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Here, you will find OOPs Quiz Answers in Bold Color which are given below. These answers are updated recently and are 100% correct✅ answers of LinkedIn OOPs Skill Assessment.
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LinkedIn OOPs Assessment Answers
Q1. What is an example of dynamic binding?
- any method
- method overloading
- method overriding
- compiling
Q2. For which case would the use of a static attribute be appropriate?
- the number of people in each house in a small neighborhood
- the lot size for each house in a small neighborhood
- the color of each house in a small neighborhood
- the weather conditions for each house in a small neighborhood
Q3.1 Why would you create an abstract class, if it can have no real instances?
- to avoid redundant coding in children
- to explore a hypothetical class
- to prevent unwanted method implementation
- to reserve memory for an unspecified class type
Q3.2 Why would you create an abstract class, if it can have no real instances?
- to have common behavior in derived classes
- to explore a hypothetical class
- to prevent unwanted method implementation
- to reserve memory for an unspecified class type
Q4. When does static binding happen?
- only when you export
- both at compile time and runtime
- at compile time
- at runtime
Q5. What is the best reason to use a design pattern?
- It will result in code that is more extensible and maintainable
- It will result in a more compact product.
- It will speed initial development.
- It will allow you to add that design pattern to your resume.
Q6. What is encapsulation?
- defining classes by focusing on what is important for a purpose
- hiding the data and implementation details within a class
- making all methods private
- using words to define classes
Q7. What is an IS-A relationship?
- It implies encapsulation.
- A superclass object has an IS-A relationship with its subclass.
- It implies a virtual method.
- A subclass object has an IS-A relationship with its superclass or interface
Q8. You want a method with behavior similar to a virtual method–it is meant to be overridden –expect that it does not have a method body. It just has a method signature. What kind of method should you use?
- an abstract method
- a public internal method
- an internal method
- a protected internal method
Q9. Which code creates a new object from the Employee class?
- Employee current Employee = Employee.Create();
- Employee current Employee = new Employee();
- Employee currentEmployee;
- Employee currentEmployee = Employee.New();
Q10. Which type of constructor cannot have a return type?
- default
- copy
- parameterized
- Constructors do not have a return type
Q11.1 When is a constructor executed?
- when an object is created from a class using the new keyword
- when an class is defined using the class keyword
- every time an object is referenced
- when an object is created from a class using the create keyword
Q11.2 When is a constructor executed?
- when an object is created from a class
- when an class is defined using the class keyword
- every time an object is referenced
- when an object is created from a class using the create keyword
Q12. If a local class is defined in a function, what is true for an object of that class?
- The object can be accessed, declared, and used locally in that function.
- The object must be declared inside any other function.
- The object is temporarily accessible outside the function.
- The object can call all the other class members anywhere in the program.
Q13. Which two blocks are used to handle and check errors?
- do and check
- catching and trying
- try and catch
- do and while
Q14. Why would you implement composition using an id instead of a reference?
- It makes it easier to save the entity.
- all of these answers
- It can make the entity retrieval more efficient
- It minimizes coupling.
Q15. Which statement best describes the method of inheritance in OOP?
- Inheritance describes the ability to create new classes based on an existing class.
- Inheritance means that a group of related properties, methods, and other members are treated as a single unit or object.
- Inheritance forces a class to have a single responsibility from only one parent.
- Inheritance means that you will never have multiple classes that can be used interchangeably, even though each class implements the same properties or methods in different ways.
Q16 Which type of inheritance ,when done continuously, is similar to a tree structure?
- multilevel
- hierarchical and multiple
- hierarchical
- multiple
Q17. Which statement is true?
- A default parameter’s constructor is not equivalent to the default constructor
- A default constructor is inherited from a parent class
- A default constructor can be called explicitly
- A default constructor cannot be defined by the coder
Q18. Which of the following is NOT an advantage of using getters and setters?
- Getters and setters can speed up compilation.
- Getters and setters provide encapsulation of behavior.
- Getters and setters provide a debugging point for when a property changes at runtime.
- Getters and setters permit different access levels.
Q19. In context of OOP, what is association?
- Association is a relationship where all objects have their own life cycle and there is no owner.
- Association is the procecss where model elements cooperate to proide higher-level behavior.
- Association is whole/part relationship where one object is composed of one or more other objects, each of which is considered a part of the whole.
- Association is where all objects have their own life cycle, but there is ownerhip, and child objects can not belong to another parent object.
Q20. How are user stories different from use cases?
- User Stories are shorter and less detailed.
- User stories are more accurate.
- User stories are more detailed and structured.
- User storised are more anecdotal and personal.
Q21. Which type of inheritance must be used so that the resultant is hybrid?
- multiple
- any type of inheritance
- multilevel
- hierarchical
Hybrid inheritance is a composition of multiple and hierarchical inheritances
Q22. A language that does not support polymorphism but supports classes is considered what?
- an object-based language
- a class-based language
- a procedure-oriented language
- if classes are supported, polymorphism will be supported
Q23. If two classes combine some private data members and provides public member functions to access and manipulate those data members. Where is abstraction used?
- Abstraction is using a private access specifier for data members
- Abstraction is using public member functions to access and manipulate the data members
- Abstraction is using the class concept with both data members and member functions
- There is insufficient information to decide where abstraction is being used.
Q24. What are the five Creational Design patterns by the Gang of Four?
- Observer, State, Strategy, Template Method, and Visitor.
- Composite, Visitor, State, Prototype, and Singleton.
- Composite, Builder, Factory Method, Prototype, and Singleton.
- Abstract Factory, Builder, Factory Method, Prototype, and Singleton.
Q25. In multilevel inheritance, one class inherits how many classes?
- one class only
- two classes
- as many classes as required
- at least two classes
Q26. if an object is passed by reference, the changes made in the function are reflected **\_\_\_**.
- to the main object of the caller function, too
- on the caller function object and also the called function object
- on the copy of the object that is made during the pass
- only in the local scope of the called function
Q27. What is a method?
- a set of instructions designed to perform a frequently used operation within a program and return no values
- the exact same thing as a function and subroutine
- a set of variables that can change over time
- a procedure associated with data and behaviour
Q28. A mobile phone is made up of components such as a motherboard, camera, and sensors. The motherboard represents all the functions of a phone, the display shows the display only, and the phone is represented as a whole. Which of the following has the highest level of abstraction?
- camera
- display
- motherboard
- mobile phone
Q29. Which class has the highest degree of abstraction in a multilevel inheritance relationship of five levels?
- the class at the third level
- the class at the first level
- All have the same degree of abstraction.
- the class at the second level
Q30. In the contex of OOP, what is association?
- Association is a whole/part relationship where one object is composed of one or more other objects, each of which is considered a part of the whole.
- Association is where all objects have their own life cycle, but there is ownership, and child objects can not belong to another parent object.
- Association is the process where model elements cooperate to provide higher-level behavior.
- Association is a relationship where all objects have their own life cycles and there is no owner.
Q31. Which is NOT one of the basic types of inheritance?
- multilevel inheritance
- double inheritance
- single inheritance
- hierarchical inheritance
Q32. Why is code duplication so insidious?
- The duplication uses unnecessary space.
- One has to maintain all the duplicates.
- Duplication can cause intellectual property concerns.
- Duplication is easy to hide.
Q33. When and how often is a static constructor called?
- It is called initially when an object is created and called with every new object instance.
- It is called when an object is destroyed and only one time.
- It is called initially when an object is created and only one time.
- It is created at time when the object is discarded.
Q34. What does the code shown below demonstrate, and why?
static void Multiply(int num1, int num2) {}; static void Multiply(double num1, double num2, double num3) {}; static void Multiply(float num1, float num2) {};
- polymorphism, because each method can perform different task
- method overriding, because it display the same method name, different or same parameters, and same return type
- method overloading, because it allows the creation of several methods with the same name, wich differ by the type of input via parameter
- method overriding, because it display the same method name, different parameters, and same return type
Q35. What is the purpose os static constructor?
- to initialize all the members with static value
- to delete the static members when not required
- to initialize the static members of class
- to clear all the static members’ initialized values
Q36. What are CRC Cards?
- Code Responsibility Collection cards are a brainstorming tool used in the design of procedural software
- Class responsible collaboration cards are a brainstorming tool used in the design of oop software
- Code Responsibility Correction cards are tools used for debugging
- Code Responsibility Correction cards are tools for modeling
Q37.1 How are contents of a composition different from those of aggregation?
- if one element of an aggregation is dereferenced, all its elements are eligible for garbage collection
- if a composition dies, the contents die
- the contents of a composition are all siblings
- an aggregation contains only abstract classes
Q37.2 Which statement about compositions and aggregations is true?
- if one element of an aggregation is dereferenced, all its elements are eligible for garbage collection
- if a composition dies, the contents die
- the contents of a composition are all siblings
- an aggregation contains only abstract classes
Q38. What is the result of using more abstraction?
- it can increase code vulnerability
- it can make code unsafe
- it can limit code readability
- it can be safer for coding
Q39. Which is false for a member function of a class?
- they can be defined only inside or outside the class body
- the can be made to be friends of another class
- they do not need to be declared inside the class definiton
- they need to be defined
Q40. Why is inheritance used when creating a new class?
- to protect attributes from unwanted changes
- to delegate coding responsibility more efficiently
- to conserve memory
- to avoid writing duplicate code
Q41. In addition to attributes and behaviours, what quality must a class possess?
- a name
- a state
- a color
- an object
Q42. Which type of function among the following shows polymorphism?
- inline function
- undefined function
- virtual function
- class member function
Q43. Which words in the following list are candidates for objects: trumpet, clean, enrage, leaf, tree, collapse, active, and lively?
- leaf and tree
- clean, enrage, and collapse
- clean, active, and lively
- leaf, tree, and trumpet
Q44. What best describes what object-oriented programming does?
- It focuses on objects that interact cleanly with one another.
- It programs exclusively to interfaces.
- It programs exclusively to classes.
- It creates one class for all business logic.
Q45. Can abstract classes be used in multilevel inheritance?
- No, abstract classes can be used only in single-level inheritance since they must be immediately implemented.
- yes, always
- yes, but with only one abstract class
- No, abstract classes do not have constructors.
Q46. What type of inheritance may lead to the diamond problem?
- single level
- multilevel
- hierarchical
- multiple
Q47. How are the contents of a composition different from those of an aggregation?
- The contents of a composition are all siblings.
- An aggregation contains only abstract classes.
- If a composition dies, the contents die.
- If one element of an aggregation is dereferenced, all its elements are eligible for garbage collection.
Q48. What is the relationship between abstraction and encapsulation?
- Abstraction is about making relevant information visible, while encapsulation enables a programmer to implement the desired level of abstraction.
- Abstraction and encapsulation are essentially the same.
- Abstraction and encapsulation are unrelated.
- Encapsulation is about making relevant information visible, while abstraction enables a programmer to implement the desired level of encapsulation.
Q49. Which of these keywords are access specifiers?
- abstract and public
- public and private
- this and final
- final and abstract
Q50. Why is inheritance used when creating a new class?
- to conserve memory
- to protect attributes from unwanted changes
- to separate class behaviour from the more general to the more specific
- to delegate coding responsibility more efficiently
Q51. What is a reference to an object?
- It is the address of variable only — not the method of an object.
- It is a shallow pointer that conatins address of an object.
- It is the physical address of an object.
- It is the address where the variables and methods of an object are stored.
Q52. Why is unit testing harder in OOP than functional programming?
- Objects may maintain internal state, which is not easily accessible by the tests.
- The quality of unit testing frameworks for functional languages is better.
- OOP promotes code reuse, which means that your tests have to consider more use cases.
- Object-oriented languages tend to rely on frameworks such as Spring or Hibernate, which make them difficult to test.
Q53. What is the function of a user diagram?
- It connects actors to use cases.
- It links actors to roles played in all use cases.
- It lists all actors for each use case.
- It minimizes the number of actors required.
Q54. How do object behaviour and attributes differ?
- Behaviour describe dynamic properties; attributes are static.
- Attributes describe a state; behaviours describe a change.
- Attributes apply only to a specified object; behaviour apply to other linked objects.
- Behaviours are vector quantities; attributes are scalars.
Q55. The open/closed principle states that classes should be open for ___ but closed for ____.
- refactoring; duplication
- modification; duplication
- extension; modification
- reuse; encapsulation
Q56. Why would you override a method of a base class?
- to define a method that must be implemented in a derived class
- to define a custom implementation of an inherited member
- to define a method that must be implemented in a superclass only
- to define a class that can be inherited from
Q57. What is a copy constructor?
- It is a unique constructor for creating a new object as a copy of an object that already exists. There will always be only one copy constructor that can be either defined by the user or the system.
- It is a constructor that duplicates itself when requested on-demand.
- It is a common constructor for preventing the creation of a new object as a copy of an object that already exists. There will always be multiple standard constructors that can be either defined by the user or the system.
- It is a constructor that duplicates itself on its own, based on the memory available.
Conclusion
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FAQs
Is this Skill Assessment Test is free?
Yes OOPs Assessment Quiz is totally free on LinkedIn for you. The only thing is needed i.e. your dedication towards learning.
When I will get Skill Badge?
Yes, if will Pass the Skill Assessment Test, then you will earn a skill badge that will reflect in your LinkedIn profile. For passing in LinkedIn Skill Assessment, you must score 70% or higher, then only you will get you skill badge.
How to participate in skill quiz assessment?
It’s good practice to update and tweak your LinkedIn profile every few months. After all, life is dynamic and (I hope) you’re always learning new skills. You will notice a button under the Skills & Endorsements tab within your LinkedIn Profile: ‘Take skill quiz.‘ Upon clicking, you will choose your desire skill test quiz and complete your assessment.
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