Programming Languages NTA UGC NET Question Analysis

Programming Languages NTA UGC NET Question Analysis

Q1➡ |
A member function can always access the data in ……………. ,(in C++).

i ➥ the class of which it is member

ii ➥ the object of which it is a member

iii ➥ the public part of its class

iv ➥ the private part of its class

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Answer: I
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Q2➡ |
‘*ptrdata’ is a pointer to a data type. The expression *ptrdata++ is evaluated as (in C++):

i ➥ *(ptrdata++)

ii ➥ (*ptrdata++)

iii ➥ (*ptrdata++)

iv ➥ *(ptrdata)++

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Answer: I
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Q3➡ |
The associativity of which of the following operators is Left to Right, in C++?

i ➥ Unary Operator

ii ➥ Logical not

iii ➥ Array element access

iv ➥ addressof

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Answer: III
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Q4➡ |
If a function is friend of a class, which one of the following is wrong?

i ➥ A function can only be declared a friend by a class itself.

ii ➥ Friend functions are not members of a class, they are associated with it.

iii ➥ Friend functions are members of a class.

iv ➥ It can have access to all members of the class, even private ones.

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Answer: III
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Q5➡ |
Which of the following is not a member of class ?

i ➥ Static function

ii ➥ Friend function

iii ➥ Const function

iv ➥ Virtual function

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Answer: II
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Q6➡ |
……………… 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.

i ➥ Overloading

ii ➥ Inheritance

iii ➥ Polymorphism

iv ➥ Encapsulation

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Answer: II
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Q7➡ |
Member of a class specified as …………… are accessible only to method of the class.

i ➥ private

ii ➥ public

iii ➥ protected

iv ➥ derive

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Answer: I
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Q8➡ |
Match the following:
Set-I
(a) Garbage collection in
(b) Nameless object
(c) Template support
(d) A forward reference
(e) Derived class inherits from base class
Set-II
1- Java
2- generic programming
3- defines a class
4- member function
5- within a statement
Codes :
(a) (b) (c) (d) (e)

i ➥ 1 5 4 2 3

ii ➥ 1 5 2 3 4

iii ➥ 5 1 2 3 4

iv ➥ 5 4 3 1 2

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Answer: I (Marks to all )
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Q9➡ |
The data type created by the data abstraction process is called.

i ➥ class

ii ➥ structure

iii ➥ abstract data type

iv ➥ user defined data type

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Answer: III
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Q10➡ |
Which of the statements are true?
I. Function overloading is done at compile time.
II. Protected members are accessible to the member of derived class.
III. A derived class inherits constructors and destructors.
IV. A friend function can be called like a normal function. V. Nested class is a derived class.

i ➥ I, II, III

ii ➥ II, III, V

iii ➥ III, IV, V

iv ➥ I, II, IV

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Answer: IV
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Q11➡ |
A copy constructor is invoked when:

i ➥ a function returns by value

ii ➥ an argument is passed by value

iii ➥ a function returns by reference

iv ➥ none of the above

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Answer: II
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Q12➡ |
How many constructors can a class have?

i ➥ zero

ii ➥ 1

iii ➥ 2

iv ➥ any number

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Answer: IV
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Q13➡ |
Which of the following is true?

i ➥ A “static” member of a class cannot be inherited by its derived class.

ii ➥ A “static” member of a class can be initialized only within the class it is a member of.

iii ➥ A “static” member of a class can be initialized before an object of that class is created.

iv ➥ Since “static” member of a class is actually a global element, it does not require a class/object qualifier to access it independently of class/object.

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Answer: III
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Q14➡ |
What keyword in class specification helps to hide data:

i ➥ Public

ii ➥ Private

iii ➥ Static

iv ➥ Void

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Answer: II
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Q15➡ |
Data members and member function of a class by default is respectively:

i ➥ private and public

ii ➥ public

iii ➥ public and private

iv ➥ private

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Answer: IV
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Q16➡ | Match the following with respect to I/O classes in object
oriented programming :
List – I List – II
a. fopen() i. returns end of file
b. fclose() ii. return for any problem report
c. ferror() iii. returns 0
d. feof() iv. returns a file pointer
Codes :
a,b,c,d

i ➥ iv i ii iii

ii ➥ iii i iv ii

iii ➥ ii iii iv i

iv ➥ iv iii i ii

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Answer: I
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Q17➡ |
Which one of the following is correct, when a class grants friend status to another class?

i ➥ The member functions of the class generating friendship can access the members
of the friend class.

ii ➥ All member functions of the class granted friendship have unrestricted access to
the members of the class granting the friendship.

iii ➥ Class friendship is reciprocal to each other

iv ➥ There is no such concept.

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Answer: II
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Q18➡ |
When a method in a subclass has the same name and type signatures as a method in the super-class, then the method in the subclass ……………… the method in the super-class.

i ➥ Overloads

ii ➥ Friendships

iii ➥ Inherits

iv ➥ Overrides

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Answer: IV
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Q19➡ |
A …………….. is a special method used to initialize the instance variable of a class.

i ➥ Member function

ii ➥ Destructor

iii ➥ Constructor

iv ➥ Structure

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Answer: III
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Q20➡ |
Encapsulation is

i ➥ Dynamic binding

ii ➥ A mechanism to associate the code and data.

iii ➥ Data abstraction

iv ➥ Creating new class

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Answer: II
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Q21➡ |
Assume that we have constructor function for both Base and Derived classes. Now consider the declaration :
main ( )
Base *p = new Derived;
In what sequence, the constructor will be executed?

i ➥ Derived class constructor is followed by Base class constructor.

ii ➥ Base class constructor is followed by Derived class constructor.

iii ➥ Base class constructor is never called.

iv ➥ Derived class constructor is never called.

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Answer: II
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Q22➡ |
Match the following interfaces of Java. Servlet package :
List – I
a. Servlet Config
b. Servlet Context
c. Servlet Request
d. Servlet Response
List – II
i. Enables Servlets to log events
ii. Read data from a client
iii. Write data to a client
iv. To get initialization parameters
Codes :
a b c d

i ➥ ii iv ii i

ii ➥ iii ii iv i

iii ➥ ii iii iv i

iv ➥ iv i ii iii

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Answer: IV
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Q23➡ |
The pure object oriented programming language with extensive metadata available and modifiable at run time is

i ➥ Small talk

ii ➥ C++

iii ➥ Java

iv ➥ Eiffel

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Answer: I
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Q24➡ |
Which method is called first by an applet program ?

i ➥ start( )

ii ➥ run( )

iii ➥ init( )

iv ➥ begin( )

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Answer: III
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Q25➡ |
What is true about UML stereotypes ?

i ➥ Stereotype is used for extending the UML language.

ii ➥ Stereotyped class must be abstract

iii ➥ The stereotype indicates that the UML element cannot be changed

iv ➥ UML profiles can be stereotyped for backward compatibility

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Answer: I
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Q26➡ |
Converting a primitive type data into its corresponding wrapper class object instance is called

i ➥ Boxing

ii ➥ Wrapping

iii ➥ Instantiation

iv ➥ Autoboxing

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Answer: IV
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Q27➡ |
Which one of the following is correct?

i ➥ Java applets cannot be written in any programming language

ii ➥ An applet is not a small program.

iii ➥ An applet can be run on its own.

iv ➥ Applets are embedded in another applications.

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Answer: IV
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Q28➡ |
In Java, when we implement an interface method, it must be declared as:

i ➥ Private

ii ➥ Protected

iii ➥ Public

iv ➥ Friend

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Answer: III
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Q29➡ |
Which of the following is/are correct with reference to Abstract class and interface ?
(a) A class can inherit only one Abstract class but may inherit several interfaces.
(b) An Abstract class can provide complete and default code but an interface has no code.
Codes :

i ➥ a) is true

ii ➥ (b) is true

iii ➥ Both (a) and (b) are true

iv ➥ Neither (a) nor (b) is true

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Answer: III
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Q30➡ |
Match the following with reference to object oriented
modelling :
List – I List – II
(a) Polymorphism (i) Picking both operator and attributes with operations appropriate to model an object
(b) Inheritance (ii) Hiding implementation details of methods from users of objects
(c) Encapsulation (iii) Using similar operations to do similar things
(d) Abstraction (iv) Create new classes from existing class
Codes :
(a) (b) (c) (d)

i ➥ iv) (iii) (i) (ii)

ii ➥ (iii) (iv) (i) (ii)

iii ➥ (iii) (i) (ii) (iv)

iv ➥ iv) (iii) (ii) (i)

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Answer: II
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Q31➡ |
Which of the following is used to make an Abstract class ?

i ➥ Making atleast one member function as pure virtual function

ii ➥ Making atleast one member function as virtual function

iii ➥ Declaring as Abstract class using virtual keyword

iv ➥ Declaring as Abstract class using static keyword

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Answer: I
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Q32➡ |
When one object reference variable is assigned to another object reference variable then

i ➥ a copy of the object is created.

ii ➥ a copy of the reference is created.

iii ➥ a copy of the reference is not created.

iv ➥ it is illegal to assign one object reference variable to another object reference variable.

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Answer: II
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Q33➡ |
Which of the following statements is correct?

i ➥ Every class containing abstract method must not be declared abstract.

ii ➥ Abstract class cannot be directly initiated with ‘new’ operator.

iii ➥ Abstract class cannot be initiated.

iv ➥ Abstract class contains definition of implementation.

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Answer: II,III
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Q34➡ |
Which of the following statements is correct?

i ➥ Aggregation is a strong type of association between two classes with full ownership.

ii ➥ Aggregation is a strong type of association between two classes with partial ownership.

iii ➥ Aggregation is a weak type of association between two classes with partial ownership.

iv ➥ Aggregation is a weak type of association between two classes with full ownership.

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Answer: III
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Q35➡ |
It is possible to define a class within a class termed as nested class. There are ………… types of nested classes.

i ➥ 2

ii ➥ 3

iii ➥ 4

iv ➥ 5

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Answer: I,III
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Q36➡ |
Implicit return type of a class constructor is:

i ➥ not of class type itself

ii ➥ class type itself

iii ➥ a destructor of class type

iv ➥ destructor not of class type

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Answer: II
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Q37➡ |
Which of the following is not a correct statement?

i ➥ Every class containing abstract method must be declared abstract.

ii ➥ Abstract class can directly be initiated with ‘new’ operator.

iii ➥ Abstract class can be initiated.

iv ➥ Abstract class does not contain any definition of implementation.

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Answer: II
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Q38➡ |
Constructors have …………. return type.

i ➥ void

ii ➥ char

iii ➥ int

iv ➥ no

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Answer: IV
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Q39➡ |
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 to be inherited by other classes.

i ➥ Only l

ii ➥ Only II

iii ➥ Neither I nor II

iv ➥ Both l and II

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Answer: IV
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Q40➡ |
Consider the following JAVA program:
public class First
{
public static int CBSE(int x)
{
if (x < 100) x = CBSE (x +10);
return (x – 1);
}
public static void main(String[] args)
{
System.out.print(First.CBSE(60));
}
}
What does this program print?

i ➥ 59

ii ➥ 95

iii ➥ 69

iv ➥ 99

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Answer: IV
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i ➥ 20:20

ii ➥ 18:18

iii ➥ 18:20

iv ➥ 20:18

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Answer: III
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Q42➡ |
The goal of operator overloading is

i ➥ to help the user of a class

ii ➥ to help the developer of a class

iii ➥ to help define friend function

iv ➥ None of the above

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Answer: I
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Q43➡ |
A friend function can be used to

i ➥ avoid arguments between classes.

ii ➥ allow access to classes whose source code is unavailable

iii ➥ allow one class to access an unrelated class.

iv ➥ None of the above

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Answer: III
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Q44➡ |
A function object:

i ➥ is an instance of a class for which operator () is a member function.

ii ➥ is an instance of a class for which operator → is a member function.

iii ➥ is a pointer to any function

iv ➥ is a member function of a class

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Answer: I
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Q44➡ |
If a data-item is declared as a protected access specifier then it can be accessed:

i ➥ Anywhere in the program

ii ➥ By the base and derived classes

iii ➥ Only by base class

iv ➥ Only by derived class

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Answer: II
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Q45➡ |
Runtime polymorphism can be achieved by:

i ➥ Accessing virtual function through the pointer of the base class

ii ➥ Accessing virtual function through the object

iii ➥ The derived class

iv ➥ None of these

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Answer: I
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Q46➡ |
The friend functions are used in situations where:

i ➥ We want to have access to unrelated classes

ii ➥ Dynamic binding is required

iii ➥ Exchange of data between classes to take place

iv ➥ None of the above

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Answer: III
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Q47➡ |
Encapsulation is

i ➥ Dynamic binding

ii ➥ A mechanism to associate the code and data.

iii ➥ Data abstraction

iv ➥ Creating new class

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Answer: II
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Q48➡ |
A …………….. is a special method used to initialize the instance variable of a class.

i ➥ Member function

ii ➥ Destructor

iii ➥ Constructor

iv ➥ Structure

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Answer: III
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Q49➡ |
When a method in a subclass has the same name and typesignatures as a method in the superclass, then the method in the subclass……………… the method in the superclass.

i ➥ Overloads

ii ➥ Friendships

iii ➥ Inherits

iv ➥ Overrides

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Answer: IV
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Q50➡ |
Which one of the following is correct, when a class grants friend status to another class?

i ➥ The member functions of the class generating friendship can access the members of the friend class.

ii ➥ All member functions of the class granted friendship have unrestricted access to the members of the class granting the friendship.

iii ➥ Class friendship is reciprocal to each other

iv ➥ There is no such concept.

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Answer: II
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