1. Which of the following is used to include header files in a C++ program?
A) #include
B) #define
C) #header
D) #import
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2. Which of the following is true about a static variable in C++?
A) It is a global variable
B) It is reinitialized with each function call
C) It cannot hold a constant value
D) It retains its value between function calls
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3. Which keyword is used to deallocate memory allocated by 'new' in C++?
A) free
B) delete
C) remove
D) clear
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4. What will be the output of the following code?for(int i=1; i<4; i++) { cout << i*2; }
A) 246
B) 135
C) 123
D) Error
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5. What does the 'break' statement do in a C++ loop?
A) Skips the current iteration
B) Exits the loop
C) Run for infinite
D) Restarts the loop
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6. What is true about a constructor in C++?
A) It can return an int value
B) It cannot return any value
C) It can return a pointer
D) It can return a boolean
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7. What is the purpose of a virtual function in C++?
A) To allow polymorphic behavior
B) To avoid function overloading
C) To create abstract classes
D) To override operators
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8. Which of the following is the ternary operator in C++?
A) &&
B) ||
C) ??
D) ?:
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9. What is the size of a char in C++?
A) 1 byte
B) 2 bytes
C) 4 bytes
D) System dependent
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10. When is a destructor called in C++?
B) When an object goes out of scope or is deleted
A) At the beginning of a program
C) When a class is defined
D) Manually only
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11. What is true about references in C++?
A) They cannot be null
B) They can be reassigned
C) They are pointers
D) They require dynamic allocation
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12. What does the 'const' keyword do in C++?
A) Allows variable to change
B) Makes variable a pointer
C) Changes variable type
D) Prevents variable from changing
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13. What happens when a derived class object is created in C++?
A) Base class constructor is called first
B) Derived class constructor is called first
C) Only the derived class constructor runs
D) No constructor is called
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14. What will be the output of the following code?cout << 'Hello' << 'World';
A) HelloWorld
B) Hello World
C) Error
D) WorldHello
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15. Which keyword is used for dynamic memory allocation in C++?
A) malloc
B) new
C) allocate
D) create
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16. What will be the output of the following code?int i=0; cout << i++ << i;
A) 0 0
B) 0 1
C) 1 1
D) 0 1
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17. Which operator is used to cast away constness in C++?
A) dynamic_cast
B) const_cast
C) reinterpret_cast
D) static_cast
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18. What happens when you call a virtual function from a base class pointer pointing to a derived class object?
A) The derived class version is called
B) The base class version is called
C) No function is called
D) Error occurs
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19. What is true about a pure virtual function in C++?
A) It has a definition
B) It can be called directly
C) It must be overridden in derived classes
D) It is not needed in derived classes
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20. When is the destructor of a class called in C++?
A) When the program starts
B) When the program ends
C) When an object goes out of scope
D) When the object is created
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