D computational thinking

Explain why an object is an example of abstraction?

an object hides the details; yet preserves the functionality

Outline the relationship between binary and hexadecimal

While binary numbers are base2 hexadecimal numbers are base 16 (2⁴)

Each hexadecimal digit can be represented by four binary digits

State three advantages of using sub-programs in solving programming problems.

a difficult prgram can be divided into smaller parts

sub programs can be used multiple times

sub programs can be written independently of the major code

the sub program can be tested independently

easier to maintain

At the end of the day, sales transaction data is sent to the central computer at the company headquarters
What processing should be carried out at the company headquarters?

Updating inventory database

Storing transactions for later auditing

Producing reports

Re-pricing

Batch processing takes place