………… enable us to hide, inside the object, both the data fields and the methods that act on that  data.
A) Encapsulation
B) Polymorphism
C) Inheritance
D) Overloading

1 Answer

Answer :

A) Encapsulation

Related questions

Description : …………. Is the process of creating new classes, called derived classes from existing classes called base class. A) Inheritance B) Encapsulation C) Polymorphism D) Overloading

Last Answer : A) Inheritance

Description : .................. allows to create classes which are derived from other classes, so that they automatically include some of its "parent's" members, plus its own members. (A) Overloading (B) Inheritance (C) Polymorphism (D) Encapsulation 

Last Answer : (B) Inheritance

Description : Module design is used to maximize cohesion and minimize coupling. Which of the following is the key to implement this rule? (A) Inheritance (B) Polymorphism (C) Encapsulation (D) Abstraction

Last Answer : (C) Encapsulation

Description : Which of the following correctly describes overloading of functions? (A) Virtual polymorphism (B) Transient polymorphism (C) Ad-hoc polymorphism (D) Pseudo polymorphism

Last Answer : (C) Ad-hoc polymorphism

Description : Abstraction and encapsulation are fundamental principles that underlie the object oriented approach to software development. What can you say about the following two statements? I. Abstraction allows us to focus on what something ... and II are correct. (3) Only II is correct. (4) Only I is correct.

Last Answer : (1) Neither I nor II is correct.

Description : In C++, polymorphism requires: (A) Inheritance only (B) Virtual functions only (C) References only (D) Inheritance, Virtual functions and references

Last Answer : (D) Inheritance, Virtual functions and references 

Description : The “part-whole”, or “a-part-of”, relationship in which objects representing the components of something associated with an object representing the entire assembly is called as (A) Association (B) Aggregation (C) Encapsulation (D) Generalisation

Last Answer : (B) Aggregation

Description : Which among the following definitions are correct: a) Object - Any entity that has state and behavior is known as an object. b) Class - Collection of objects is called class. It is logical entity. c) ... re-usability and is used to achieve run time polymorphism. d) All of the above e) None of These

Last Answer : d) All of the above

Description : Polymorphism is implemented using function overloading. Justify the statement.

Last Answer : Polymorphism is a mechanism that allows a developer to have more than one function with same name but different signature. In function overloading, one can make use of more than one function with different signature as well. Hence ... main()  { int a[10],i,isum; float b[5],fsum; clrscr(); cout

Description : Describe following terms: Inheritance, data abstraction, data encapsulation, dynamic binding.

Last Answer : Inheritance: 1. Inheritance is the process by which objects of one class acquire the properties of objects of another class. 2. It supports the concept of hierarchical classification. It also provides the ... with a given procedure call is not known until the time of the call at run-time.

Description : When the inheritance is private, the private methods in base class are.................. in the derived class (in C++). (A) inaccessible (B) accessible (C) protected (D) public

Last Answer : (A) inaccessible

Description : In ……………………. mode, a common technique in packet-switched networks consists of wrapping a packet in a new one. A) Tunneling B) Encapsulation C) Both A and B D) None of the above

Last Answer : C) Both A and B

Description : ....................... is the key to .................. A) Serialization, persistence B) Persistence, inheritance C) Inheritance, object D) Persistence, serialization

Last Answer : A) Serialization, persistence

Description : ....................is the key to ........................ A) Serialization, persistence B) Persistence, inheritance C) Inheritance, object D) Persistence, serialization

Last Answer : C) Inheritance, object

Description : Define the following: a. Aggregation among objects. b. Class. c. Repeated inheritance. d. Encapsulation. e. Scenario.

Last Answer : Ans: a).Aggregation among objects Aggregation among objects represents a relationship. It is a whole/part relationship. Aggregation may imply containment. b).Class A class is a template that specifies the ... or it can be shown as an event trace diagram in which events between objects are shown.

Description : Which of the following statements concerning Object-Oriented databases is FALSE? (A) Objects in an object-oriented database contain not only data but also methods for processing the data. (B ... Object-oriented databases store more types of data than relational databases and access that data faster.

Last Answer : (C) Object-oriented databases are more adapt at handling structures (analytical) data than relational databases.

Description : What is Encapsulation? How is it implemented in Java?

Last Answer : A: Binding up of data and associated functions together into a single unit called (class) is called Encapsulation. In Java, it is implemented by the use of a class.

Description : Which of the following cloud concept is related to pooling and sharing of resources? a) Polymorphism b) Abstraction c) Virtualization d) None of the mentioned

Last Answer : Virtualization

Description : What is Polymorphism? How is it implemented in Java?

Last Answer : A: It literally means the ability to take ‘more than one forms’. The ability of a method to behave in more than one form is called polymorphism. In Java, it is implemented by method (function) overloading (compile time polymorphism) and method overriding (runtime polymorphism).

Description : What is the difference between function overloading and function overriding?

Last Answer : A: In function overloading only the function name is same but function signature (list of parameters) is different, whereas, in function overriding both the function name as well as function ... is an example of static polymorphism, whereas, function overriding is an example of dynamic polymorphism.

Description : Which of the following is true about Java. A) Java does not support overloading. B) Java has replaced the destructor function of C++ C) There are no header files in Java. D) All of the above.

Last Answer : D) All of the above

Description : State True or False. i) While overloading operators new operator can be overloaded. ii) The binary operator such as +, -, * and must explicitly return a value. A) True, True B) True, False C) False, True D) False, False

Last Answer : C) False, True

Description : Which of the following differentiates between overloaded functions and overridden functions ? (A) Overloading is a dynamic or runtime binding and overridden is a static or compile time binding. ... function overloading, while redefining a function in a friend class is called function overriding.

Last Answer : (B) Overloading is a static or compile time binding and overriding is dynamic or runtime binding.

Description : State true or false for Java Program. i) Data members of an interface are by default final ii) An abstract class has implementations of all methods defined inside it. A) i-false, ii-false B) i-false, ii-true C) i-true, ii-false D) i-true, ii-true

Last Answer : C) i-true, ii-false

Description : Consider the following statements for priority queue: S1: It is a data structure in which the intrinsic ordering of the elements does determine the result of its basic operations. S2: The elements of a priority queue ... . (C) SI is incorrect and S2 is correct. (D) Both S1 and S2 are correct.

Last Answer : (D) Both S1 and S2 are correct.

Description : The major goal of inheritance in C++ is A) To facilitate the conversion of data types B) To help modular programming C) To facilitate the reusability of code D) To extend the capabilities of a class

Last Answer : D) To extend the capabilities of a class

Description : The relational model is based on the concept that data is organized and stored in two-dimensional tables called ………………………A) Fields B) Records C) Relations D) Keys

Last Answer : C) Relations

Description : Which of the following control fields in TCP header is used to specify the sender has no more data to transmit? (A) FIN (B) RST (C) SYN (D) PSH

Last Answer : (A) FIN 

Description : ...................... of a remotely accessible object must implement ................ A) all methods, RemoteException B) class, RemoteException C) class, RemoteInterface D) all methods, RemoteInterface

Last Answer : C) class, RemoteInterface

Description : The concept of multiple inheritance is implemented in Java by A) extending two or more classes B) extending one class and implementing one or more interfaces C) implementing two or more interfaces D) both B and C

Last Answer : D) both B and C

Description : The concept of multiple inheritance is implemented in Java by A) extending two or more classes B) extending one class and implementing one or more interfaces C) implementing two or more interfaces D) both B and C

Last Answer : D) both B and C

Description : Consider the following two statements: (a) A publicly derived class is a subtype of its base class. (b) Inheritance provides for code reuse. Which of the following statements is correct? (A) Both the statements ( ... ) is correct and (b) is incorrect (D) Statement (a) is incorrect and (b) is correct

Last Answer : Answer: A

Description : In Unix, the command to enable execution permission for file “mylife” by all is ................ (A) Chmod ugo+X myfile (B) Chmod a+X myfile (C) Chmod +X myfile (D) All of the above

Last Answer : (D) All of the above

Description : Briefly explain encapsulation and why it is important in object-oriented - programming.

Last Answer : Encapsulation is the principle that all of the data and functionality required by an object be contained by that object. This allows objects to exist as independent, interchangeable units of functionality without maintaining dependencies on other units of code.

Description : PCR and restriction fragment length polymorphism are the methods for (a) study of enzymes (b) genetic transformation (c) DNA sequencing (d) genetic fingerprinting.

Last Answer : (d) genetic fingerprinting.

Description : . …………………….. is a form of virus explicitly designed to hide itself from detection by antivirus software. A) Stealth virus B) Polymorphic Virus C) Parasitic Virus D) Macro Virus

Last Answer : A) Stealth virus

Description : The out object is an object encapsulated inside the ................. class, and represents the standard output device. A) standard B) local C) globlal D) system

Last Answer : D) system

Description : One of the principal advantage of object oriented programming techniques over procedural programming techniques is that they enable programmers to create ______that do not need to be changed when a new type of object is added: a) Networks b) Modules c) Data Slates d) None of These

Last Answer : b) Modules

Description : Superficially the term object-oriented , means that, we organize software as a (A) collection of continuous objects that incorporates both data structure and behaviour. (B) collection of ... and behaviour. (D) collection of objects that incorporates both discrete data structure and behaviour.

Last Answer : (C) collection of discrete objects that incorporates both data structure and behaviour.

Description : Subschema can be used to A. create very different, personalized views of the samedata B. present information in different formats C. hide sensitive informationby omitting fields from thesub¬schema's description D. All of theabove E. None of the above

Last Answer : All of theabove

Description : What is the benefit of Inheritance?

Last Answer : A: It is a very useful feature as it provides the concept of reusability. Also, it allows us to include or remove any features to an existing class without modifying it.

Description : What is Inheritance? How is it implemented in Java?

Last Answer : A: The ability of a class to adopt/share the properties (data and functions) completely or partially from another class is called Inheritance. In Java, it is implemented by the use of the keyword, extends.

Description : State true or false. i) init() is called after start() in applet ii) applets are used for networking iii) inheritance is a part of Java Foundation Classes iv) final does not prevent inheritance A) i-true, ii- ... C) i-true, ii-true, iii-true, iv-true D) i-true, ii-false, iii-false, iv-false

Last Answer : B) i-false, ii-false, iii-false, iv-false

Description : Data input is A) an abstract class defined in java.io B) a class we can use to read primitive data types C) an interface that defines methods to open files. D) an interface that defines methods to read primitive data types.

Last Answer : D) an interface that defines methods to read primitive data types.

Description : Data input is A) an abstract class defined in java.io B) a class we can use to read primitive data types C) an interface that defines methods to open files. D) an interface that defines methods to read primitive data types.

Last Answer : D) an interface that defines methods to read primitive data types.

Description : Which of the following, in C++, is inherited in a derived class from base class ? (A) constructor (B) destructor (C) data members (D) virtual methods

Last Answer : (C) data members

Description : In a relational schema, each tuple is divided into fields called A) Relations B) Domains C) Queries D) All of the above

Last Answer : B) Domains

Description : Which of the following fields in IPv4 datagram is not related to fragmentation? (A) Type of service (B) Fragment offset (C) Flags (D) Identification

Last Answer : (A) Type of service 

Description : Which of the following statements is true (A) Abstract data types are the same as classes (B) Abstract data types do not allow inheritance (C) Classes cannot inherit from the same base class (D) Object have state and behavior

Last Answer : (B) Abstract data types do not allow inheritance