FH/Moodle Quiz: C++

Questions

• C/C++: Undefined behavior

  Statement	True	False
  When an action is said to lead to undefined behavior, this means that the program will crash		n
  When an action is said to lead to undefined behavior, this means that the program could crash	y
  When an action is said to lead to undefined behavior, this means that the program will continue but will wreak havoc on its data		n
  When an action is said to lead to undefined behavior, this means that the program could continue but could wreak havoc on its data	y

• C++: const: which of the following statements are true?

  Statement	True	False
  A variable declared const can only be initialized and never modified.	y
  A variable of type int which is declared const is initialized to 0 if no initializer is given.		n
  Class members cannot be declared const		n
  const class member variables can be initialized in the constructor body		n
  A method declared const promises to the compiler (and the caller) that a call to it does not modify the object it is called on	y
  Declaring a class constructor const leads to undefined behavior		n

• C++ references: which of the following statements are true?

  Statement	True	False
  A reference variable can be left uninitialized		n
  A caller that passes a variable to a function/method as a reference must take into account that the variable could be modified	y
  A caller that passes a variable to a function/method as a const reference must take into account that the variable could be modified		n

• C++ Overloading: which of the followings statements are true?

  Statement	True	False
  In C++, there cannot be multiple definitions of a function with the same name		n
  In C++, there can be multiple definitions of a function, just with different parameters	y
  The term overloading refers to a technique where one can have multiple definitions of a class, and use them interchangeably		n

• C++ Constructors: which of the following statements are true?

  Statement	True	False
  A default constructor initializes an object when no initialization parameters are given	y
  A copy constructor need only be implemented when member-wise copy is not sufficient	y
  A copy constructor must be implemented in any case		n

• STL: which of the following statements are true?

  Statement	True	False
  std::vector<> guarantees that it keeps elements in contiguous memory	y
  In a std::vector<> instance that contains three elements, accessing index 3 (vec[3]) leads to undefined behavior	y
  In a std::vector<> instance that contains three elements, accessing index 0 (vec[0]) leads to undefined behavior		n

Dependencies