Deck 7: Input Validation

Question 1

Which of the following statements is true about this Boolean expression?
Score < 0 AND score > 100

A)This expression is true for numbers between 0 and 100.
B)This expression is true for numbers greater than 100.
C)This expression is true for numbers less than 0.
D)This expression would never be true.
E)None of the above

Answer 1

D

Question 2

The purpose of the __________ is to get the first input value for the validation of a loop.

A)GIGO
B)Read
C)Priming read
D)Write
E)None of the above

Answer 2

C

Question 3

Input ______________ is commonly done with a loop that iterates as long as an input variable contains bad data.

A)Check
B)Validation
C)Examination
D)Priming
E)None of the above

Answer 3

B

Question 4

What is the first step to use in detecting data type mismatch errors?

A)Read the input as a string
B)Convert to the desired data type
C)Determine whether it can be converted
D)Display error message
E)None of the above

Question 5

Accepting February 29 in only a leap year is a check that is done by a ___________ check.

A)Date
B)Day
C)Month
D)Calendar
E)None of the above

Question 6

Which of the following library functions could be used to validate that the correct data type was input for an amount of money?

A)isInteger
B)isString
C)toLower
D)isReal
E)All of the above

Question 7

What is the famous saying among computer programmers that refers to the fact that computers cannot tell the difference between good and bad data?

A)Garbage input, garbage output
B)Garbage in, garbage out
C)Garbage output is from garbage inputted
D)Garbage out is from garbage in
E)None of the above

Question 8

What type of function can be used to see if the password entered has the minimum number of characters?

A)Mathematical
B)Boolean
C)String
D)Trigonometric
E)None of the above

Question 9

If,when asked for a date of birth,the user enters a future date,this error should be caught by a ____________ check.

A)Date
B)Time
C)Day
D)Reasonableness
E)None of the above

Question 10

The priming read is placed _________ the loop.

A)Inside
B)Before
C)Below
D)Inside and before
E)Inside and below

Question 11

Which of the following is not a check for data accuracy?

A)Salary within the allowable range
B)Time measurements
C)ZIP codes in correct format and valid
D)All of the above are checks for data accuracy
E)None of the above

Question 12

If the user provides bad data as input to a program,the program will correct the data and produce output.

Question 13

In addition to using loops to validate data,_____________ can also be used to validate data.

A)String Function
B)Real Function
C)Integer Function
D)Boolean Function
E)None of the above

Question 14

Which of the following library functions could be used to simplify the process of string validation?

A)length
B)toUpper
C)isReal
D)isInteger
E)None of the above

Question 15

_______________ happens when an input operation attempts to read data,but there is no data to read.

A)No data
B)Error reading
C)Input error
D)Empty input
E)None of the above

Question 16

Which of the following is not an input validation error type?

A)Empty input
B)Incorrect data type
C)Inaccurate data
D)All of the above are input validation error types
E)None of the above

Question 17

Designing a program to avoid common errors is called _________________ programming.

A)Defensive
B)Direct
C)Defective
D)Detective
E)None of the above

Question 18

_______________ is sometimes the term used for input validation.

A)Input error
B)Error trap
C)Input trap
D)Data error
E)None of the above

Question 19

An input validation loop is sometimes called an error handler.

Question 20

Which of the following library functions could be used to validate the length of a string?

A)random
B)isString
C)length
D)toUpper
E)None of the above

Question 21

The practice of anticipating errors that can happen while a program is running and designing the program to avoid those errors is called defensive programming.

Question 22

An error trap can be performed by a(n)____________________ validation loop.

Question 23

Using a ________________ function many times would simplify the long compound Boolean expression that is used by a validation loop.

Question 24

Often a Boolean function can be used to validate data.

Question 25

Programs should be designed such that all input is inspected before it is processed and bad data is discarded.

Question 26

Checking for accuracy of data,even when the user provides the right type of data,is part of input validation.

Question 27

Input validation is not needed if the program is well designed.

Question 28

__________ programming is the practice of anticipating errors that can happen while a program is running.

Question 29

A _________ loop could be used to validate input instead of using the priming read.

Question 30

The _________________ occurs when the user presses the enter key without typing a value for an input operation.

Question 31

When using string input validation it is wise to use the library function to convert the input to upper case or lowercase so case-sensitive string comparisons can be made.

Question 32

Most programming languages do not provide library functions that can be used for input validation.

Question 33

An input validation that accepts strings in mixed case would have incorporated a case- __________ string comparison operation.

Question 34

The string _________ function plays a role in the string's validity when a minimum number of characters are required to be entered.

Question 35

To validate if the input data is a valid integer,use the __________ library function.

Question 36

The acronym ___________ is used by programmers to refer to the fact that computers cannot tell difference between good and bad data.

Question 37

Checking for reasonableness of data is programmatically impossible.

Question 38

The empty read is not an obvious input error and is a difficult one to handle.

Question 39

The input operation that is performed just before a validation loop is known as the _________.

Question 40

The priming read is needed when a pretest loop is executed.

Question 41

Programs that contain a priming read have a _________ loop.

Question 42

When a loop rejects any input except the strings "yes" and "no" then it is performing a case-___________ comparison.

Question 43

When a payroll program verifies that no value greater than 168 is entered for the number of hours worked in a week,it is performing a ___________________ check.

Question 44

After the string is read it is determined if it can be converted to the desired data type in a _____________ error.