Self test 1

Reference Types

Which of the following is a valid way to create an alias for a variable in C++? Note that data types are excluded for simplicity.

  • &refVariable = variable RIGHT

  • *refVariable = variable //derefrence; assign value hold by pointer refVariable by variable

  • refVariable = &variable //refVariable should be a pointer, point to address of variable

  • refVariable = *variable //refVaribale takes value hold by pointer variable

Passing Reference Types

What is the side-effect of passing a reference type into a function?

  • You have to know the data type before passing a reference type

  • Modifying the reference in the function modifies the value in memory RIGHT

  • Modifying the reference in the function only modifies a copy of the value

  • You must use the ref keyword in the function prototype

Pointer Variables

Why must you provide a data type for a pointer variable even though pointer variables only store memory addresses?

  • The complier needs to know how much to request for any value that will be stored in that memory location RIGHT

  • The compiler will create a temporary value of that type and store it in the memory location to prevent it being overwritten

  • It isn't necessary NOT RIGHT

  • It let's other programmers know what data to store in that pointer NOT RIGHT

PreviousManaging Memory in C++ - Dynamic Memory Allocation with ClassesNextLab instructions

Last updated