PHP Advanced Quiz 5
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Quiz 5
1. What is a 'Persistent Database Connection'?
A connection that remains open for reuse by other requests
A connection that never times out
A connection used only for backups
2. What is the purpose of the 'Repository Pattern'?
To store passwords
To manage CSS files
To mediate between the domain and data mapping layers
3. What is a 'Database Transaction' in PHP/PDO?
Sending money via an API
A set of operations that are executed as a single unit
Moving a database to a new server
4. Why use 'finally' after a database try-catch block?
To ensure cleanup code runs regardless of success or failure
To double-check the data
To encrypt the final result
5. What is 'Static Analysis' in PHP?
Testing code while it is running
Analysing the speed of the server
Analyzing code for errors without executing it
6. What is the danger of passing user input to unserialize()?
It slows down the site
It can lead to PHP Object Injection and Remote Code Execution
It changes the user's password
7. Which SPL interface is used to implement the Observer pattern?
SplObserver
SplWatcher
SplListener
8. How do you implement a 'Fluent Interface' in a class?
By using static methods only
By returning '$this' from the methods
By using the 'fluent' keyword
9. What does the 'never' return type mean in PHP 8.1?
The function returns null
The function is private
The function will never return (e.g., it always throws an exception or calls exit)
10. What does the 'mixed' type hint represent?
Any type of value
Only objects and arrays
A string that contains numbers
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