Questions Got Wrong 2018

Question 1

Why is merge sort better than bubble

Answer 1

Has a consistent running time doesnt depend on how order original list is

Question 2

Explain why using a sub program is good

Answer 2

Decomposes program making it easier to create/design each routine tested seperately
Easier to maintain as code easier to read as code is shorter
Reuse code
Quicker to develop
Build on ezisting work

Answer 3

Title=input(“enter a title”)
Year= input(“enter a year”)
Code = librarycode(title,year)
Myfile= openwrite(“bookcodes.txt”)

Question 4

Text file for bookcode

Answer 4

Title=input(“enter a title”)
Year= input(“enter a year”)
Code = librarycode(title,year)
Myfile= openwrite(“bookcodes.txt”)
Myfile.writeline(code)
Myfile.close()

Question 5

Explain difference between ascii and extended ascii

Answer 5

Ascii uses fewer bits, extended can represent other symbols, and represents more characters

Question 6

What id a variable

Answer 6

Identidier for a memory location
Used to hold store a data, that can be changed while program is ran