{"id":19335,"date":"2024-04-15T05:38:05","date_gmt":"2024-04-15T05:38:05","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=19335"},"modified":"2024-04-15T05:38:05","modified_gmt":"2024-04-15T05:38:05","slug":"private-data-can-be-accessed-by-a-class-member-functions-b-functions-in-derived-classes-c-both-a-and-b-d-neither-a-nor-b","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/private-data-can-be-accessed-by-a-class-member-functions-b-functions-in-derived-classes-c-both-a-and-b-d-neither-a-nor-b\/","title":{"rendered":"Private data can be accessed by A. class member functions B. functions in derived classes C. both (a) and (b) D. neither (a) nor (b)"},"content":{"rendered":"<p>\r\n    <!-- Check if it's an AMP page -->\r\n            <!-- Non-AMP version -->\r\n        <div class=\"mcq-container\" data-quiz-id=\"quizState_6ac1c9355c24f\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"false\">\r\n                    class member functions                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"false\">\r\n                    functions in derived classes                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"true\">\r\n                    both (a) and (b)                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    neither (a) nor (b)                <\/div>\r\n                            \r\n            <!-- Feedback messages for non-AMP -->\r\n            <div class=\"feedback\" data-feedback=\"wrong\">Answer is Right!<\/div>\r\n            <div class=\"feedback\" data-feedback=\"right\">Answer is Wrong!<\/div>\r\n        <\/div>\r\n\r\n        <script>\r\n        document.addEventListener('DOMContentLoaded', function () {\r\n            var containers = document.querySelectorAll('.mcq-container');\r\n\r\n            containers.forEach(function(container) {\r\n                var options = container.querySelectorAll('.option');\r\n                var feedbackSelect = container.querySelector('[data-feedback=\"select\"]');\r\n                var feedbackWrong = container.querySelector('[data-feedback=\"wrong\"]');\r\n                var feedbackRight = container.querySelector('[data-feedback=\"right\"]');\r\n\r\n                options.forEach(function(option) {\r\n                    option.addEventListener('click', function() {\r\n                        var selectedOption = option.getAttribute('data-option-key');\r\n                        var isCorrect = option.getAttribute('data-is-correct') === 'true';\r\n\r\n                        \/\/ Remove previous selections\r\n                        options.forEach(function(opt) {\r\n                            opt.classList.remove('correct', 'incorrect');\r\n                        });\r\n\r\n                        \/\/ Add the correct\/incorrect class\r\n                        if (isCorrect) {\r\n                            option.classList.add('correct');\r\n                            feedbackRight.hidden = false;\r\n                            feedbackWrong.hidden = true;\r\n                        } else {\r\n                            option.classList.add('incorrect');\r\n                            feedbackRight.hidden = true;\r\n                            feedbackWrong.hidden = false;\r\n                        }\r\n\r\n                        \/\/ Hide select feedback\r\n                        feedbackSelect.hidden = true;\r\n                    });\r\n                });\r\n            });\r\n        });\r\n        <\/script>\r\n    \r\n    <!--more--><\/p>\n<p>The correct answer is: <strong>C. both (a) and (b)<\/strong><\/p>\n<p>Private data can be accessed by class member functions and functions in derived classes.<\/p>\n<p>Class member functions can access private data because they are part of the same class. Functions in derived classes can access private data because they inherit from the class that contains the private data.<\/p>\n<p>Here is an example of <div class=\"youtube-subscribe-container\">\r\n        <a href=\"https:\/\/www.youtube.com\/channel\/UCNHT8lW-JmLC68rjBfZhdkg?sub_confirmation=1\" target=\"_blank\" class=\"youtube-subscribe-button\">\r\n            <span class=\"youtube-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\">\r\n                    <path d=\"M549.7 124.1c-6.3-23.7-24.8-42.3-48.3-48.6C458.8 64 288 64 288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Subscribe on YouTube\r\n        <\/a>\r\n    <\/div> how private data can be accessed by class member functions:<\/p>\n<p>&#8220;`class Person {<br \/>\n  private:<br \/>\n    string name;<br \/>\n  public:<br \/>\n    void setName(string name) {<br \/>\n      this-&gt;name = name;<br \/>\n    }<br \/>\n    string getName() {<br \/>\n      return name;<br \/>\n    }<br \/>\n};<\/p>\n<p>int main() {<br \/>\n  Person person;<br \/>\n  person.setName(&#8220;John Doe&#8221;);<br \/>\n  cout &lt;&lt; person.getName() &lt;&lt; endl; \/\/ prints &#8220;John Doe&#8221;<br \/>\n}<br \/>\n&#8220;`<\/p>\n<p>In this example, the <code>setName()<\/code> and <div class=\"telegram-channel-container\">\r\n        <a href=\"https:\/\/t.me\/pscnotes2025\" target=\"_blank\" class=\"telegram-channel-button\">\r\n            <span class=\"telegram-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 496 512\">\r\n                    <path fill=\"white\" d=\"M248,8C111,8,0,119,0,256s111,248,248,248s248-111,248-248S385,8,248,8z M362,177L320,367c-3,14-10,18-20,14l-56-41l-27,26 c-3,3-5,5-10,5l4-63L323,196c5-5-1-7-8-3l-98,62l-42-13c-9-3-10-9,2-14l162-63C351,160,365,164,362,177z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Join Our Telegram Channel\r\n        <\/a>\r\n    <\/div> <code>getName()<\/code> functions are able to access the private <code>name<\/code> variable because they are part of the <code>Person<\/code> class.<\/p>\n<p>Here is an example of how private data can be accessed by functions in derived classes:<\/p>\n<p>&#8220;`class Person {<br \/>\n  private:<br \/>\n    string name;<br \/>\n  public:<br \/>\n    void setName(string name) {<br \/>\n      this-&gt;name = name;<br \/>\n    }<br \/>\n    string getName() {<br \/>\n      return name;<br \/>\n    }<br \/>\n};<\/p>\n<p>class Employee : public Person {<br \/>\n  private:<br \/>\n    int id;<br \/>\n  public:<br \/>\n    void setId(int id) {<br \/>\n      this-&gt;id = id;<br \/>\n    }<br \/>\n    int getId() {<br \/>\n      return id;<br \/>\n    }<br \/>\n};<\/p>\n<p>int main() {<br \/>\n  Employee employee;<br \/>\n  employee.setName(&#8220;John Doe&#8221;);<br \/>\n  employee.setId(12345);<br \/>\n  cout &lt;&lt; employee.getName() &lt;&lt; &#8221; &#8221; &lt;&lt; employee.getId() &lt;&lt; endl; \/\/ prints &#8220;John Doe 12345&#8221;<br \/>\n}<br \/>\n&#8220;`<\/p>\n<p>In this example, the <code>setId()<\/code> and <code>getId()<\/code> functions are able to access the private <code>id<\/code> variable because they are part of the <code>Employee<\/code> class, which inherits from the <code>Person<\/code> class.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Join Our Telegram Channel Subscribe on 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