A computer monitor is also known by the name:

Correct option is D

Sol. A Computer Monitor is also known as a Visual display unit (VDU).
 A VDU is a machine with a screen which is used to display information from a computer.
 A Visual Display Unit (VDU) is a device that  displays text and graphics on a screen.
  It consists of millions of tiny light particles called pixels, which are arranged in vertical and horizontal lines to form the image. Measuring the color and brightness of each pixel is done by controlling the electron gun at every point on the screen and therefore forming an image.
 CPU is considered as the brain of the computer.
 CPU performs all types of data processing operations.
 CPU stores data, intermediate results, and instructions (program).It controls the operation of all parts of the computer.
 CPU itself has following three components.
1. Memory or Storage Unit
2. Control Unit
3. ALU(Arithmetic Logic Unit)
 LED stands for Light Emitting Diode
 CCTV stands for Closed Circuit Television, and it refers to a system that uses video cameras to transmit signals to a specific, limited set of monitors.