C++ Multiple Choice Questions Page 9 of 14

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Question: 161

Which is the correct command used to compile source code (.cpp files) into object code(.o files)?

(A) g++ -o <filename>
(B) g++ -c <filename>
(C) g++ <filename>
(D) g++ -f <filename>

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Level: Expert

Category of MCQ: gcc_g++ in C++

Question: 162

GCC compiler is known as?

(A) The GNU C compiler
(B) GNU C compiler
(C) Generic C compiler
(D) GDB C Compiler

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Level: Beginner

Category of MCQ: gcc_g++ in C++

Question: 163

The command nm on linux lists few symbols. What symbol 'D'represents?

(A) Normal Data Section
(B) Un initialized data section
(C) Initialized data section
(D) None of the above

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Level: Expert

Category of MCQ: other in C++

Question: 164

#include<iostream>
using namespace std;

int main()
{
 int x = 9;
 while (x>0)
 x--;
 cout<<x;

return 0;
}

(A) 9876543210
(B) 987654321
(C) 9
(D) 0

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Level: Practitioner

Category of MCQ: loops in C++

Question: 165

//How many times will A be printed ?

class A
{

public:
    ~A(){
    std::cout <<"A";
    }
};
int main()
{
    A obj;
    obj.~A();
}

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

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Level: Practitioner

Category of MCQ: classesAndobjects in C++

Question: 166

Which of the following is not a C++ 17 library feature?

(A) std::variant
(B) std::optional
(C) std::string_view
(D) None of the above

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Level: Expert

Category of MCQ: cpp17 in C++

Question: 167

Is this a valid syntax in C++ 17?

namespace A::B::C {
  int i;
}

(A) Yes
(B) No

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Level: Expert

Category of MCQ: cpp17 in C++

Question: 168

Is this is a valid UTF-8 character literal? 

char x = u8'x';

(A) Yes
(B) No

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Level: Expert

Category of MCQ: cpp17 in C++

Question: 169

Lambda expression are feature of which C++ version?

(A) C++11
(B) C++14
(C) C++ 17
(D) C++20

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Level: Expert

Category of MCQ: cpp14 in C++

Question: 170

Which C++ version support Digit Separators 1'000'000?

(A) C++11
(B) C++14
(C) C++17
(D) C++20

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Level: Expert

Category of MCQ: cpp20 in C++

Question: 171

Which version of C++ added feature of auto for return type of functions?

(A) C++11
(B) C++14
(C) C++17
(D) C++20

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Level: Expert

Category of MCQ: cpp20 in C++

Question: 172

In which version of C++ auto was limited to lambda functions?

(A) C++11
(B) C++14
(C) C++17
(D) C++20

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Level: Expert

Category of MCQ: cpp20 in C++

Question: 173

What is the correct way to initialize vector in C++?

(A) std::vector<integer> vecOfInts;
(B) std::vector int <vecOfInts>
(C) std::vector(int) vecOfInts;
(D) std::vector<int> vecOfInts;

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Level: Practitioner

Category of MCQ: stl in C++

Question: 174

What is true about his statement in C++?
std::vector<int> vecInts(5);

(A) Initialize a Vector with 5 int & all default value is 0
(B) Initialize a Vector with 5 int
(C) Initialize a Vector with 5 int & all default values will be garbage
(D) Initialize a Vector with 5 int & All default value with be -1

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Level: Practitioner

Category of MCQ: stl in C++

Question: 175

Is it possible to initialize any Vector with an Array in C++?

(A) Yes
(B) No

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Level: Practitioner

Category of MCQ: stl in C++

Question: 176

Will below program run without any compilation errors?
Assume that all header files are included.

int main()
{

std::list<std::string> listOfStr;
listOfStr.push_back("1");
listOfStr.push_back("2");
listOfStr.push_back("3");
listOfStr.push_back("4");
 
// Initialize a vector with std::list
std::vector<std::string> vecOfStr(listOfStr.begin(),listOfStr.end());
 
for(std::string str : vecOfStr)
    std::cout<<str<<std::endl;

return 0;
}

(A) Yes
(B) No

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Level: Practitioner

Category of MCQ: stl in C++

Question: 177

What should be the output of below program? Assume that all header files are included.

int main()
{
std::list<std::string> listOfStr;
listOfStr.push_back("1");
listOfStr.push_back("2");
listOfStr.push_back("3");
listOfStr.push_back("4");
 
// Initialize a vector with std::list
std::vector<std::string> vecOfStr(listOfStr.begin(), listOfStr.end());
 
for(std::string str : vecOfStr)
    std::cout<<str;

return 0;
}

(A) 1 2 3 4
(B) 1234
(C) 12340
(D) 01234

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Level: Practitioner

Category of MCQ: stl in C++

Question: 178

What does this function do?

void func() {
	std::vector<std::string> vecOfString(5, "Hi");
 
	for (std::string str : vecOfStr)
		std::cout << str << std::endl;
 
}

(A) Initialize vect to 5 string with value "Hi"
(B) Initialize vect's first element to a string with value "Hi" & prints them
(C) Initialize vect to 1 string with value "Hi" & prints only one
(D) Initialize vect to 5 string with value "Hi" & prints them

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Level: Practitioner

Category of MCQ: stl in C++

Question: 179

Correct syntax for creating a thread using Function Pointer?
thread_function is the name of function which need to be executed
in separate thread.

(A) std::thread threadObj(thread_function);
(B) std::thread threadObj(&thread_function);
(C) std::thread threadObj((void *)thread_function);
(D) std::thread threadObj(thread_function());

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Level: Expert

Category of MCQ: cpp11 in C++

Question: 180

A struct can contain members of various data types

(A) TRUE
(B) FALSE

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Level: Beginner

Category of MCQ: structure in C++

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