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The correct option is (C) ->

Easy explanation - this pointer is a TYPE of pointer and as we know pointer object USES the arrow(->) operator to access the MEMBERS of the CLASS, therefore, this pointer uses -> operator.

Correct OPTION is (a) To access the members of a class which have the same NAME as local variables in that scope

Best explanation: this POINTER is used to access the members of a class which have the same name as local variables in that part of the CODE.

The correct option is (C) STATIC data MEMBERS functions can ACCESS only static data members

Best EXPLANATION: Static member functions can access static data members only. Static member functions can be overloaded. Static data members can be accessed by non-static member functions.

Right choice is (B) this pointer is passed as a HIDDEN argument in all non-static FUNCTIONS of a class

To explain I would SAY: As static functions are a type of global function for a class so all the object shares the common instance of that static function whereas all the objects have there own instance for non-static functions and HENCE they are passed as a hidden argument in all the non-static members but not in static members.

Right option is (b) Structure in C++ ALLOWS Constructor DEFINITION

To explain I would SAY: As C does not allow the programmer to define a function INSIDE a structure and constructor itself is a function, therefore, the constructor definition is not ALLOWED in C whereas such definitions are allowed in C++.

The CORRECT CHOICE is (a) The process of adding more information to a function NAME so that it can be DISTINGUISHED from other functions by the compiler

The explanation is: Name mangling is the process of adding some more information to a function name so that it can be distinguished from other functions by the compiler. This is used when a programmer uses the CONCEPT of function overloading in his/her program.

Right ANSWER is (a) In static POLYMORPHISM, the CONFLICT between the function call is resolved during the compile TIME

Explanation: The conflict between which function to call is resolved during the compile time in static polymorphism i.e. before the execution of the program starts.

Correct CHOICE is (a) STATIC polymorphism

The best I can EXPLAIN: Compile-time polymorphism is ALSO known as static polymorphism as it is implemented during the compile-time.

Correct OPTION is (C) Array ELEMENT access

Best EXPLANATION: Array element has left to right associativity i.e. expressions are EVALUATED from left to right in case of array element access.

The correct choice is (a) struct STRUCT S;

To explain: C PROGRAM REQUIRES struct keyword while DEFINING a variable of any structure, therefore, we cannot use the second STRUCT S; definition to DECLARE a variable.

The correct CHOICE is (b) Dynamic polymorphism

Best EXPLANATION: Run-time polymorphism is also known as dynamic polymorphism as it is implemented during the run-time of the PROGRAM.

Right choice is (c) 1 and 1

The best explanation: The size of a character type in both C and C++ is 1. You can do PRINTF(“%d”, (int)SIZEOF(char)); in both C and C++ to CHECK this.

Right answer is (b) std is a standard namespace in C++

Best explanation: std is a standard namespace present in C++ which CONTAINS different stream classes and OBJECTS like cin, cout, ETC. and other standard functions.

The correct choice is (b) All MEMBERS of a class

The EXPLANATION is: A MEMBER function of a class can access all the members of its class whether they are PRIVATE, protected or public.

Correct CHOICE is (b) In DYNAMIC polymorphism, the conflict between the function call is resolved during the RUN TIME

The explanation is: The conflict between which function to call is resolved during the run time in dynamic polymorphism i.e. the conflict is resolved when the execution REACHES the function call statement.

The correct OPTION is (d) both while and for

The BEST I can explain: Both while and for LOOPS are called entry controlled loop because in both of them the termination condition is checked before we enter the BODY of the loop hence they are called entry controlled loop.

The CORRECT choice is (d) All of the mentioned

The best explanation: Friend functions can ACCESS any member of a CLASS without caring about the type of member i.e. without caring whether it is private, protected or PUBLIC.

Correct answer is (C) Dynamic LOADING

The BEST I can explain: Dynamic loading is the concept of adding NEW COMPONENTS to a program as it runs.

Right option is (b) Member functions

The EXPLANATION: Functions of a CLASS are also KNOWN as member functions of a class.

The correct choice is (C) VAR_1234

For explanation: The rules for writing an identifier is as follows:

i) may CONTAIN lowercase/uppercase letters, digits or UNDERSCORE(_) only

ii) should START with a non-digit character

iii) should not contain any SPECIAL characters like @, $, etc.

The correct option is (a) 1 bit

The EXPLANATION: BOOLEAN uses only 1 bit as it STORES only TRUTH values which can be true(1) or FALSE(0).

The CORRECT choice is (B) <<

Explanation: COUT in C++ uses << operator to print anything so << operator is overloaded for a cout OBJECT.

The correct OPTION is (C) class

The explanation: Class is used as an abstract DATA TYPE as it can be used to give implementation independent view WHEREAS no other data type can be used to provide this.

The CORRECT choice is (B) 2

The EXPLANATION: There are two types of polymorphism in C++ NAMELY run-time and compile-time POLYMORPHISMS.

Right option is (b) STRUCTURES can have MEMBER functions

Explanation: THOUGH C does not allows member functions in structures but C++ allows structures to have member functions. Members of structures are public by default and those of classes are private by default. Classes can have PROTECTED data members.

The correct answer is (c) CONSTRUCTORS

The best explanation: Virtual keyword cannot be USED with constructors as constructors are defined to initialized an object of particular class hence no other class NEEDS CONSTRUCTOR of other class.

Correct option is (c) Using Templates

Explanation: Compile-time polymorphism is IMPLEMENTED using templates in which the TYPES(which can be checked during compile-time) are USED DECIDES which function to be called.

Right choice is (b) II

The explanation: In II PART the termination CONDITION of the for loop is CHECKED.

Right choice is (a) cout.put(ch)

Explanation: C++ provides cout.put() FUNCTION to WRITE a single character to console whereas others are used to write EITHER a single or multiple CHARACTERS.

Right answer is (d) By DECLARING a pure virtual FUNCTION in a class

Best EXPLANATION: Abstract class should have at least one pure virtual function. Therefore to declare an abstract class one should declare a pure virtual function in a class.

Right option is (a) Virtual functions

Explanation: Virtual functions are used to implement the concept of LATE BINDING i.e. binding actual functions to their calls.

Right choice is (a) \r

Best explanation: \r is USED to represent CARRIAGE return which MEANS move the cursor to the beginning of the next line.

Correct answer is (a) CIN

The BEST I can EXPLAIN: C++ uses cin to read INPUT FORM uses. However C++ also uses scanf().

Right answer is (b) The process of linking the actual code with a procedural call during compile-time

The BEST explanation: BINDING of calls and VARIABLES with actual code at compile-time is called static binding. For example normally whenever we declare a variable we DEFINE its TYPE hence compiler knows what type should be binded to that variable i.e. compiler can decide about that variable this is called static binding.

Correct option is (d) C++ allows both static and dynamic type CHECKING

Easy explanation - C++ allows both static and dynamic type checking i.e. TYPES are checked by the COMPILER.

Right option is (C) Singleton class

Explanation: Singleton class allows the programmer to declare only ONE OBJECT of it, If one TRIES to declare more than one object the program RESULTS into error.

Correct choice is (a) PARAMETERS with which functions are called

Explanation: ACTUAL parameters are those using which a FUNCTION CALL is made i.e. which are actually passed in a function when that function is called.

The correct answer is (d) All of the mentioned

Easiest EXPLANATION - References cannot be made null whereas a pointer can be. References cannot be changed whereas pointers can be modified.

 Pointers need * operator to dereference the VALUE PRESENT INSIDE it whereas reference does not need an operator for dereferencing.

Correct answer is (d) It reduced both testing and maintenance TIME

The EXPLANATION: As we will be using the existing code THEREFORE we don’t need to check the code again and again so testing and maintenance time decreases but the compiler time may increase or remains same because though we are reusing the code but every PART needs to be compiled and EXTRA include statement needs to be executed therefore compilation time may remain same or increases.

Correct ANSWER is (d) Using Inheritance and Virtual functions

Easy EXPLANATION - Run-time POLYMORPHISM is IMPLEMENTED using Inheritance and virtual in which object decides which function to call.