C++ Multiple Choice Questions Page 7 of 14

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Question: 121

Can a parameter be both const and volatile?

(A) Yes
(B) No

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Level: Practitioner

Category of MCQ: keyword in C++

Question: 122

What is/are true statements are const volatile variables?

(A) It is volatile because it can change at any time
(B) It is const because our C program must not try to modify it
(C) Change value outside by means outside our C program
(D) All of these

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Level: Practitioner

Category of MCQ: keyword in C++

Question: 123

What is the advantage of local variable?

(A) It saves memory
(B) It releases memory once it go out of scope
(C) It inrease execution time of program
(D) None of these

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Level: Practitioner

Category of MCQ: other in C++

Question: 124

Which one of these takes more memory?

(A) Pass by Value
(B) Pass by reference
(C) Pass by pointer/address
(D) Depends on Compiler

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Level: Beginner

Category of MCQ: other in C++

Question: 125

Which one of these is invalide file mode?

(A) ios::trunc
(B) ios::ate
(C) ios::app
(D) ios::tellg

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Level: Practitioner

Category of MCQ: other in C++

Question: 126

Which one is correct syntax to use C++11 features while compilation?

(A) g++ -std=c++-11 -o output.out source.cpp
(B) g++ -std=c++11 -o output.out source.cpp
(C) g++ -std=c++ 11 -o output.out source.cpp
(D) g++ -std=cpp11 -o output.out source.cpp

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Level: Expert

Category of MCQ: cpp11 in C++

Question: 127

In the below program 
int main(int argc, char *argv[]){}
what would be the value of argv[argc]?

(A) Filename
(B) First argument
(C) Last argument
(D) NULL pointer

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Level: Expert

Category of MCQ: other in C++

Question: 128

Which one is true ?

(A) We can create link using structure only
(B) We can create link list using class only
(C) We can create link list either by class or structure
(D) We should ignore implementation of link list using structure as it consume more memory

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Level: Beginner

Category of MCQ: other in C++

Question: 129

Which one of the following is correct syntax for nmake command?

(A) nmake -f myfile option
(B) nmake -f opiton myfile
(C) nmake option -f myfile
(D) nmake option -fname myfile

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Level: Expert

Category of MCQ: gcc_g++ in C++

Question: 130

What should be output of below program? program is compiled on g++ compiler.

#include<iostream>
using namespace std;

struct student{	
 char a;  char b;  int c;
};

int main()
{
 cout<<sizeof(student);	
 return 0;
}

(A) 4
(B) 6
(C) 8
(D) 12

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Level: Expert

Category of MCQ: structure in C++

Question: 131

#include<iostream>
using namespace std;

struct student{	
 char a; int c;	char b;
};

int main()
{
    std::cout<<sizeof(student);	
    return 0;
}

(A) 4
(B) 6
(C) 8
(D) 12

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Level: Expert

Category of MCQ: structure in C++

Question: 132

#include<iostream>


struct student{	
    int a; char b; char c;
};

int main()
{
    std::cout<<sizeof(student);	
    return 0;
}

(A) 4
(B) 6
(C) 8
(D) 12

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Level: Expert

Category of MCQ: structure in C++

Question: 133

Is below program of C++ 11 valid & runs without compilation error?
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

void print_square(int i)
{
 cout << i*i << endl;
}
int main()
{
 vector<int> v;
 // vector gets filled
 for_each(v.begin(), v.end(), print_square);
 return 0;
}

(A) Yes
(B) No
(C) Depends on Compiler

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Level: Expert

Category of MCQ: cpp11 in C++

Question: 134

Is this valid C++ 11 program & get compiled without any error?

#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

int main() {

vector<int> v;
// vector gets filled

for_each(v.begin(), v.end(),
[](int i) { cout << i*i << endl; } );

return 0;
}

(A) Yes
(B) No

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Level: Expert

Category of MCQ: cpp11 in C++

Question: 135

Find the output of below program
#include<iostream>
using namespace std;
enum color{
	Black,
	blue,
	red	
};
int main()
{
    color obj = blue;
    cout<<obj;
    return 0;
}

(A) blue
(B) 2
(C) 1
(D) None of these

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Level: Practitioner

Category of MCQ: enum in C++

Question: 136

#include<iostream>

enum color{
	black=1,
	blue,
	red	
};
int main()
{
    color obj = blue;
    std::cout<<obj;
	return 0;
}

(A) blue
(B) Compilation Error
(C) 1
(D) 2

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Level: Practitioner

Category of MCQ: enum in C++

Question: 137

#include<iostream>
using namespace std;
enum color{
	black=1,
	blue,
	red	
};
int main()
{
    color obj = yellow;
    cout<<obj;
    return 0;
}

(A) yellow
(B) black
(C) Compilation Error
(D) 3

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Level: Practitioner

Category of MCQ: enum in C++

Question: 138

#include<iostream>
using namespace std;
enum color{
	black,
	blue,
	red	
};
int main()
{
    color obj;
    cout<<obj;
    return 0;
}

(A) black
(B) 0
(C) -1
(D) Some Garbage Value

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Level: Practitioner

Category of MCQ: enum in C++

Question: 139

What should be the output of below program? Please note all programs are compiled on GCC compiler.
#include<iostream>
using namespace std;
enum color{
	black,
	blue,
	red	
};
int main()
{    
    color obj;
    cout<<sizeof(obj);
    return 0;
}

(A) 0
(B) 1
(C) 2
(D) 4

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Level: Practitioner

Category of MCQ: enum in C++

Question: 140

#include<iostream>

enum color{
	black=-5,
	blue,
	red	
};
int main()
{    
    color obj = blue;
    std::cout<<obj;
    return 0;
}

(A) Compilation Error
(B) 0
(C) 1
(D) -4

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Level: Practitioner

Category of MCQ: enum in C++

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