MCQs On Class 1: Introduction to PHP

MCQs On Class 1

 Introduction to PHP

1. What does PHP stand for? a) Personal Home Page b) Private Hypertext Processor c) PHP: Hypertext Preprocessor d) Personal Hypertext Processor Answer: c) PHP: Hypertext Preprocessor 2. Which of the following is NOT a feature of PHP? a) Server-side scripting b) Open-source c) Client-side scripting d) Cross-platform compatibility Answer: c) Client-side scripting 3. Which of the following is a common use of PHP in web development? a) Styling HTML content b) Managing databases c) Creating animations d) Designing UI Answer: b) Managing databases 4. Which of the following tools is NOT typically used to set up a PHP development environment? a) XAMPP b) WAMP c) MAMP d) Photoshop Answer: d) Photoshop 5. What command is used to display PHP configuration information and verify the PHP installation? a) echo "PHP"; b) print_r("PHP Info"); c) phpinfo(); d) var_dump("PHP"); Answer: c) phpinfo(); 6. In which tag do we write PHP code inside an HTML file? a) <php> b) <script> c) <code> d) <?php ... ?> Answer: d) <?php ... ?> 7. What is the primary role of PHP in web development? a) To add styles to HTML elements b) To process and generate dynamic content on the server c) To create static web pages d) To design the user interface Answer: b) To process and generate dynamic content on the server 8. Which one of the following servers is used by default when setting up XAMPP? a) Nginx b) Tomcat c) Apache d) IIS Answer: c) Apache 9. What does the function phpinfo() output when run in a PHP script? a) The HTML content of the webpage b) Information about the PHP configuration, such as version and installed modules c) The current server time d) The source code of the script Answer: b) Information about the PHP configuration, such as version and installed modules 10. After setting up a local development environment with XAMPP/WAMP/MAMP, where should you place your PHP files to run them via a browser? a) Anywhere on the desktop b) Inside the root directory of the web server (e.g., htdocs in XAMPP) c) In the PHP installation folder d) Inside the operating system’s system32 folder Answer: b) Inside the root directory of the web server (e.g., htdocs in XAMPP) 11. Which of the following is true about PHP? a) PHP can only be used on Windows servers. b) PHP code is executed on the client-side. c) PHP code is executed on the server-side. d) PHP cannot be embedded within HTML. Answer: c) PHP code is executed on the server-side. 12. What is the default file extension for PHP files? a) .html b) .php c) .js d) .xml Answer: b) .php 13. Which of the following statements about PHP is false? a) PHP is platform-independent. b) PHP can handle forms, such as gathering user input and saving it in a database. c) PHP is a client-side scripting language. d) PHP can be used to generate dynamic page content. Answer: c) PHP is a client-side scripting language. 14. In which of the following ways can PHP scripts be executed? a) In a web browser via a web server b) From the command line c) Embedded within HTML d) All of the above Answer: d) All of the above 15. Which of the following is NOT a popular web server that can run PHP? a) Apache b) Microsoft IIS c) Nginx d) PostgreSQL Answer: d) PostgreSQL 16. Which of the following commands is used to start the Apache server in XAMPP? a) Start MySQL b) Run PHP c) Start Apache d) Execute PHP Answer: c) Start Apache 17. Which PHP version introduced the Zend Engine? a) PHP 4 b) PHP 5 c) PHP 7 d) PHP 8 Answer: a) PHP 4 18. How can you test if a web server is properly running PHP? a) Create a .html file and open it in a browser. b) Run the command php -v in the terminal. c) Place a file with <?php echo "Hello, World!"; ?> in the server's root directory and access it via a browser. d) Open the XAMPP control panel and look at the status. Answer: c) Place a file with <?php echo "Hello, World!"; ?> in the server's root directory and access it via a browser. 19. Which of the following is true when embedding PHP code within an HTML file? a) PHP code is executed before the HTML is sent to the browser. b) PHP code is ignored by the server. c) PHP code is executed after the HTML is rendered in the browser. d) PHP code cannot be embedded within HTML. Answer: a) PHP code is executed before the HTML is sent to the browser. 20. What is the purpose of using XAMPP/WAMP/MAMP in PHP development? a) To create complex animations b) To simulate a web server environment on a local machine c) To compile PHP code d) To design HTML pages Answer: b) To simulate a web server environment on a local machine 21. Which of the following is required to run PHP scripts on your local machine? a) A text editor b) A web server like Apache or Nginx c) PHP installed on your machine d) All of the above Answer: d) All of the above 22. What is the role of htdocs (or www in WAMP/MAMP) in a local development environment? a) It is where the PHP interpreter is located. b) It is the directory where web server logs are stored. c) It is the root directory where PHP files should be placed to be accessible via the browser. d) It is the directory where XAMPP/WAMP/MAMP is installed. Answer: c) It is the root directory where PHP files should be placed to be accessible via the browser. 23. What is the main reason for using PHP in web development? a) To style web pages with CSS b) To perform complex calculations on the client-side c) To create static HTML pages d) To generate dynamic content and interact with databases Answer: d) To generate dynamic content and interact with databases 24. Which of the following commands is used to stop the Apache server in XAMPP? a) Stop PHP b) End Apache c) Stop Apache d) Shutdown Server Answer: c) Stop Apache 25. Which PHP function is commonly used to check for syntax errors in PHP code? a) syntax_check() b) phpinfo() c) lint d) PHP does not have a built-in function for syntax checking, but tools like php -l can be used Answer: d) PHP does not have a built-in function for syntax checking, but tools like php -l can be used 26. Which of the following best describes PHP? a) PHP is a database management system. b) PHP is a programming language primarily used for creating desktop applications. c) PHP is a server-side scripting language used for web development. d) PHP is a client-side scripting language like JavaScript. Answer: c) PHP is a server-side scripting language used for web development. 27. What is the primary function of the PHP interpreter? a) To compile PHP code into machine code. b) To execute PHP code on the server and generate HTML content. c) To translate PHP code into JavaScript. d) To create database schemas. Answer: b) To execute PHP code on the server and generate HTML content. 28. Which of the following is the correct syntax for embedding PHP code within an HTML file? a) <php> ... </php> b) <script php> ... </script> c) <?php ... ?> d) <PHP: ... :PHP> Answer: c) <?php ... ?> 29. Which of the following is NOT a valid way to start a PHP block? a) <?php b) <?= c) <? d) <%php Answer: d) <%php 30. When using XAMPP, which folder typically serves as the root directory for your web files? a) /usr/local/bin/ b) C:\xampp\htdocs\ c) C:\xampp\server\ d) C:\xampp\www\ Answer: b) C:\xampp\htdocs\ 31. How can you check the PHP version installed on your local machine using the command line? a) php --version b) php -v c) phpinfo() d) Both a) and b) Answer: d) Both a) and b) 32. What happens when you try to run a PHP script on a server that does not have PHP installed? a) The PHP code is executed but with errors. b) The PHP code is displayed as plain text in the browser. c) The browser automatically installs PHP. d) The server returns a "404 Not Found" error. Answer: b) The PHP code is displayed as plain text in the browser. 33. Which of the following is the correct way to declare a PHP variable? a) $variable_name = value; b) var variable_name = value; c) let $variable_name = value; d) variable_name := value; Answer: a) $variable_name = value; 34. In a local development environment, which of the following URLs might you use to access a PHP file named test.php located in the root directory (htdocs) of XAMPP? a) http://localhost/test.php b) http://localhost/php/test.php c) http://localhost/xampp/test.php d) http://localhost/apache/test.php Answer: a) http://localhost/test.php 35. What does the <?php ... ?> tag do in an HTML file? a) It indicates the start and end of a PHP script. b) It comments out the code within the tags. c) It is used to include JavaScript code in HTML. d) It formats text within the tags. Answer: a) It indicates the start and end of a PHP script. 36. Which of the following functions is commonly used in PHP to output text or HTML to the browser? a) display() b) print() c) output() d) echo() Answer: d) echo() 37. What is the purpose of using a local development environment like XAMPP/WAMP/MAMP? a) To host a website on the internet. b) To test and develop web applications locally without needing an internet connection. c) To compile PHP scripts into executable files. d) To create desktop applications. Answer: b) To test and develop web applications locally without needing an internet connection. 38. Which of the following best describes the phpinfo() function in PHP? a) It displays information about PHP syntax errors. b) It outputs information about the PHP configuration and environment. c) It returns the PHP version as a string. d) It checks if PHP is installed on the server. Answer: b) It outputs information about the PHP configuration and environment. 39. If a PHP script is not working as expected, what is the best way to start troubleshooting? a) Delete the script and start over. b) Use phpinfo() to check the server configuration. c) Check the error log or use debugging techniques to identify the issue. d) Change the PHP version to see if it resolves the issue. Answer: c) Check the error log or use debugging techniques to identify the issue. 40. Which of the following statements is true about PHP variables? a) PHP variables are case-insensitive. b) PHP variables must be declared with a data type. c) PHP variables are prefixed with a dollar sign $. d) PHP variables cannot be reassigned after their initial assignment. Answer: c) PHP variables are prefixed with a dollar sign $. 41. Which of the following methods can be used to access PHP files in a browser when using XAMPP? a) Typing the PHP code directly into the browser's address bar. b) Saving the PHP file in the htdocs directory and accessing it via http://localhost/filename.php. c) Saving the PHP file on the desktop and double-clicking it. d) Running the PHP file through a PHP interpreter from the command line. Answer: b) Saving the PHP file in the htdocs directory and accessing it via http://localhost/filename.php. 42. What is the primary purpose of a server-side scripting language like PHP? a) To style web pages using CSS. b) To execute code on the client’s browser. c) To handle requests and generate dynamic web content on the server before sending it to the client. d) To create animations in web pages. Answer: c) To handle requests and generate dynamic web content on the server before sending it to the client. 43. What will happen if you place a PHP file in the htdocs folder of XAMPP but the Apache server is not running? a) The PHP file will execute normally. b) The browser will download the PHP file as a plain text file. c) The browser will display a "Server Not Found" error. d) The PHP file will display an error message indicating Apache is not running. Answer: c) The browser will display a "Server Not Found" error. 44. Which of the following is required to view the output of a PHP script in a web browser? a) A PHP interpreter installed on the client machine. b) A running web server like Apache or Nginx. c) The PHP file must be compiled first. d) The PHP file must be opened in a text editor. Answer: b) A running web server like Apache or Nginx. 45. Which of the following components is typically NOT included in XAMPP? a) Apache b) MySQL c) PHP d) Python Answer: d) Python 46. If you receive a "500 Internal Server Error" when running a PHP script on your local server, what is the most likely cause? a) The PHP script contains a syntax error. b) The server is unable to find the PHP file. c) The server does not have PHP installed. d) The PHP file was saved with a .html extension instead of .php. Answer: a) The PHP script contains a syntax error. 47. Which of the following PHP tags is used to output content directly to the browser without using echo? a) <?php ... ?> b) <?= ... ?> c) <%php ... %> d) <?php echo ... ?> Answer: b) <?= ... ?> 48. In the XAMPP control panel, which action should you take to start the MySQL database server? a) Click on the "MySQL Admin" button. b) Click on the "Start" button next to MySQL. c) Click on the "Config" button next to MySQL. d) Click on the "Stop" button next to MySQL. Answer: b) Click on the "Start" button next to MySQL. 49. What is the significance of using phpinfo(); in a PHP script? a) It checks for syntax errors in the PHP script. b) It outputs the current PHP version and configuration settings. c) It starts the Apache server. d) It creates a connection to the MySQL database. Answer: b) It outputs the current PHP version and configuration settings. 50. Which of the following statements is true about the localhost in a PHP development environment? a) localhost refers to an external server on the internet. b) localhost is the default hostname that points to your own computer. c) localhost is only accessible through an internet connection. d) localhost can only be used with HTML files, not PHP files. Answer: b) localhost is the default hostname that points to your own computer. 51. What will happen if you try to run a PHP script without starting the Apache server in XAMPP? a) The script will execute with limited functionality. b) The script will open as a text file in the browser. c) The script will automatically start the Apache server. d) The script will execute normally. Answer: b) The script will open as a text file in the browser. 52. Which of the following options is used to stop both Apache and MySQL services in XAMPP? a) Close the XAMPP control panel. b) Click "Stop" next to Apache and MySQL in the XAMPP control panel. c) Uninstall XAMPP. d) Disconnect from the internet. Answer: b) Click "Stop" next to Apache and MySQL in the XAMPP control panel. 53. What file extension should be used when saving a PHP script to ensure it executes correctly on the server? a) .html b) .php c) .js d) .txt Answer: b) .php 54. When working with PHP, what is the purpose of the echo statement? a) To define a new PHP function. b) To declare a variable. c) To output text or HTML content to the browser. d) To comment out a section of code. Answer: c) To output text or HTML content to the browser. 55. Which of the following is true about PHP's compatibility? a) PHP only works with Apache servers. b) PHP is compatible with multiple operating systems, including Windows, macOS, and Linux. c) PHP scripts can only be run on Windows-based servers. d) PHP does not support database integration. Answer: b) PHP is compatible with multiple operating systems, including Windows, macOS, and Linux. 56. Which of the following will correctly display "Hello, World!" in a browser when running a PHP script? a) <?php echo "Hello, World!"; ?> b) <?php display("Hello, World!"); ?> c) <?php write("Hello, World!"); ?> d) <?php output("Hello, World!"); ?> Answer: a) <?php echo "Hello, World!"; ?> 57. Why is PHP considered a "server-side" scripting language? a) Because it can be embedded in HTML files. b) Because it is executed on the server before the result is sent to the client's browser. c) Because it can run on any client device, including smartphones and tablets. d) Because it requires a browser to run. Answer: b) Because it is executed on the server before the result is sent to the client's browser. 58. Which of the following commands is used to access the XAMPP control panel in Windows? a) Open the terminal and type xampp start. b) Double-click the xampp-control.exe file in the XAMPP installation directory. c) Use the Run dialog and type php start. d) Open the Control Panel and search for XAMPP. Answer: b) Double-click the xampp-control.exe file in the XAMPP installation directory. 59. What is the purpose of a "localhost" environment in PHP development? a) To simulate a live server environment on your local machine. b) To access the internet via a local proxy. c) To host your website on the internet. d) To create offline web pages without a server. Answer: a) To simulate a live server environment on your local machine. 60. Which of the following actions should you take if the Apache server in XAMPP is not starting? a) Restart your computer. b) Check for port conflicts (e.g., port 80) and change the port settings in XAMPP. c) Uninstall and reinstall XAMPP. d) Disable your internet connection. Answer: b) Check for port conflicts (e.g., port 80) and change the port settings in XAMPP.   ***************************************