Solution

The correct answer is A - IV, B - III, C - I, D - II

Key Points

• A. Union - IV. User defined data type: In computer programming, a union is a user-defined data type that allows storing different data types in the same memory location.
• B. Function - III. Subroutine: A function in programming is a type of subroutine that performs a specific task and can return a value.
• C. Interactive Environment - I. Virtual Reality: An interactive environment like virtual reality allows users to interact with a simulated environment in real-time.
• D. Output device - II. Shadow mask: A shadow mask is a component used in CRT monitors (a type of output device) to ensure that the electron beams hit the correct phosphor dots on the screen to produce the desired colors.