part 4, patterns, algorithms and programs 1

Question 1

1. Start with an if statement
2. Use elif statements there after
3. Use an else statement as the last statement. This acts as a catch all and does not evaluate any boolean expressions

Answer 1

describe the 3 steps of using pythons elif statement

Question 2

what are the 3 steps of the formula problem pattern

Answer 2

Question 3

the first thing to think about here is what inputs are admissible

example

are only positive integers allowed

is there a minimum or maximum input value

Answer 3

when testing code what is the first thing you should think about for the test values

Question 4

by applying this pattern template to an algorithm we can implement selection between two different cases

Answer 4

what does the case analysis (two cases) pattern allow

Question 5

1. negation (NOT)
2. conjunction (AND)
3. disjunction (OR)

Answer 5

what are the three most used boolean operations

Question 6

when testing code what is the first thing you should think about for the test values

Answer 6

the first thing to think about here is what inputs are admissible

example

are only positive integers allowed

is there a minimum or maximum input value

Question 7

what is floor division

Answer 7

this divides a given number by another given number and then rounds the quotient down to the nearest integer and returns this value

Question 8

Answer 8

what are the 6 steps of the case analysis (two cases) pattern

Question 9

what are the 6 steps of the sequence generation pattern

Answer 9

Question 10

this operation finds out how many times the second number goes into the first and then returns the remainder

Answer 10

what does pythons modulus operator do

Question 11

when can we apply the formula problem pattern

Answer 11

this can be applied to an algorithm when one or more inputs can directly calculate one output

Question 12

Answer 12

name some comparison operators in python

Question 13

what are the three most used boolean operations

Answer 13

1. negation (NOT)
2. conjunction (AND)
3. disjunction (OR)

Question 14

when testing code what is the second thing you should think about

Answer 14

at this stage you should think about any borderline values and what they will be

example

was there a minimum or maximum input value

can input be positive and negative

Question 15

Answer 15

what are the 9 steps of the problem solving workflow when using pattern templates

Question 16

this divides a given number by another given number and then rounds the quotient down to the nearest integer and returns this value

Answer 16

what is floor division

Question 17

when using this. on the last else statement you should include what it will catch but comment it out

Answer 17

when using pythons elif statement what is good practice for the last else statement

Question 18

this can be applied to an algorithm when there is a value that changes with every iteration and the last iteration is unknown

Answer 18

when can we apply the sequence generation pattern to an algorithm

Question 19

what is pythons floor division operator

Answer 19

to accomplish this task use //

example

10 // 4

Question 20

when would you use pythons elif statement

Answer 20

this can be used in python when you would like to apply nested statements

Question 21

what are the 11 lines of the case analysis (nested case) pattern

Answer 21

Question 22

when can we apply the sequence generation pattern to an algorithm

Answer 22

this can be applied to an algorithm when there is a value that changes with every iteration and the last iteration is unknown

Question 23

Answer 23

what are the 3 steps of the formula problem pattern

Question 24

what are the 6 steps of the case analysis (two cases) pattern

Answer 24

Question 25

name some **comparison operators** in python

Answer 25

Question 26

what does pythons **modulus** operator do

Answer 26

this operation finds out how many times the second number goes into the first and then returns the remainder

Question 27

what are the 9 steps of the **problem solving workflow** when using pattern templates

Answer 27

Question 28

this can be used in python when you would like to apply nested statements

Answer 28

when would you use pythons **elif** statement

Question 29

when can the **case analysis (nested cases) pattern** be implemented into an algorithm

Answer 29

this can be implemented inside an algorithm when you have an input that is mutually exclusive to all other cases

Question 30

when expresssed as a problem and sub problems what are the 4 steps of the **sequence generation pattern**

Answer 30

Question 31

at this stage you should think about any **borderline values** and what they will be _example_ was there a minimum or maximum input value can input be positive and negative

Answer 31

when **testing code** what is the **second thing** you should think about

Question 32

this can be applied to an algorithm when one or more inputs can directly calculate one output

Answer 32

when can we apply the **formula problem pattern**

Question 33

when using pythons elif statement what is good practice for the last else statement

Answer 33

when using this. on the last else statement you should include what it will catch but comment it out

Question 34

Answer 34

what are the 11 lines of the **case analysis (nested case)** pattern

Question 35

what is the **syntax for pythons modulus operator**

Answer 35

to perform this operation in python use % _example_ 10 % 4 = 2 10 - 8 = 2

Question 36

to accomplish this task use // _example_ 10 // 4

Answer 36

what is **pythons floor division operator**

Question 37

Answer 37

when expresssed as a problem and sub problems what are the 4 steps of the **sequence generation pattern**

Question 38

this can be implemented inside an algorithm when you have an input that is mutually exclusive to all other cases

Answer 38

when can the **case analysis (nested cases) pattern** be implemented into an algorithm

Question 39

when **multiple boolean operators are being used within one expression** what is the best practice for writing the expression

Answer 39

the best practise here is to include brackets inside the expression. this makes it clear when reading to see the order of evaluation

Question 40

describe the 3 steps of using **pythons elif statement**

Answer 40

1. Start with an if statement 2. Use elif statements there after 3. Use an else statement as the last statement. This acts as a catch all and does not evaluate any boolean expressions

Question 41

the best practise here is to include brackets inside the expression. this makes it clear when reading to see the order of evaluation

Answer 41

when **multiple boolean operators are being used within one expression** what is the best practice for writing the expression

Question 42

to perform this operation in python use % _example_ 10 % 4 = 2 10 - 8 = 2

Answer 42

what is the **syntax for pythons modulus operator**

Question 43

what does the **case analysis (two cases)** pattern allow

Answer 43

by applying this pattern template to an algorithm we can implement selection between two different cases

Question 44

Answer 44

what are the 6 steps of the **sequence generation pattern**