CodeIgniter Quiz – Multiple Choice Questions and Answers

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CodeIgniter Quiz – Multiple Choice Questions and Answers: CodeIgniter is an open-source software rapid development web framework, for use in building dynamic websites with PHP. CodeIgniter Multiple Choice Questions and Answers are provided in this post. Interested applicants can practice this Codeigniter MCQ Quiz. The below-given CodeIgniter MCQ Online Quiz will help the aspirants to speed up their performance at the time of attending the online exams.

CodeIgniter Quiz – Details

Codeigniter MCQ Quiz Practice Now

Which of the following is the correct way to load a model in CodeIgniter?
a) $this->model->(‘model_name’);
b) $this->load->model(‘model_name’);
c) $this->model(‘model_name’);
d) $this->load_model(‘model_name’);

Answer: b) $this->load->model(‘model_name’);

Explanation: To load a model in CodeIgniter, the correct syntax is $this->load->model(‘model_name’); where ‘model_name’ is the name of the model file without the .php extension.

What is the purpose of a controller in CodeIgniter?
a) To handle HTTP requests and responses
b) To perform database operations
c) To create user interfaces
d) To handle server-side validation

Answer: a) To handle HTTP requests and responses

Explanation: A controller in CodeIgniter is responsible for handling HTTP requests and returning responses. It acts as an intermediary between the model (which interacts with the database) and the view (which displays the data).

Which of the following is the correct way to create a CodeIgniter helper function?
a) Create a file in the helpers directory and add the function to it
b) Create a function in the controller
c) Create a function in the model
d) Create a function in the view

Answer: a) Create a file in the helpers directory and add the function to it

Explanation: Helper functions in CodeIgniter are stored in files located in the application/helpers directory. To create a helper function, you must create a new file in this directory and add the function to it.

Which of the following is the correct way to set a session variable in CodeIgniter?
a) $this->session->set(‘variable_name’, ‘value’);
b) $this->session->set_userdata(‘variable_name’, ‘value’);
c) $this->session->set_var(‘variable_name’, ‘value’);
d) $this->session->set_data(‘variable_name’, ‘value’);

Answer: b) $this->session->set_userdata(‘variable_name’, ‘value’);

Explanation: To set a session variable in CodeIgniter, you can use the $this->session->set_userdata(‘variable_name’, ‘value’) method.

What is the purpose of the CodeIgniter config.php file?
a) To store global variables and constants
b) To define database configuration settings
c) To define routes
d) To store application-specific settings

Answer: d) To store application-specific settings

Explanation: The config.php file in CodeIgniter is used to store application-specific settings such as the base URL, default controller, and encryption key. It is located in the application/config directory.

Which of the following is the correct way to retrieve a POST parameter in CodeIgniter?
a) $this->input->post(‘parameter_name’);
b) $_POST[‘parameter_name’];
c) $this->post(‘parameter_name’);
d) $this->request->post(‘parameter_name’);

Answer: a) $this->input->post(‘parameter_name’);

Explanation: To retrieve a POST parameter in CodeIgniter, you can use the $this->input->post(‘parameter_name’) method.

Which of the following is the correct way to define a custom route in CodeIgniter?
a) $route[‘custom/route’] = ‘controller/method’;
b) $custom_route[‘controller/method’] = ‘custom/route’;
c) $this->router->add_route(‘custom/route’, ‘controller/method’);
d) $this->route->set(‘custom/route’, ‘controller/method’);

Answer: a) $route[‘custom/route’] = ‘controller/method’;

Explanation: To define a custom route in CodeIgniter, you can use the $route array in the application/config/routes.php file. The key in the $route array represents the custom URL route, while the value represents the controller and method that should be called when the route is accessed.

Which of the following is the correct way to retrieve the URI segments in CodeIgniter?
a) $this->uri->segment(‘segment_number’);
b) $_SERVER[‘REQUEST_URI’];
c) $this->uri[‘segment_number’];
d) $this->request->uri_segment(‘segment_number’);

Answer: a) $this->uri->segment(‘segment_number’);

Explanation: To retrieve the URI segments in CodeIgniter, you can use the $this->uri->segment(‘segment_number’) method, where ‘segment_number’ is the number of the URI segment you wish to retrieve.

Which of the following is the correct way to set a flash message in CodeIgniter?
a) $this->flash->set(‘message’);
b) $this->session->set_flashdata(‘message’);
c) $this->session->set_message(‘message’);
d) $this->message->set(‘message’);

Answer: b) $this->session->set_flashdata(‘message’);

Explanation: To set a flash message in CodeIgniter, you can use the $this->session->set_flashdata(‘message’) method. Flash messages are typically used to display success or error messages to the user after a form submission.

Which of the following is the correct way to load a view in CodeIgniter?
a) $this->view(‘view_name’);
b) $this->load->view(‘view_name’);
c) $this->load_view(‘view_name’);
d) $this->display->view(‘view_name’);

Answer: b) $this->load->view(‘view_name’);

Explanation: To load a view in CodeIgniter, you can use the $this->load->view(‘view_name’) method, where ‘view_name’ is the name of the view file without the .php extension.

Which of the following is the correct way to set a cookie in CodeIgniter?
a) $this->cookie->set(‘cookie_name’, ‘value’, ‘expire_time’);
b) $this->input->set_cookie(‘cookie_name’, ‘value’, ‘expire_time’);
c) $this->cookie->set_cookie(‘cookie_name’, ‘value’, ‘expire_time’);
d) $this->input->cookie(‘cookie_name’, ‘value’, ‘expire_time’);

Answer: b) $this->input->set_cookie(‘cookie_name’, ‘value’, ‘expire_time’);

Explanation: To set a cookie in CodeIgniter, you can use the $this->input->set_cookie(‘cookie_name’, ‘value’, ‘expire_time’) method, where ‘cookie_name’ is the name of the cookie, ‘value’ is the value to be stored in the cookie, and ‘expire_time’ is the expiration time for the cookie.

Which of the following is the correct way to perform server-side validation in CodeIgniter?
a) Use JavaScript to validate user input
b) Use HTML5 validation attributes
c) Use CodeIgniter form validation library
d) Use regular expressions

Answer: c) Use CodeIgniter form validation library

Explanation: To perform server-side validation in CodeIgniter, you can use the form validation library. This library provides a set of rules that you can use to validate user input on the server-side.

Which of the following is the correct way to retrieve data from the database in CodeIgniter?
a) $this->db->get(‘table_name’);
b) $this->query(‘SELECT * FROM table_name’);
c) $this->database->get(‘table_name’);
d) $this->db_query(‘SELECT * FROM table_name’);

Answer: a) $this->db->get(‘table_name’);

Explanation: To retrieve data from the database in CodeIgniter, you can use the $this->db->get(‘table_name’) method, where ‘table_name’ is the name of the database table you wish to retrieve data from.

Which of the following is the correct way to insert data into the database in CodeIgniter?
a) $this->database->insert(‘table_name’, $data);
b) $this->db->insert_data(‘table_name’, $data);
c) $this->query(‘INSERT INTO table_name VALUES ($data)’);
d) $this->db->insert(‘table_name’, $data);

Answer: d) $this->db->insert(‘table_name’, $data);

Explanation: To insert data into the database in CodeIgniter, you can use the $this->db->insert(‘table_name’, $data) method, where ‘table_name’ is the name of the database table you wish to insert data into, and $data is an associative array of data to be inserted.

Which of the following is the correct way to update data in the database in CodeIgniter?
a) $this->db->update_data(‘table_name’, $data, ‘where_clause’);
b) $this->query(‘UPDATE table_name SET $data WHERE $where_clause’);
c) $this->db->update(‘table_name’, $data, ‘where_clause’);
d) $this->database->update(‘table_name’, $data, ‘where_clause’);

Answer: c) $this->db->update(‘table_name’, $data, ‘where_clause’);

Explanation: To update data in the database in CodeIgniter, you can use the $this->db->update(‘table_name’, $data, ‘where_clause’) method, where ‘table_name’ is the name of the database table you wish to update data in, $data is an associative array of data to be updated, and ‘where_clause’ is the condition for updating data.

Which of the following is the correct way to delete data from the database in CodeIgniter?
a) $this->database->delete_data(‘table_name’, ‘where_clause’);
b) $this->query(‘DELETE FROM table_name WHERE $where_clause’);
c) $this->db->delete(‘table_name’, ‘where_clause’);
d) $this->delete->data(‘table_name’, ‘where_clause’);

Answer: c) $this->db->delete(‘table_name’, ‘where_clause’);

Explanation: To delete data from the database in CodeIgniter, you can use the $this->db->delete(‘table_name’, ‘where_clause’) method, where ‘table_name’ is the name of the database table you wish to delete data from, and ‘where_clause’ is the condition for deleting data.

Which of the following is the correct way to implement pagination in CodeIgniter?
a) Use the CodeIgniter pagination library
b) Write custom pagination code
c) Use JavaScript to implement pagination
d) Use the HTML5 pagination element

Answer: a) Use the CodeIgniter pagination library

Explanation: CodeIgniter provides a pagination library that can be used to easily implement pagination in your application. This library provides a set of functions that you can use to generate pagination links and handle pagination data.

Which of the following is the correct way to implement caching in CodeIgniter?
a) Use the CodeIgniter cache library
b) Implement caching using memcached
c) Use the CodeIgniter caching driver
d) Use a third-party caching library

Answer: c) Use the CodeIgniter caching driver

Explanation: CodeIgniter provides a caching driver that allows you to implement caching in your application. This driver supports various caching mechanisms, including file-based caching, APC caching, and memcached caching.

Which of the following is the correct way to implement sessions in CodeIgniter?
a) Use the PHP session functions
b) Write custom session code
c) Use the CodeIgniter session library
d) Use a third-party session library

Answer: c) Use the CodeIgniter session library

Explanation: CodeIgniter provides a session library that allows you to easily implement sessions in your application. This library provides functions for setting and retrieving session data, as well as functions for managing session expiration and session data storage.

Which of the following is the correct way to handle form validation in CodeIgniter?
a) Use the CodeIgniter form validation library
b) Write custom form validation code
c) Use JavaScript for form validation
d) Use a third-party form validation library

Answer: a) Use the CodeIgniter form validation library

Explanation: CodeIgniter provides a form validation library that allows you to easily validate form data in your application. This library provides functions for setting validation rules, validating form data, and displaying validation errors.

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