Description : Implicit return type of a class constructor is: (A) not of class type itself (B) class type itself (B) a destructor of class type (D) a destructor not of class type
Last Answer : (B) class type itself
Description : Write a program to declare class having data member as hrs, mins, secs. Write constructor to assign values and destructor to destroy values. Accept & display data for one object.
Last Answer : #include<iostream.h> #include<conio.h> class time { private: int hrs, mins,sec; public: time(int h,int m,int s) { hrs=h; mins=m; sec=s; } ~time() { cout<< hours ... } }; void main() { time t(2,43,56); t.display(); getch(); }
Description : If a base class has a number of overloaded constructors, and an inheriting class has a number of overloaded constructors; can you enforce a call from an inherited constructor to a specific base constructor?
Last Answer : Yes, just place a colon, and then keyword base (parameter list to invoke the appropriate constructor) in the overloaded constructor definition inside the inherited class.
Description : If a base class has a bunch of overloaded constructors, and an inherited class has another bunch of overloaded constructors, can you enforce a call from an inherited constructor to an arbitrary base constructor?
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 : Describe with examples, passing parameters to base class constructor and derived class constructor by creating object of derived class.
Last Answer : When a class is declared, a constructor can be declared inside the class to initialize data members. When a base class contains a constructor with one or more arguments then it is mandatory for the derived class to have a ... #include class base { int x; public: base(int a) { x=a; cout
Description : Which of the following statement(s) with regard to an abstract class in JAVA is/are TRUE? I. An abstract class is one that is not used to create objects. II. An abstract class is designed only to act as a base class ... by other classes. (1) Only l (2) Only II (3) Neither I nor II (4) Both l and II
Last Answer : Both l and II
Description : Which of the following characteristics of constructor are true. i) They should be declared in the public section. ii) They are invoked automatically when the objects are created. iii) They do not have return type and void also. ... and v C) Only i, iii, iv and v D) All i, ii, iii, iv and v
Last Answer : D) All i, ii, iii, iv and v
Description : Is constructor or destructor inheritance explicit or implicit? What does this mean?
Last Answer : Constructor or destructor inheritance is explicit…. Public Extended : base() this is called the constructor initializer.
Description : Differentiate between constructor and destructor.
Last Answer : Differentiate between constructor and destructor.
Description : Are constructors inherited? Can a subclass call the parent's class constructor? When?
Last Answer : Ans. You cannot inherit a constructor. That is, you cannot create a instance of a subclass using a constructor of one of it's superclasses. One of the main reasons is because ... developer the ability to override a superclasses constructor you would erode the encapsulation abilities of the language.
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 : …………. 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 : 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 : A ……………. takes a reference to an object of the same class as itself as an argument. A) Reference constructor B) Copy Constructor C) Self Constructor
Last Answer : B) Copy Constructor
Description : What is constructor? How user can declared constructor in derived class? Explain with example.
Last Answer : Constructor:- Constructor is a special member function which has same name as a class name and is used to initialize object during compile time of program. Declaring constructor in derived class If a base class contains a ... derived d(2,5); d.displaybase(); d.display(); getch(); }
Description : Explain constructor in derived class with suitable example.
Last Answer : When a class is declared, a constructor can be declared inside the class to initialize data members. When a base class contains a constructor with one or more arguments then it is ... one argument. Derived class constructor accepts two values and passes one value to base class constructor.
Description : Write a C++ program to declare a class student with members as roll no, name and department. Declare a parameterized constructor with default value for department as ‘CO’ to initialize members of object. Initialize and display data for two students.
Last Answer : write a C plus plus program to declare a class which accept and display student information such as roll number division and percentage use get data and put data with required parameters
Description : Write a C++ program to declare a class addition with data members as x and y. Initialize values of x and y with constructor. Calculate addition and display it using function ‘display’.
Last Answer : #include<iostream.h> #include<conio.h> class addition { int x,y; public: addition(int,int); void display(); }; addition::addition (int x1,int y1) { x=x1; y=y1; } void addition: ... y); } void main() { addition a(3,4); a.display(); getch(); }
Description : Write a program to declare class student having data members name and percentage. Write constructor to initialize these data members. Accept and display this data for one object.
Last Answer : #include<iostream.h> #include<conio.h> #include<string.h> class student { char name[20]; float per; public: student(char n[],float p) { strcpy(name,n); per=p; } ... { student S("Sachin",78.00); clrscr(); S.putdata(); getch(); }
Description : Write a program in C++ to declare a class measure having data members as add 1, add 2, add 3. Initialize the values of two data members using constructor and display their addition using function.
Last Answer : #include<iostream.h> #include<conio.h> class measure { public: int add1,add2,add3; measure(int a,int b) { add1=a; add2=b; } void cal() { add3=add1+add2; } void display() ... ;>a>>b; measure m1(a, b); m1.cal(); m1.display(); getch(); }
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) A destructor never takes any argument nor does it return any value. ii) It releases memory space for future use. A) True, True B) True, False C) False, True D) False, False
Last Answer : A) True, True
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 : 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 : What is super constructor?
Last Answer : A: It is a constructor which is used to call the constructor of the super class and hence initialize the data members of the super class from within the sub class.
Description : What is the similarity between a method and a constructor?
Last Answer : A: Below are some of the similarities: 1) Both of them are member methods of any class. 2) Both can be parameterised or non-parameterised. 3) Both can be overloaded.
Description : What is a copy constructor?
Last Answer : A: It is a constructor which takes object as parameter and copies the value of the instance variable of that object to another object (creates a copy of an object).
Description : What is a constructor?
Last Answer : A: It is a member function with the same name as that of a class and is automatically called for initializing the variables of an object.
Description : Automatic initialization of object is carried out using a special member function called ………… A) Friend B) Casting C) Reference Parameter D) Constructor
Last Answer : D) Constructor
Description : A constructor that accepts no parameters is called the ………………. A) Paramless constructor B) No parameter constructor C) Default constructor D) Argumentless constructor
Last Answer : C) Default constructor
Description : All java classes are derived from A) java.lang.Class B) java.util.Name C) java.lang.Object D) java.awt.Window
Last Answer : D) java.awt.Window
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 : Write a program to implement single inheritance. Declare base class employee with Emp_No. and Emp_Name. Declare derived class fitness with height and weight. Accept and display data for one employee.
Last Answer : #include<iostream.h> #include<conio.h> class employee { protected: int emp_no; char emp_name[10]; public: void gete() { cout<< enter employee details ; cin>>emp_no; cin>> ... f.gete(); f.pute(); f.getft(); f.putft(); getch(); }
Description : Equivalence partitioning is a .................. method that divides the input domain of a program into classes of data from which test cases can be derived. (A) White-box testing (B) Black-box testing (C) Orthogonal array testing (D) Stress testing
Last Answer : (B) Black-box testing
Description : Which of the following statement(s) is/are TRUE with regard to software testing? I. Regression testing technique ensures that the software product runs correctly after the changes during maintenance. II. Equivalence partitioning is a ... (1) only I (2) only II (3) both I and II (4) neither I nor II
Last Answer : (1) only I
Description : Which of the following is not a member of class ? (A) Static function (B) Friend function (C) Const function (D) Virtual function
Last Answer : (B) Friend function
Description : Which of the following is used to make an Abstract class ? (A) Making atleast one member function as pure virtual function (B) Making atleast one member function as virtual function (C) Declaring as Abstract class using virtual keyword (D) Declaring as Abstract class using static keyword
Last Answer : (A) Making atleast one member function as pure virtual function
Description : Can you prevent your class from being inherited and becoming a base class for some other classes?
Last Answer : Yes, that’s what keyword sealed in the class definition is for. The developer trying to derive from your class will get a message: cannot inherit from Sealed class WhateverBaseClassName. It’s the same concept as final class in Java.
Description : Virtual constructor: Constructors cannot be virtual. Declaring a constructor as a virtual function is a syntax error. Does c++ support multilevel and multiple inheritance?
Last Answer : Yes.
Description : .A normal green male maize is crossed with albino female. The progeny is albino because (a) trait for a albinism is dominant (b) the albinos have biochemical to destroy plastids derived from green male (c) plastids are inherited from female parent (d) green plastids of male must have mutated.
Last Answer : (c) plastids are inherited from female paren
Description : A thread is usually defined as a light weight process because an Operating System (OS) maintains smaller data structure for a thread than for a process. In relation to this, which of the following ... separate stack for each thread. (D) OS does not maintain virtual memory state for each thread.
Last Answer : (B) OS maintains only CPU registers for each thread.
Description : Which of the following methods belong to the string class? A) length( ) B) compare To ( ) C) equals ( ) D) All of them
Last Answer : D) All of them
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 : State true or false for Java Program. i) All class variables are instance variables ii) All protected methods are friendly methods A) i-false, ii-false B) i-false, ii-true
Last Answer : B) i-false, ii-true
Description : When a program class implements an interface, it must provide behavior for A) two methods defined in that interface B) any methods in a class C) only certain methods in that interface D) all methods defined in that interface
Last Answer : D) all methods defined in that interface
Description : State True or False. i) A satic function can have access to only other static members (functions or variables) declared in the same class. ii) A static member function can be called using the class name (instead of its objects) A) True, True B) True, False C) False, True D) False, False
Last Answer : B) True, False