PHP Basics Quiz lec 1 to 3

What is the purpose of the concatenation operator (.) in PHP?

• To add two numbers together.

• To join two or more strings.

• To perform a comparison.

• To divide two numbers.

Which of the following is an example of a valid PHP variable name?

• $1variable

• $-variable

• $_variable

• $variable-name

What is the correct way to end a PHP statement?

• A colon (:)

• A comma (,)

• A semicolon (;)

• A period (.)

How do you print data to the browser in PHP?

• print() or echo

• write() or output()

• display() or show()

• return()

What is the primary difference between var_dump() and echo?

• echo displays a value, while var_dump() displays value and data type.

• echo is used for debugging, while var_dump() is for outputting to the browser.

• echo can only display strings, while var_dump() can display all data types.

• There is no difference.

Which of the following is an example of an associative array in PHP?

• $age = ["Peter" => 35, "Ben" => 37];

• $age = array("Peter", "Ben");

• $age = new Array("Peter", "Ben");

• $age = ("Peter", "Ben");

What will be the output of echo $x; if $x is assigned the value (int) "100.5"?

• 100.5

• 100

• "100"

• An error will occur.

Which operator is used to check for both value and data type equality?

• ==

• ===

• !=

• !==

What is the correct syntax for a multi-line comment in PHP?

• // This is a comment //

• # This is a comment #

• /* This is a comment */

• -- This is a comment

What is the main purpose of an if...else statement?

• To repeat a block of code a specific number of times.

• To perform an action based on a conditional test.

• To store multiple values in a single variable.

• To define a new function.