Unit 8 Validation and verification

Unit 8 Validation and verification

By Michael Harrington

Multiple Choice

if you take your time, read and understand all the slides here - what mark should you obtain?

• 10%

• 15%

• 20%

• 100%

Multiple Select

Which are validation checks that on in this CS course?

• Number chesk

• ASCII check

• Length check

• Format check

• Type check

Open Ended

A music app contains the following code:

INPUT age

OUTPUT "You are", age, "years old"

What is output from this program if the user enters these on 3 runs:

5, 15 ,215 ?

[note: shift & enter for a NEW LINE]

Open Ended

What is the problem with the program and how can it be fixed?

(think about sensible input only)

[note: shift & enter for a NEW LINE]

Fill in the Blanks

Which is the correct types of validation for this meaning and example?

(2 words)

Fill in the Blanks

Which is the correct types of validation for this meaning and example?

(2 words)

Fill in the Blanks

Which is the correct types of validation for this meaning and example?

(2 words)

Fill in the Blanks

Which is the correct types of validation for this meaning and example?

(2 words)

Fill in the Blanks

Which is the correct types of validation for this meaning and example?

(2 words)

​You need to be able to

Multiple Choice

What sort of validation check is made in this algorithm?

• Type check

• Presence check

• Length check

• Range check

Open Ended

Rewrite the algorithm so that the program keeps asking the user to enter a postcode until the entry is valid

[note: shift & enter for a NEW LINE]

Open Ended

Explain what the above code does?

[note: shift & enter for a NEW LINE]

Open Ended

How could you make a length check?

[note: shift & enter for a NEW LINE]

Open Ended

Format check

How could you check a username input contains only letters?

Write the code here

INPUT Username

?

?

[note: shift & enter for a NEW LINE]

​The number 38417493 has its check digit calculated by adding each number, then taking the final digit of the total found

​

In this case, the total is ? so the check digit is ?

​

Once the data is input, the check digit is generated, If it doesn’t match the number isn’t valid

​

Multiple Choice

The number 38417493 has its check digit calculated by adding each number, then taking the final digit of the total found

​

What is the check digit?

• 9

• 8

• 7

• 6

• 0

Multiple Choice

a digit that is calculated and used to confirm if a number is valid

• Type check

• Presence check

• Format check

• Check digit

• Length check

Multiple Choice

checking that data conforms to a particular format

• Type check

• Presence check

• Format check

• Check digit

• Length check

Multiple Choice

checking that data is reasonable

• Range check

• Verification

• Validation

• Check digit

• Length check

Multiple Choice

checking that data has been entered

• Type check

• Presence check

• Format check

• Check digit

• Length check

Multiple Choice

checking data is the correct data type

• Type check

• Presence check

• Format check

• Check digit

• Length check

Multiple Choice

checking the data is the correct length

• Type check

• Presence check

• Format check

• Check digit

• Length check

Multiple Choice

checking data is between two values

• Range check

• Verification

• Validation

• Check digit

• Length check

Multiple Choice

checking that data is reasonable

• Range check

• Verification

• Validation

• Check digit

• Length check

​Study this for the next question

Fill in the Blanks

The check digit is calculated as follows:

• each digit in the number is multiplied by its digit position

• the seven results are then added together

• this total is divided by 11

• the remainder gives the check digit (if the remainder = 10, the check digit is X)

(a) Calculate the check digit for the following number.

4 2 4 1 5 0 8 ?

Fill in the Blanks

The check digit is calculated as follows:

• each digit in the number is multiplied by its digit position

• the seven results are then added together

• this total is divided by 11

• the remainder gives the check digit (if the remainder = 10, the check digit is X)

(a) Calculate the check digit for the following number.

3 2 4 0 0 4 5 ?

Fill in the Blanks

Calculating the check digit - The Modulo 10 system

5 0 1 4 0 1 6 1 5 0 8 2 1

what is the value of the last ? -the check digit.