Programming Languages & Integrated Development Environments (IDEs) (OCR GCSE Computer Science)

Complete the description of programming languages and translators by writing the correct term from the box in each space.

Jack writes his program in a ........................................ language. This needs to be translated into assembly or machine code before it can be executed. This is done using a translator.

One type of translator is an interpreter. This converts one line of code and then executes it, before moving to the next line. It ........................................ when an error is found, and when corrected continues running from the same position. This translator is helpful when debugging code.

A second type of translator is a compiler. This converts all of the code and produces an error report. The code will not run until there are ........................................ errors.

The ........................................ file produced can be run ........................................ the compiler.

The area of a circle is calculated using the formula π × r2 where π is equal to 3.142 and r is the radius.

A program is written to allow a user to enter the radius of a circle as a whole number between 1 and 30, then calculate and output the area of the circle.

01 radius = 0 

02 area = 0.0 

03 radius = input("Enter radius") 

04 if radius < 1 OR radius > 30 then 

05     print("Sorry, that radius is invalid") 

06 else 

07     area = 3.142 * (radius ^ 2) 

08 print (area) 

09 endif

An Integrated Development Environment (IDE) is used to write the program

Identify two features of an IDE that might be used when writing the program

Dru writes the following program using a high-level language.

01 function newscore(a,b) 

02     temp = a*b 

03     temp = temp + 1 

04     return temp 

05 endfunction 

06 score = 18 

07 name = "Dru" 

08 print (score) 

09 print ("name") 

10 print (newscore(score,2)) 

11 print (score)

Describe the advantages of writing the program in a high-level language instead of in assembly language.

A programmer creates an algorithm using a flow chart.

The algorithm is written in a high‑level language.

The high level code must be translated into machine code before a computer processor can execute it.

Describe two methods of translating high level code into machine code.

Victoria is writing a program using a high level language to display the meaning of computer science acronyms that are entered.

The code for her first attempt at this program is shown below.

01 a = input(“Enter an acronym”) 

02 if a == “LAN” then 

03     print(“Local Area Network”) 

04 elseif a == “WAN” then 

05     print(“Wide Area Network”) 

06 …………………………………………………………………………………………… 

07 …………………………………………………………………………………………… 

08 endif

Complete the code above to print out an “unknown” message if any other acronym is entered by the user.

Describe what is meant by a “high level language”.

Victoria creates a program using an Integrated Development Environment (IDE).

Describe two tools or facilities that an IDE commonly provides.

A computer game is written in a high-level programming language.

Either a compiler or an interpreter can translate the code.

Describe two differences between how a compiler and an interpreter would translate the code.

Explain the differences between low-level and high-level programming languages, and provide one advantage and one disadvantage of each

Explain why high-level languages are considered portable and give an example

Compare the memory usage implications of using a compiler versus an interpreter