithms to insert an item into each of the

following: stack, queue, linked list, binary tree

Write algorithms to delete an item from each of the

following: stack, queue, linked list

Show understanding that a graph is an example of

an ADT. Describe the key features of a graph and

justify its use for a given situation. Candidates will

not be required to write code for a graph structure

Describe the following ADTs and demonstrate how

they can be implemented from appropriate built-

in types or other ADTs: stack, queue, linked list,

dictionary, binary tree

Including use of Big O notation to specify time and

space complexity