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Interview Questions and Answer on Functions in C++ : (10)

Question: 1

Find the output of below C++ program? #include<iostream>

void Execute(int &x, int y = 200)
{
 int TEMP = x + y;
 x+= TEMP;
 if(y!=200)
     std::cout<<TEMP<<x<<y<<"--";
}

int main()
{
 int A=50, B=20;
 std::cout<<A<<B<<"--";
 Execute(A,B);
 std::cout<<A<<B<<"--";
 return 0;
}

(A) 5020--5020--
(B) 5020--7012020--12020--
(C) 5020--70120200--5020
(D) 5020--7050200--5020--

Compiler
Level: Practitioner Category: function
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Question: 2

Can we overload functions in C++?

(A) Yes
(B) No
(C) Compilation Error
(D) Runtime Error

Compiler
Level: Beginner Category: function
[Posted by: | ]

Question: 3

Can any function call itself?

(A) Yes
(B) No
(C) Compilation Error
(D) Runtime Error

Compiler
Level: Beginner Category: function
[Posted by: | ]

Question: 4

Is it good idea to return an address or a reference of a local variable?

(A) Yes
(B) No

Compiler
Level: Beginner Category: function
[Posted by: | ]

Question: 5

How to stop Name Mangling in C++?

(A) It is not possible
(B) It is possible only with C code
(C) By using extern "C" keyword
(D) By Converting C++ code to C

Compiler
Level: Practitioner Category: function
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Question: 6

Can we call virtual function using object?

(A) Yes
(B) No

Compiler
Level: Expert Category: function
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Question: 7

What is the best way to convert int to string according to C++ standard?

(A) char *intStr = itoa(a); string str = string(intStr);
(B) std::string s = std::to_string(42);
(C) char stringNum[20]; int num=100; sprintf(stringNum,"%d",num);
(D) None of the above

Compiler
Level: Expert Category: function
[Posted by: | ]

Question: 8

What is true ? when we explicitly declare a function to use the __fastcall convention.

(A) Arguments are placed in registers
(B) Arguments are placed in stack
(C) Arguments are placed in Heap
(D) None of the above

Compiler
Level: Expert Category: function
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Question: 9

Which one of these is not calling convention?

(A) cdecl
(B) syscall
(C) pascal
(D) register

Compiler
Level: Expert Category: function
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Question: 10

What type of function is not a member of a class, but has access to the private members of the class.

(A) Static function
(B) constructor
(C) destructor
(D) friend

Compiler
Level: Practitioner Category: function
[Posted by: | ]

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Interview Questions and Answer on Functions in C++ : (10)

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