{"id":112,"date":"2023-09-01T15:30:54","date_gmt":"2023-09-01T15:30:54","guid":{"rendered":"https:\/\/www.multiplechoicequestions.org\/?p=112"},"modified":"2023-09-01T15:30:54","modified_gmt":"2023-09-01T15:30:54","slug":"cpp-classes-objects-mcq","status":"publish","type":"post","link":"https:\/\/www.multiplechoicequestions.org\/cpp-programming\/cpp-classes-objects-mcq\/","title":{"rendered":"C++ Classes and Objects MCQ"},"content":{"rendered":"\n<p>Classes and objects are foundational concepts in the C++ programming language, especially when delving into Object-Oriented Programming (OOP). They help in organizing and structuring the code. How well do you know about C++ classes and objects? Let&#8217;s find out with this beginner-friendly quiz!<\/p>\n<h2>1. What is a class in C++?<\/h2>\n<div class=\"optioncontainer\">a) A data type<\/div>\n<div class=\"optioncontainer\">b) A function<\/div>\n<div class=\"optioncontainer\">c) A blueprint for creating objects<\/div>\n<div class=\"optioncontainer\">d) An instance of an object<\/div>\n<button class=\"answer-explanation\" onclick=\"toggleAnswer('answer1')\">Click to View Answer and Explanation<\/button>\n<div class=\"answer\" id=\"answer1\">\n\t<h3>Answer:<\/h3>\t\n\t<div class=\"optioncontainer\">c) A blueprint for creating objects<\/div>\n\t<h3>Explanation:<\/h3>\n\t<p>A class in C++ defines attributes (data members) and behaviors (member functions or methods) that its objects will have. It acts as a blueprint for creating objects.<\/p>\n<\/div>\n\n<h2>2. How do you define an object in C++?<\/h2>\n<div class=\"optioncontainer\">a) classname objectname;<\/div>\n<div class=\"optioncontainer\">b) objectname classname;<\/div>\n<div class=\"optioncontainer\">c) define classname objectname;<\/div>\n<div class=\"optioncontainer\">d) class objectname;<\/div>\n<button class=\"answer-explanation\" onclick=\"toggleAnswer('answer2')\">Click to View Answer and Explanation<\/button>\n<div class=\"answer\" id=\"answer2\">\n\t<h3>Answer:<\/h3>\t\n\t<div class=\"optioncontainer\">a) classname objectname;<\/div>\n\t<h3>Explanation:<\/h3>\n\t<p>An object is an instance of a class. It&#8217;s defined using the class name followed by the object name.<\/p>\n<\/div>\n\n<h2>3. Which among these is a valid access specifier in C++?<\/h2>\n<div class=\"optioncontainer\">a) private<\/div>\n<div class=\"optioncontainer\">b) protected<\/div>\n<div class=\"optioncontainer\">c) public<\/div>\n<div class=\"optioncontainer\">d) All of the above<\/div>\n<button class=\"answer-explanation\" onclick=\"toggleAnswer('answer3')\">Click to View Answer and Explanation<\/button>\n<div class=\"answer\" id=\"answer3\">\n\t<h3>Answer:<\/h3>\t\n\t<div class=\"optioncontainer\">d) All of the above<\/div>\n\t<h3>Explanation:<\/h3>\n\t<p>C++ supports several access specifiers, including private, protected, and public, which determine the accessibility of class members.<\/p>\n<\/div>\n\n<h2>4. By default, members of a class are:<\/h2>\n<div class=\"optioncontainer\">a) Public<\/div>\n<div class=\"optioncontainer\">b) Private<\/div>\n<div class=\"optioncontainer\">c) Protected<\/div>\n<div class=\"optioncontainer\">d) None of the above<\/div>\n<button class=\"answer-explanation\" onclick=\"toggleAnswer('answer4')\">Click to View Answer and Explanation<\/button>\n<div class=\"answer\" id=\"answer4\">\n\t<h3>Answer:<\/h3>\t\n\t<div class=\"optioncontainer\">b) Private<\/div>\n\t<h3>Explanation:<\/h3>\n\t<p>In C++, if no access specifier is mentioned, class members are private by default.<\/p>\n<\/div>\n\n<h2>5. What will be the output of the following code?<\/h2>\n<div class=\"optioncontainer\">a) 5<\/div>\n<div class=\"optioncontainer\">b) 0<\/div>\n<div class=\"optioncontainer\">c) Compilation error<\/div>\n<div class=\"optioncontainer\">d) Undefined<\/div>\n<button class=\"answer-explanation\" onclick=\"toggleAnswer('answer5')\">Click to View Answer and Explanation<\/button>\n<div class=\"answer\" id=\"answer5\">\n\t<h3>Answer:<\/h3>\t\n\t<div class=\"optioncontainer\">c) Compilation error<\/div>\n\t<h3>Explanation:<\/h3>\n\t<p>The member variable x is private by default and cannot be accessed directly outside the class.<\/p>\n<\/div>\n\n<h2>6. Which among the following is a special type of function in a class?<\/h2>\n<div class=\"optioncontainer\">a) Inline function<\/div>\n<div class=\"optioncontainer\">b) Virtual function<\/div>\n<div class=\"optioncontainer\">c) Constructor<\/div>\n<div class=\"optioncontainer\">d) Static function<\/div>\n<button class=\"answer-explanation\" onclick=\"toggleAnswer('answer6')\">Click to View Answer and Explanation<\/button>\n<div class=\"answer\" id=\"answer6\">\n\t<h3>Answer:<\/h3>\t\n\t<div class=\"optioncontainer\">c) Constructor<\/div>\n\t<h3>Explanation:<\/h3>\n\t<p>A constructor is a special member function in a class that is executed whenever a new object of that class is created. It has the same name as the class.<\/p>\n<\/div>\n\n<h2>7. How can a member function be defined outside the class?<\/h2>\n<div class=\"optioncontainer\">a) By using the :: operator<\/div>\n<div class=\"optioncontainer\">b) By using the . operator<\/div>\n<div class=\"optioncontainer\">c) By using the -> operator<\/div>\n<div class=\"optioncontainer\">d) It can&#8217;t be defined outside the class<\/div>\n<button class=\"answer-explanation\" onclick=\"toggleAnswer('answer7')\">Click to View Answer and Explanation<\/button>\n<div class=\"answer\" id=\"answer7\">\n\t<h3>Answer:<\/h3>\t\n\t<div class=\"optioncontainer\">a) By using the :: operator<\/div>\n\t<h3>Explanation:<\/h3>\n\t<p>The scope resolution operator (::) is used to define a member function outside the class.<\/p>\n<\/div>\n\n<h2>8. What is the primary purpose of a destructor?<\/h2>\n<div class=\"optioncontainer\">a) To initialize the class members<\/div>\n<div class=\"optioncontainer\">b) To allocate memory for the object<\/div>\n<div class=\"optioncontainer\">c) To delete any dynamic memory allocated by the object<\/div>\n<div class=\"optioncontainer\">d) To copy the object<\/div>\n<button class=\"answer-explanation\" onclick=\"toggleAnswer('answer8')\">Click to View Answer and Explanation<\/button>\n<div class=\"answer\" id=\"answer8\">\n\t<h3>Answer:<\/h3>\t\n\t<div class=\"optioncontainer\">c) To delete any dynamic memory allocated by the object<\/div>\n\t<h3>Explanation:<\/h3>\n\t<p>A destructor is a special member function that cleans up and releases any resources (like dynamic memory) that might have been allocated during the object&#8217;s lifespan.<\/p>\n<\/div>\n\n<h2>9. Which of the following can&#8217;t have a return type?<\/h2>\n<div class=\"optioncontainer\">a) Member function<\/div>\n<div class=\"optioncontainer\">b) Inline function<\/div>\n<div class=\"optioncontainer\">c) Constructor<\/div>\n<div class=\"optioncontainer\">d) Static function<\/div>\n<button class=\"answer-explanation\" onclick=\"toggleAnswer('answer9')\">Click to View Answer and Explanation<\/button>\n<div class=\"answer\" id=\"answer9\">\n\t<h3>Answer:<\/h3>\t\n\t<div class=\"optioncontainer\">c) Constructor<\/div>\n\t<h3>Explanation:<\/h3>\n\t<p>Constructors don&#8217;t have a return type, not even void.<\/p>\n<\/div>\n\n<h2>10. A class can have:<\/h2>\n<div class=\"optioncontainer\">a) Only one constructor<\/div>\n<div class=\"optioncontainer\">b) Only two constructors<\/div>\n<div class=\"optioncontainer\">c) As many constructors as needed<\/div>\n<div class=\"optioncontainer\">d) No constructors<\/div>\n<button class=\"answer-explanation\" onclick=\"toggleAnswer('answer10')\">Click to View Answer and Explanation<\/button>\n<div class=\"answer\" id=\"answer10\">\n\t<h3>Answer:<\/h3>\t\n\t<div class=\"optioncontainer\">c) As many constructors as needed<\/div>\n\t<h3>Explanation:<\/h3>\n\t<p>A class can have multiple constructors as long as they have different parameters. This is known as constructor overloading.<\/p>\n<\/div>\n<p>Kudos for taking the C++ Classes and Objects quiz! Classes and objects are essential when working with C++, and understanding them is crucial for deeper dives into OOP. Whether you aced the quiz or learned something new, remember that practice makes perfect. Dive deeper into the topic and continue expanding your C++ knowledge!<\/p>\n<br \/><script>\n   window.onload = function() {\ndocument.getElementById('answer1').style.display = 'none';\ndocument.getElementById('answer2').style.display = 'none';\ndocument.getElementById('answer3').style.display = 'none';\ndocument.getElementById('answer4').style.display = 'none';\ndocument.getElementById('answer5').style.display = 'none';\ndocument.getElementById('answer6').style.display = 'none';\ndocument.getElementById('answer7').style.display = 'none';\ndocument.getElementById('answer8').style.display = 'none';\ndocument.getElementById('answer9').style.display = 'none';\ndocument.getElementById('answer10').style.display = 'none';\n    };\n\n    function toggleAnswer(answerId) {\n      var answer = document.getElementById(answerId);\n      if (answer.style.display === \"none\") {\n        answer.style.display = \"block\";\n      } else {\n        answer.style.display = \"none\";\n      }\n    }\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Classes and objects are foundational concepts in the C++ programming language, especially when delving into Object-Oriented Programming (OOP). They help in organizing and structuring the code. How well do you know about C++ classes and objects? Let&#8217;s find out with this beginner-friendly quiz! 1. What is a class in C++? a) A data type b) [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[6],"tags":[7],"class_list":["post-112","post","type-post","status-publish","format-standard","hentry","category-cpp-programming","tag-c-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>C++ Classes and Objects MCQ - Multiple Choice Questions<\/title>\n<meta name=\"description\" content=\"Classes and objects are foundational concepts in the C++ programming language, especially when delving into Object-Oriented Programming (OOP). 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