Question

C++

C++ Language

1. True/False: You can use pass by reference when passing a C++ unique pointer to a function.

a)True

b)False

2. True/False: A temporary value in a program can be referred to by at most one lvalue reference.

a)True

b)False

3. A unique pointer is a pointer

a		that is declared in a block of code in which it is the only pointer.
b		that is declared in a function in which it is the only pointer.
c		that points to a block of memory, and no other pointer is allowed to point to the same block.
d		that can be dereferenced just one time, and causes a runtime error if it is dereferenced more than once.
e		none of these.

4. True/False: The speed and amount of memory available to modern computers diminishes the performance impact of the overhead of recursion so much that for many applications, this overhead is not noticeable

a)Ture

b)False

Answer 1

1) True

you can pass a std::uniqe_ptr instance to a function by value or by reference. Just note that std::unique_ptr is not copyable but movable.

2)False

3) c-  

that points to a block of memory, and no other pointer is allowed to point to the same block.

4)True

If we had resources like past it would have been very difficult for us to implement recursion.