Related InterviewSolutions

• Why is downcasting possible in any language?(a) Because inheritance follows has-a relationship(b) Because inheritance follows is-a relationship(c) Because inheritance doesn’t follow any relationship(d) Because inheritance is not involved in castingI had been asked this question in homework.My doubt stems from Downcasting topic in section Default Arguments vs Overloading, Upcasting and Downcasting of Object Oriented Programming
• When is the downcasting used?(a) To separate inherited class from base class(b) To write a more complex code(c) To compare two objects(d) To disable one class in inheritanceI have been asked this question during a job interview.I'm obligated to ask this question of Downcasting in section Default Arguments vs Overloading, Upcasting and Downcasting of Object Oriented Programming
• What happens when downcasting is done but not explicitly defined in syntax?(a) Compile time error(b) Runtime error(c) Code write time error(d) Conversion errorI had been asked this question in an interview for job.Asked question is from Downcasting in chapter Default Arguments vs Overloading, Upcasting and Downcasting of Object Oriented Programming
• Which way the downcasting is possible with respect to inheritance?(a) Upward the inheritance order(b) Downward the inheritance order(c) Either upward or downward the inheritance order(d) Order of inheritance doesn’t matterI have been asked this question in homework.I'd like to ask this question from Downcasting in chapter Default Arguments vs Overloading, Upcasting and Downcasting of Object Oriented Programming
• Java supports direct downcasting.(a) True(b) FalseThis question was addressed to me in unit test.The origin of the question is Downcasting in section Default Arguments vs Overloading, Upcasting and Downcasting of Object Oriented Programming
• How to prevent the ClassCastExceptions?(a) By using instanceof(b) By using is-a check(c) By using arrow operator with check function(d) By checking type of conversionI have been asked this question during an interview.The above asked question is from Downcasting topic in portion Default Arguments vs Overloading, Upcasting and Downcasting of Object Oriented Programming
• Which is the exception handler for the exceptions of downcasting?(a) CastException(b) ClassCastingExeption(c) ClassCasting(d) ClassCastExceptionThe question was asked during an online interview.Enquiry is from Downcasting topic in chapter Default Arguments vs Overloading, Upcasting and Downcasting of Object Oriented Programming
• Which is the proper syntax of dynamic_cast?(a) dynamic_cast(object)(b) dynamic_cast new (object)(c) dynamic_cast(object)(d) dynamic_cast(object)This question was addressed to me in my homework.Question is from Downcasting in section Default Arguments vs Overloading, Upcasting and Downcasting of Object Oriented Programming
• If dynamic_cast fails, which value is returned?(a) void(b) null(c) void pointer(d) null pointerI had been asked this question in an internship interview.This key question is from Downcasting in division Default Arguments vs Overloading, Upcasting and Downcasting of Object Oriented Programming
• What does dynamic_cast return after successful type casting?(a) Address of object which is converted(b) Address of object that is used for conversion(c) Address of object that is mentioned in the syntax(d) Doesn’t return any addressI had been asked this question during an interview for a job.My question comes from Downcasting topic in division Default Arguments vs Overloading, Upcasting and Downcasting of Object Oriented Programming