CHAPTER 10 - INPUT VALIDATION

Multiple Choice

What does the acronym GIGO stand for in computing?

• Garbage In, Garbage Out

• Great Input, Great Output

• Good Input, Good Output

• General Information, General Output

Multiple Choice

What humorous error message did the Apache web server use up to 2006?

• ID10T Error

• PEBCAK Error

• User Error

• Keyboard Error

Multiple Choice

Programs should be designed to reject bad data because:

• It reduces the need for user input.

• It allows for more complex algorithms.

• It makes the program run faster.

• It ensures data integrity and security.

Fill in the Blanks

What is the gross pay if the number of hours worked is 4000 and the hourly pay rate is 20?

Multiple Choice

If a program reads bad data as input, what will it produce as output?

• Correct output

• No output

• Unexpected behavior

• Bad output

Multiple Choice

A program should do the following if the input is invalid:

• Shut down immediately

• Provide an error message

• Ignore the input

• Process the input anyway

Fill in the Blanks

The process of ensuring that bad input is never accepted is called (all lowercase):

Multiple Select

What messages are displayed if the input score is -5 in the given pseudocode? Select 2:

• ERROR: The score cannot be less than 0

• Invalid score

• Enter the correct score

• Score cannot be negative

Multiple Choice

In the given pseudocode, what condition is checked in the while loop?

• The loop continues while a variable is equal to 1.

• The loop continues while a variable is less than 10.

• The loop continues while a variable is a negative number.

• The loop continues while a variable is greater than 5.

Multiple Choice

What is the purpose of an input validation loop as shown in the diagram?

• To ensure inputs are valid before processing

• To accept all inputs without checking

• To display outputs

• To terminate the program immediately

Multiple Choice

The program should accept 'yes' and 'no' in any combination of upper- or lowercase letters because:

• it is a standard programming practice.

• it ensures user input is flexible and user-friendly.

• it reduces the chances of errors.

• it complicates the program unnecessarily.

Multiple Choice

The purpose of validating the length of a string is to:

• Check for null values

• Encrypt the string

• Ensure it meets specific requirements

• Convert it to a different data type

Multiple Choice

Defensive programming is a practice in software development that involves:

• Writing code that anticipates and handles potential errors and issues.

• Writing code without any error handling mechanisms.

• Focusing solely on performance optimization.

• Ignoring potential errors and focusing only on the main functionality.

Multiple Choice

Which of the following is an example of an obvious input error?

• Empty Input

• Entering a string instead of an integer

• B) Negative numbers for price

• All of the above

Multiple Choice

An example of a not so obvious input error is:

• Typing in the wrong email address

• Forgetting to save a file

• Entering a wrong password

• Pressing Enter key without typing any value

Multiple Choice

For a U.S. address, what should the state abbreviation be?

• A number

• A three-character string

• Any string

• A valid two-character string

Multiple Choice

For a U.S. address, the ZIP code should be a 5- or 9-digit number. True or False?

• True

• False

Fill in the Blanks

Dates should be checked for validity. For example, the date February 29 should be accepted only in

years.