OOPs MCQs with answers

OOPs MCQs Questions and Answers

Most important OOPs MCQs questions with answers are given here to pass the initial tests of commissioned service of Pakistan Army, Navy and Air Force. These tests are very helpful for those who want to get job as Information and Communication Technology Officers like an ICTO in Pak Army Signal / IT Branch, In PAF IT Branch or in Pak Navy Information and technology Branch. Moreover, these questions are very helpful for those who are applying in education branch of all three forces related to the computer subject. Some of the past OOPs MCQs are given below;

  •              is the main concept of object-oriented programming. (Encapsulation, Inheritance, Polymorphism)
  •              is not a principle of OOP. (Reliability)
  • Inheritance in OOP is           . (The ability of a class to inherit properties and methods from another class)
  • Polymorphism in OOP is            (The ability of an object to take on many forms)
  • Encapsulation in OOP is          .  (The bundling of data and methods into a single unit)
  • An object in OOP is          (An instance of a class)
  • A class in OOP is                 (A collection of objects)
  •               keyword is used to create an object in most programming languages.   (new)
  • The purpose of a constructor in a class is             .  (To initialize the object’s state)
  • The concept of data hiding or encapsulation in OOP is              (Hiding data from the user)
  •                 access modifier allows a variable or method to be accessible within the same class only.   (private)
  • Inheritance allows a class to               (Inherit properties and methods from another class)
  • The two types of polymorphism in OOP are                 (Static polymorphism and dynamic polymorphism)
  • Type of polymorphism is achieved through function overloading in OOP is                 (Static polymorphism)
  •                  type of polymorphism is achieved through function overriding in OOP.   (Dynamic polymorphism)
  • Polymorphism is closely related to which principle of OOP                 . (Abstraction)
  •                  keyword is used to achieve method overriding in OOP.   (override)
  •                type of polymorphism is resolved at compile-time.  (Early binding polymorphism)
  • For more OOPs MCQs see below.

OOPs MCQs Questions with Answers Online

OOPs MCQs Questions with answers are given here for more 100% result in initial tests,

  •               type of polymorphism is resolved at runtime. (Late binding polymorphism)
  •                  concept allows polymorphism to be achieved in OOP. (Inheritance, Encapsulation, Method overloading)
  • Polymorphism allows objects of different classes to be treated as objects of the same               .   (Type)
  • Code maintenance in software development is              (Fixing bugs and issues in existing code)
  •                 is NOT a common type of code maintenance.   (Recursive maintenance)
  • The purpose of corrective maintenance is                (To fix defects and issues in the code)
  •                type of code maintenance involves modifying the code to accommodate changes in the environment or requirements.  (Adaptive maintenance)
  • The goal of perfective maintenance is                 (To add new features to the code)
  •                type of code maintenance focuses on improving the maintainability and readability of the code.  (Preventive maintenance)
  • The importance of code documentation in code maintenance is               .(It helps in understanding the code’s functionality and design)
  •                 practice can help with code maintenance in a team environment. (Regular code reviews)
  •                approach is recommended for effective code maintenance.(Following coding standards and best practices)
  •                 feature of OOP would indicate code reusability.  (Inheritance)
  •                 language does not support polymorphism but supports classes. (Ada)
  •                            specifier would be applied to the constructors only. (Explicit)
  • A constructor ________.  (Doesn’t consist of any return type)
  • The access specifier that is/are the most secure during inheritance is/are _______.  (Private)
  • The memory that is allocated for any objects is _______.  (RAM)
  •               classes is a specialization of some more general template classes. (String)
  • A derived class is also called a _______.  (Subclass)
  •                  inheritance is shown in case we inherit some base class from another class, then one of the classes derives it.   (Multi-level)
  • For more OOPs MCQs for PAF Army and Navy see below.

Object Oriented Programming MCQs with Answers Online

If you want to prepare OOPs MCQs for initial tests of ICTOs then see below.

  • Hierarchical inheritance could be some subset of _________ inheritance. (Hybrid)
  •                   is the name of the feature in which we enforce the definitions of the abstract function at the compile time.  (Dynamic Polymorphism)
  • If in case a class is called in the main function directly and has a public member function, then _________.  (It will lead to the production of an undeclared function error)
  • ______ is the universal handler class for exceptions.  (Exceptions)
  • Temporary objects (that are created during the return by value) created               (Within the function)
  •                  types of values result from a delete operator.  (void)
  •                 attribute can we use if we want to get the actual size of any array. (Array_name.length)
  •               function is used to get any character that is present at a certain index of a string.   (char charAt(index); )
  •                access modifiers allows a class member to be accessed from anywhere within the same package, as well as from any subclass outside the package.  (protected)
  •                access modifier restricts a class member to be accessed only within the same class.  (private)
  •                 access modifier allows a class member to be accessed from anywhere in the program, regardless of the package.  (public)
  •                 is the default access modifier for class members if no explicit access modifier is specified.   (default (package-private) )
  •               access modifier allows a class to be accessed from anywhere in the program.  (public)
  • ______ is a delineated section of computer memory that holds a collection of data and a set of operations capable of accessing that data. (Objects)
  • When a program runs, the ____ communicate with each other by exchanging messages.  (Objects)
  • Objects are variables of the ____ type.  (Class)
  • The most notable characteristic of a class is its _______. (Data encapsulation)
  •  _______concept is not embraced by object-based programming languages. (Inheritance, Dynamic binding)
  • In procedure-oriented languages, _______  approach is followed. (Top-down approach)
  • The behavior of  _______ feature in OOP depends on the types of data used in the operation. (Polymorphism)
  •   _______programming language does not adhere to the principles of OOP. (FORTAN)
  •  _______ are the methods contained within an object called. (Instance Methods)
  •  _______data of a class cannot be accessed by a non-member function. (Private data)
  • A static member function can be invoked using the ____ name.  (Class name)
  • For more online tests of ICTOs other than OOPs MCQs do your practice on the following links.
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