PROGRAMMING

Question 1

what are the 5 data types in programming languages

Answer 1

C - character
R - real
I - integer
B - boolean
S - string

Question 2

what is casting

Answer 2

converting between data types. e.g. string to integer

Question 3

what are the commands for casting

Answer 3

int(“1”) = converts string to integer
real(1) = converts integer (1) into a real (1.0)
bool(1) = converts integer (1) into a boolean value (True)
str(True) = converts boolean value (True) into the string (“True”)

Question 4

what are the 3 arithmetic operators that you need to know

Answer 4

** = to the power of. 2**3 =8
// = DIV 20 // 3 = 6
% = MODULO 20 % 3 =2

Question 5

what are the comparison operators

Answer 5

==, <, > , !=, <=, >=

Question 6

What 2 things can data value be stored as

Answer 6

constants or variables

Question 7

what is a constant data value

Answer 7

a constant is assigned a data value at design time and can’t be changed

Question 8

what is a variable data value

Answer 8

variable is a data value that can change value throughout the program

Question 9

what is the shape of a NOT

Answer 9

triangle and a little circle

Question 10

what is the shape of a AND

Answer 10

a rectangle with its right side being curved

Question 11

what is the shape of a OR logic gate

Answer 11

an curved arrow head

Question 12

How can you search data

Answer 12

SQL
search (what you’re looking for)
from (from where, which table?)
where (what conditions? population > 1000)

Question 13

what is the difference between procedures and functions

Answer 13

procedures don’t have to take in parameters
function has to take atleast 1 parameter

procedures don’t return a value
functions will always return a value

Question 14

what are the 2 types of variable and explain

Answer 14

local = can only be used within the structure they’re declared in
global = can be used any time after their declaration