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Correct option is (a) PRE Increment is FASTER than post-increment

To EXPLAIN I would say: Because Pre Increment take one-byte INSTRUCTION & post increment TAKES two-byte instruction.

The CORRECT ANSWER is (a) A OPERATOR+(argument_list){}

The EXPLANATION is: The general SYNTAX for operator overloading is:

 return_type operator_keywordOperator(argument_list){}

eg.

 A opeartor+(argument_list){}

The CORRECT CHOICE is (C) 3

Explanation: There are three types of access SPECIFIERS. They are public, protected and private.

Correct choice is (c) 3

The explanation: There are THREE types of user-defined DATA types. They are TYPEDEF, union, ENUMERATOR.

Correct choice is (a) INCLUDE

Explanation: The include keyword is used to include all the required things to execute the GIVEN CODE in the PROGRAM.

Right OPTION is (B) or

The best explanation: | OPERATOR is used to find the ‘or’ of GIVEN values.

The CORRECT CHOICE is (b) complex

Easy explanation - header file is used for DECLARING a complex number in C++.

Correct answer is (d) |=

Easiest explanation - When an operator overlaoded function is declared as FRIEND function then [], () and -> cannot be overloaded.

Correct choice is (a) 1

Easiest explanation - The SUBSCRIPT OPERATOR overload TAKES only ONE argument, but it can be of any type.

Correct answer is (a) FRIEND class1 CLASS2;

The BEST explanation: In option a, the class2 is the friend of class1 and it can ACCESS all the PRIVATE and protected members of class1.

Correct choice is (c) 3

To explain I WOULD SAY: There are 3 different approaches used for OPERATOR overloading:

i. Overloading unary operator.

ii. Overloading binary operator.

iii. Overloading binary operator using a FRIEND function.

Right choice is (b) whole PROGRAM

The explanation is: We are defining the user-defined data type to be availed only inside that program, if we want to USE ANYWHERE means we have to define those types in the HEADER file.

Correct answer is (c) declarations

The BEST I can EXPLAIN: In the header FILE, we define something that to be MANIPULATED in the program.

Correct answer is (d) SIZE of the heap MEMORY is limited by the size of the RAM and the swap memory

Easy EXPLANATION - Size of the heap memory is limited by the size of the RAM and the swap memory.

The correct choice is (a) 1

Easy explanation - In the CASE of friend OPERATOR overloaded functions UNARY operator overloaded function should take MAXIMUM one object argument only.

Correct choice is (d) It allow one same PORTION of MEMORY to be accessed as different data types

The best EXPLANATION: Union is used to define the data types of our choice and it will STORE the data type in one location MAKE them accessible.

The correct answer is (a) typedef does not CREATE different types. It only creates synonyms of EXISTING types

Explanation: By USING typedef, we can create a TYPE of pre-existing type only not our own type of data.

The correct option is (b) Using this POINTER

For explanation: In CLASSES objects are self-referenced using this pointer INSIDE the member functions. for EXAMPLE this->value to access the data member value of that object.

Correct OPTION is (b) delete the OBJECTS after processing

Easy explanation - When you allocate memory from the HEAP, you must remember to CLEAN up objects when you’re done! Failure to do so is called a memory LEAK.

The correct ANSWER is (C) Friend functions can be invoked as a normal function

To EXPLAIN I WOULD say: Friend functions are not in the scope of a CLASS and hence cannot be called through a class object. A friend function can access all types of members of the class. They can be invoked as a normal function.

The CORRECT answer is (d) all of the mentioned

The explanation is: Inline functions are avoided in all the above cases as whole inline CODE is COPIED to the point of call so compiler avoids to make large functions as inline. Even if you yourself MENTION inline but the FUNCTION is large compiler ignores your request of inline and treats that function as a normal function.

Right choice is (B) h

Easiest explanation - .h extensions are used for user defined header files. To INCLUDE a user defined header file ONE should USE #include”name.h” i.e. enclosed within double quotes.

Right answer is (B) EXTERN

The best I can explain: Extern KEYWORD is USED to represent identifiers from other programs.

Correct OPTION is (b) 2

The best I can EXPLAIN: C++ provides the following two TYPES of string representations. They are C-style CHARACTER string and string class type with STANDARD C++.

Correct answer is (c) ARRAY

The best explanation: To access any element of an array we use following syntax array[i], where i is CALLED subscript representing the ith element of an array, WHEREAS no such cases in char and STRINGS.

Correct choice is (a) SETRLIMIT()

The EXPLANATION: setrlimit() is used to unlimit the size of the STACK.

The correct OPTION is (b) PRIVATE

To EXPLAIN: By DEFAULT all the data members and member functions of class are private.

Correct answer is (C) STRING objects have a dynamic size

To explain: String objects are dynamic in nature i.e. their size varies as their VALUE changes so they don’t use any EXTRA memory and it is not NECESSARY to terminate a string object by ‘\0’.

Correct choice is (C) A friend function MAY or may not be a member of another class

Best explanation: A friend function may or may not be a member of another class is the correct STATEMENT.

The CORRECT choice is (a) MEMORY HEAP

The best EXPLANATION: Memory heap will store the large objects in C++ if it extends its allocated memory.

Right option is (c) TYPEDEF

Best explanation: Typedef is used to DEFINE USER DEFINED datatypes.

eg:

typedef int INT;

INT a;

here INT is used defined data TYPE.

The correct option is (b) MACROS looks like FUNCTION CALLS but they are ACTUALLY not

Easy explanation - Macros in C++ looks like function calls but actually they are not function calls.

Right CHOICE is (B)

EASY explanation - stringstream is available under the header file in C++.

Right answer is (c) both increment & decrement

Easiest explanation - Because increment and decrement operator increases INCREASING and decreasing VALUES of values and no such things define in strings so cannot be used with strings. Also they cannot be used with floats and DOUBLES because there is no way to fix how MUCH the value should be INCREASED or decreased if increment or decrement operator is applied on such variables. That’s why both these operators only works with integer values.

Correct CHOICE is (b) left to RIGHT

For explanation: left to right is the associativity of ADD(+);.

Right ANSWER is (b) complex(3, 4)

The best I can explain: We can DECLARE the complex number by using complex(3,4) where 3 is a real number and 4 is IMAGINARY PART.

The CORRECT answer is (a) iostream is a standard header and iostream.h is a non-standard header

For EXPLANATION: The iostream.h is USED in the older versions of c++ and iostream is EVOLVED from it in the std namespace.

Correct choice is (C) 3

Easy EXPLANATION - There are THREE types of LINKAGE in c++. They are an internal linkage, external linkage, and no linkage.