Free Test Conversion constructor... – C++ Lan...

Q1: What is a conversion constructor in C++?

A. A constructor that converts one type to another B. A constructor that converts an object to a string C. A constructor that performs explicit cast only D. A function that converts operator types

Q2: How do you declare a conversion constructor?

A. ClassName(Type param); B. operator Type(); C. ClassName operator Type(); D. void operator=(Type);

Q3: What is a conversion operator?

A. A member function to convert object to another type B. A constructor for type conversion C. An operator to overload assignment D. An operator for pointer conversion

Q4: Which of the following is correct syntax for conversion operator to int?

A. operator int() const; B. int operator() const; C. operator int(const); D. operator const int();

Q5: Can conversion constructors be marked explicit?

A. Yes B. No C. Only in C D. Only for templates

Q6: What happens if you do not mark a conversion constructor explicit?

A. It allows implicit conversions B. It disables conversions C. Compiler error D. Overloads operator=

Q7: Which keyword is used to prevent implicit conversions by constructors?

A. explicit B. inline C. const D. virtual

Q8: Can conversion operators be explicit in C++11 and later?

A. Yes B. No C. Only for pointers D. Only for references

Q9: Which of these can cause ambiguous calls?

A. Multiple conversion constructors B. Multiple assignment operators C. Multiple destructors D. Multiple main functions

Q10: Is conversion operator syntax similar to operator overloading syntax?

A. Yes B. No C. Only for arithmetic operators D. Only for logical operators

Q11: What is the return type of a conversion operator?

A. The converted type B. void C. int D. A pointer

Q12: Can conversion operators be overloaded?

A. No, only one per type B. Yes, multiple with different return types C. Only for class types D. Only for int and float

Q13: Which is true about conversion constructors and assignment operators?

A. They are different and serve different purposes B. They are the same C. Conversion constructor calls assignment operator D. Assignment operator is a kind of conversion constructor

Q14: Can conversion constructors be explicit?

A. Yes, to disable implicit conversion B. No C. Only if return type is void D. Only for friend functions

Q15: What is the default behavior if no conversion operator is provided?

A. No implicit conversion to that type B. Automatic conversion by compiler C. Compiler error D. Undefined behavior

Q16: Can conversion constructors accept more than one argument?

A. No, only one argument allowed B. Yes, multiple arguments C. Only two arguments allowed D. Three or more arguments allowed

Q17: How do conversion operators affect implicit conversion?

A. They enable object to type conversion B. They disable conversions C. They overload assignment D. They overload functions

Q18: Which is a correct way to define conversion operator inside class?

A. class A { public: operator int() { return 10; } }; B. class A { int operator int() { return 10; } }; C. class A { void operator int() { } }; D. class A { operator void() { } };

Q19: What is a common use of conversion constructors?

A. To convert from primitive types to user-defined types B. To convert user-defined types to primitive types C. To overload arithmetic operators D. To define destructors

Quiz for Conversion constructors and conversion operators