Answer:
The answer to this question is given below in the explanation section
Explanation:
First, we need to know what is abstraction and refinement.
Abstraction and refinement are used in application/system development in the field of computing. Abstraction is used to abstract the details from the model. It means that displaying only essential information about the the model and hiding other details. While refinement is the idea that is used in software development by moving through each level of abstraction and incrementally refining each level of abstraction, providing more detail at each increment. Refinement is the inverse of abstraction.
So the correct options to this question are:
- Models may be abstracted and refined depending on the goals of the project.
- Abstraction is a technique used in computational thinking.
- Refinement is the inverse of abstraction.
Answer:
The actual cost of (n) stack operations will be two ( charge for push and pop )
Explanation:
The cost of (n) stack operations involves two charges which are actual cost of operation of the stack which includes charge for pop ( poping an item into the stack) which is one and the charge for push ( pushing an item into the stack ) which is also one. and the charge for copy which is zero. therefore the maximum size of the stack operation can never exceed K because for every k operation there are k units left.
The amortized cost of the stack operation is constant 0 ( 1 ) and the cost of performing an operation on a stack made up of n elements will be assigned as 0 ( n )
<h2>The five steps of saving a document in a storage device are firstly, click File. Secondly, click Save As.</h2><h2> In addition, click Computer. Moreover, double click the storage device and type file name. Lastly, click Save or Enter.</h2>
