Computer Hardware Devices

This is an input device.

audio response means a device that enables a computer to give a spoken response by generating sound similar to human speech so both a and b are correct option

The location where input/output devices are connected to the computer is known as port.

A trackball is essentially an upside-down mouse - you rotate a ball with your thumb or fingers to control cursor movement, just as a joystick is manipulated by hand to control movement on screen. Both trackballs and joysticks are pointing devices that involve direct manual manipulation to control position, whereas a mouse is moved across a surface and a light pen is dragged across the screen. Trackballs and joysticks share the same fundamental operational principle.

Option (4) is the correct answer.

A CRT (Cathode Ray Tube) monitor consists of several key components: the phosphor screen that glows when struck by electrons, the shadow mask that ensures electrons hit the correct phosphor dots, and the electron gun that emits the electron beam. Gas plasma is an entirely different display technology used in flat-panel displays, not in CRT monitors. This is a knowledge-based question about CRT monitor architecture.

Option (1) is correct.

Option (1) is correct.

Input device is used to bring information into a computer.

USB or Universal Serial Bus is a connectivity port in the computer that connects various devices with USB interface. This is a plug and play port that does not require additional software for a device to work. It is often used to connect mouse, keyboard and pen drives.

System bus is a communication channel which is used by the different units of computer system for transferring data among them.

Digital scanner is not a computing device.

A touch pad (touchscreen) uses switch contacts placed under a plastic pad that can be inscribed with symbols. When pressure is applied to specific areas, the underlying contacts make connection, registering input. This is characteristic of resistive touch technology where two conductive layers with contacts are separated by a spacer. Punched cards use holes, soft keyboards are virtual interfaces, and mice use optical/trackball sensors.

This is the correct answer. We can talk to our near and dear ones while sitting at home with a telephone.

Keystroke logging, often referred to as keylogging or keyboard capturing, is the action of recording (or logging) the keys struck on a keyboard, typically in a covert manner so that the person using the keyboard is unaware that their actions are being monitored.