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Question 21

Consider the following table data and PHP code. What is the outcome?

Table data (table name "users" with primary key "id"):

PHP code (assume the PDO connection is correctly established):

The INSERT will succeed and the user will see the "Success!" message.

The INSERT will fail because of a primary key violation, and the user will see the "Success!" message.

The INSERT will fail because of a primary key violation, and the user will see a PDO warning message.

The INSERT will fail because of a primary key violation, and the user will see the "Failure!" message.

Correct Answer: D

The provided PHP code attempts to insert a new row into the 'users' table with the primary key value '1', which already exists in the table. Since 'id' is a primary key, this action will result in a primary key violation. Upon encountering this violation, the PDOException will be caught by the catch block, where it will echo 'Failure!' and subsequently throw the exception. Hence, the user will see the 'Failure!' message.

Discussion

sjranjanOption: D

The correct answer is D

gaddour_medOption: B

B is correct execute() return true on success and false on error. no need of try catch.