C++ MCQs with answers Page - 13

Here, you will find a collection of MCQ questions on C++. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. Objects created using new operator are stored in __ memory.

  • (A) Cache
  • (B) Heap
  • (C) Stack
  • (D) None of the above.

A

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Q. With respective to streams >> (operator) is called as

  • (A) Insertion operator
  • (B) Extraction operator
  • (C) Right shift operator
  • (D) Left shift operator

A

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Q. What is the output of the following program?

Code: 
#include 
using namespace std;
 
int main () {
   // local variable declaration:
   int x = 1;

   switch(x) {
   case 1 :
      cout << "Hi!" << endl; 
      break;
   default :
      cout << "Hello!" << endl;
   }
}
  • (A) Hello
  • (B) Hi
  • (C) HelloHi
  • (D) Compiler error

A

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Q. What is the output of the following program?

Code:
  • (A) 1
  • (B) 0
  • (C) 2
  • (D) Compiler error

A

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Q. Which of the following is CPP style type-casting?

  • (A) per = total/(float)m
  • (B) per = total/float(m)
  • (C) per = (float)total/m
  • (D) None of these

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Q. If a program uses Inline Function, then the function is expanded inline at ___________.

  • (A) Compile time
  • (B) Run time
  • (C) Both a and b
  • (D) None of these

A

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Q. Which of the following is/are valid ways to allocate memory for an integer by dynamic memory allocation in CPP?

  • (A) int *p = new int(100);
  • (B) int *p; p = new int; *p = 100;
  • (C) int *p = NULL; p = new int; *p=100;
  • (D) All of the above

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Q. Which of the following is the perfect set of operators that can’t be overloaded in CPP ?

  • (A) +=, ?, :: , >>
  • (B) >>, <<, ?, *, sizeof()
  • (C) :: , . , .* , ?:
  • (D) :: , ->, * , new, delete

A

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Q. Static variable in a class is initialized when _____ .

  • (A) every object of the class is created.
  • (B) last object of the class is created.
  • (C) first object of the class is created.
  • (D) No need to initialize static variable.

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Q. To perform File I/O operations, we must use _____________ header file.

  • (A) < ifstream>
  • (B) < ofstream>
  • (C) < fstream>
  • (D) Any of these

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