W & W Engineering Interview Questions and Answers

Power supplied from a socket is alternating current (AC).

• Most household sockets provide AC power

• AC power changes direction periodically

• DC power is commonly used in batteries and some electronics

Typical voltage supplied by an electrical socket is 120 volts, while the current can vary depending on the country and type of socket.

• Voltage supplied by an electrical socket is typically around 120 volts

• Current supplied can vary depending on the country and type of socket

• In the US, standard electrical sockets provide 120 volts AC at 15-20 amps

• In Europe, standard electrical sockets provide 230 volts AC at 16 amps

To measure current with a multimeter, set the multimeter to the current measurement mode, connect the multimeter in series with the circuit, and read the current value displayed on the multimeter.

• Set the multimeter to the current measurement mode (usually denoted by 'A' for Amperes)

• Turn off the power to the circuit before connecting the multimeter in series

• Connect the multimeter in series with the circuit - place the multimeter in the path of the current flow

• Read the current ...read more

Arduino Uno has 14 digital pins and 6 analog pins for coding programs.

• Arduino Uno has 14 digital pins (0-13) and 6 analog pins (A0-A5)

• Digital pins can be used for input/output operations while analog pins can read analog signals

• To code programs in Arduino, you can use the Arduino IDE and write C/C++ based sketches

Discrete components are individual electronic components that are separate and distinct from each other.

• Discrete components are used to build electronic circuits.

• They are separate and distinct from integrated circuits.

• Examples of discrete components include resistors, capacitors, transistors, and diodes.

An ultrasonic sensor is a device that uses sound waves with frequencies higher than the upper audible limit of human hearing to measure distances.

• Ultrasonic sensors emit high-frequency sound waves and measure the time it takes for the waves to bounce back after hitting an object.

• They are commonly used for distance measurement, object detection, and obstacle avoidance.

• Ultrasonic sensors can be found in various applications such as parking sensors, robotics, industrial automati...read more

The OSI model is a conceptual framework that standardizes the functions of a communication system into seven layers.

• The OSI model stands for Open Systems Interconnection model.

• It was developed by the International Organization for Standardization (ISO) in 1984.

• The model divides the communication process into seven layers, each with its own specific functions and protocols.

• The layers are: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each laye...read more