Q. What do we call the pictorial representation that uses predefined symbols to describe either the logic of a computer program or the data flow and processing steps of a system? 
Answer: Flow Chart
Notes: The correct answer is "Flow Chart." A flow chart is a diagram that represents a process or algorithm using standardized symbols, such as ovals for start/end, rectangles for processes, and diamonds for decisions. Flow charts are widely used in programming and systems design to visualize the flow of control and data, making complex processes easier to understand. They originated in the 1920s and became popular in the 1940s with the advent of computer programming.