3.2 - programming

Question 1

downsides of constants?

Answer 1

if value must be changed, must change value in all instances of it in program

Question 2

difference between indefinite and definite iteration?

Answer 2

indefinite = loop until condition met

definite = terminates after known amount of steps

Question 3

what is 15 mod 2

Answer 3

1 (remainder)

Question 4

what is 15 div 2

Answer 4

7 (integer division)

Question 5

sign of not equal to?

Answer 5

equal sign with cross diagonal

Question 6

command to select a particular character in a string?

Answer 6

POSITION(variable name, place)

Question 7

what is the command to select a particular part of a string?

Answer 7

SUBSTRING (variable name, begin character, end character)

Question 8

what is command to give number of characters in a string?

Answer 8

LEN (variable name)

Question 9

another word for data structures?

Answer 9

abstract data types

Question 10

what is an array?

Answer 10

a data store designed to store a set of data that is all of the same data type

Question 11

first step of writing an array?

Answer 11

declare name and how big you want it to be

ie.
array ClassList [5]

Question 12

how would writing an element in an array look?

Answer 12

ClassList [0]

Question 13

can 2D arrays have different data types?

Answer 13

no, each element must have same data type

Question 14

what would [3,1] and [0,2] be in the following array?

 0     1     2    3    4  0  30  35  32  25  22 1   29  21  29  25  28 2  27  23  32  26  19

Answer 14

25, 27

left then right

Question 15

what is a record?

Answer 15

an element in a table made up from a collection of different data types

Question 16

what kind of loop is an increment needed?

Answer 16

in a while loop, not a for loop

Question 17

what is a parameter?

Answer 17

a variable used to pass data into a subroutine

Question 18

positives of subroutines?

Answer 18

• more understandable programs

- less chance of making errors

Question 19

difference between function and procedure?

Answer 19

function returns values, procedures do not

Question 20

how do you store the output of a function?

Answer 20

assign variable to call function

FUNCTION greet( )

name1