Programming

Question 1

What is the difference between high level code and machine code?

Answer 1

machine code is a stream of binary bit patterns that represent instructions, these are decoded and executed on. It is processor specific and designed with hardware in mind
high level (python) can be written by users in familiar language and works on different devices, they are translated into machine code to be executed

Question 2

What is the need for translators?

Answer 2

to convert high level into machine code

Question 3

What are the characteristics of an assembler?

Answer 3

converts assembly language into machine code

Question 4

What are the characteristics of a compiler?

Answer 4

converts high level into machine code

Question 5

What are the characteristics of an interpreter?

Answer 5

converts high level into machine code

Question 6

What are common tools and facilities available in an IDE?

Answer 6

editors, error diagnostics, run-time environment, translators, auto-documentation

Question 7

What is a sequence in an algorithm?

Answer 7

the steps the program runs through

Question 8

What is a selection in an algorithm?

Answer 8

if, then, else, case

Question 9

What is an iteration in an algorithm?

Answer 9

for, while, repeat

Question 10

What is the term variable and constant as used in an imperative language?

Answer 10

Constants are values that remain the same as the program runs, the constant identify/name is used instead of the value
Variables have an identifier/name to that corresponds to a value that can change

Question 11

What is the integer data type?

Answer 11

a whole number

Question 12

What is the real data type?

Answer 12

numbers with decimals or fractional part

Question 13

What is the Boolean data type?

Answer 13

TRUE/FALSE

Question 14

What is the character data type?

Answer 14

single alphanumerical character (not used in calculations)

Question 15

What is the string data type?

Answer 15

any number of characters in a row

Question 16

What is an array?

Answer 16

A set of variables with the same name and an index number to identify the different variables
e.g. under variable name, there would be an index so name 1 could be Harry, name 2 John all with the variable name

Question 17

What is the difference between a compiler and an interpreter?

Answer 17

Interpreter translates and executes one line at a time not whole program, has a slower run time, used in development, in distribute software users can see actual code