Data Validation Quiz
1. What is the main process that ensures data entered into a system is correct, relevant, and consistent?
Data Encoding
Data Indexing
Data Validation
Data Normalization
2. What is the primary goal of performing data validation?
To speed up data transfer
To prevent bad data from being stored or used
To encrypt sensitive information
To compress file sizes
3. Data validation is crucial for maintaining what key quality of data, which means it is accurate and reliable?
Data Redundancy
Data Abstraction
Data Structure
Data Integrity
4. What is the benefit of catching errors through validation *early*, at the point of entry?
Debugging
Error Prevention
Error Logging
System Restoration
5. Data validation helps ensure **System Stability** by preventing which problems?
System crashes or corrupting databases
High network latency or slow load times
Malware or phishing attacks
Too many file backups or duplicate data
6. Which validation check ensures the input is in the correct form, such as a number, a date, or text?
Format Check
Data Type Check
Existence Check
Consistency Check
7. Which validation check ensures a value falls within a predefined, acceptable minimum and maximum?
Presence Check
Range Check
Limit Check
Constraints Check
8. Which validation check ensures the input follows specific rules, such as a minimum or maximum character length?
Length Check
Constraints Check
Format Check
Lookup Check
9. Which validation check restricts the input to only two possible outcomes, typically 'Yes/No' or 'True/False'?
Type Check
Dual Check
Boolean Check
Option Check
10. If an age field must be a number between 0 and 150, what type of check is used to verify the upper and lower limits?
Data Type Check
Range Check
Format Check
Presence Check
11. If a password must be at least 8 characters long, what type of check is used to enforce this rule?
Range Check
Boolean Check
Constraints Check
Logic Check
12. If a user enters the word "twenty" into a field designed to hold an integer, which validation check would fail?
Constraints Check
Data Type Check
Range Check
Boolean Check
13. A checkbox asking "Do you agree to the terms?" uses which of the four main validation check techniques?
Constraints Check
Range Check
Data Type Check
Boolean Check
14. What is the general term for the steps you take based on whether a validation check was successful or not?
Post-check actions
Error logging
Debugging routines
Exception handling
15. What is the typical post-check action when the data is determined to be **valid**?
The system flags the data for review
The system accepts and saves the data
The system converts the data to a different type
The system displays a 'Success' message only
16. What is the typical post-check action when the data is determined to be **invalid**?
The system automatically corrects the data
The system deletes the data immediately
The system displays an error message and prompts the user to correct the input
The system logs the error and moves to the next field
17. How does validation help improve the **User Experience**?
By using a modern website design
By providing helpful feedback to guide them in correcting incorrect data
By reducing the number of required fields
By speeding up the network connection
18. What specific security threat can data validation help prevent by checking input for unexpected characters or commands?
Denial of Service (DoS) attacks
Brute-force attacks
Malicious data entry (e.g., SQL injection or XSS)
Session hijacking
19. What are the two possible outcomes of any single data validation process?
The system logs the input or converts the input
The system either accepts the valid data or prompts for corrections
The system encrypts the data or archives the data
The system accepts the data or sends an email alert
20. Data validation ensures the data is accurate and trustworthy for the ultimate purpose of what?
Making sound decisions
Minimizing server storage
Increasing data transmission speed
Improving code compilation time
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