Identify four sources of data errors. What will be an ideal ...

[colton]

Identify four sources of data errors.
 
  What will be an ideal response?

Question 2

A concrete class is a class that has no direct instances, but whose descendants may have direct instances.
 
  Indicate whether the statement is true or false

[leannegxo]

Answer to Question 1

Sources of data errors include appending, truncating, transcripting, and transposing. Appending is the addition of extra characters to a field. Losing characters from a field is called truncating. Transcripting is defined as entering invalid data into a field. Transposing involves reversing the sequence of one or more characters in a field.
CL

Answer to Question 2

FALSE
Explanation: An abstract class is a class that has no direct instances but whose descendants may have direct instances.
CL

[colton]

Gracias!

[essyface1]

Excellent