10+ Interview Questions and Answers

Smart metering refers to the use of advanced metering infrastructure (AMI) to track and manage energy consumption in real-time.

• Smart metering allows for remote monitoring and control of energy usage

• AMI systems enable two-way communication between the utility company and the meter

• AMISP stands for Advanced Metering Infrastructure Service Provider

• Smart meters can help consumers track their energy usage and make more informed decisions

• Smart metering can lead to more efficient ene...read more

Real power is the actual power consumed by a circuit, while apparent power is the combination of real power and reactive power.

• Real power is measured in watts and represents the actual power consumed by a circuit.

• Apparent power is the combination of real power and reactive power, measured in volt-amperes.

• The relationship between real power, apparent power, and reactive power is described by the power triangle.

• In an ideal circuit with no reactive power, real power and apparent...read more

Abstract class can have both abstract and non-abstract methods, while Interface can only have abstract methods.

• Abstract class can have constructor, fields, and methods, while Interface cannot have any of these.

• A class can extend only one abstract class, but can implement multiple interfaces.

• Abstract class is used to provide a common base for multiple classes, while Interface is used to define a contract for classes to implement.

• Example: Abstract class 'Shape' with abstract me...read more

Power factor is calculated by dividing the real power (kW) by the apparent power (kVA).

• Power factor = Real Power (kW) / Apparent Power (kVA)

• Power factor is a measure of how effectively electrical power is being used in a system.

• A power factor of 1 indicates all the power is being used effectively, while a power factor of 0 means none of the power is being used effectively.

Loader class is a class in Java that dynamically loads Java classes at runtime.

• Loader class is part of Java's class loading mechanism.

• It is responsible for loading classes into the Java Virtual Machine (JVM) during runtime.

• There are different types of class loaders in Java, such as Bootstrap Class Loader, Extension Class Loader, and Application Class Loader.

A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Transformers consist of two coils of wire, known as the primary and secondary coils, wrapped around a core made of ferromagnetic material.

• They are used to step up or step down voltage levels in electrical power transmission and distribution systems.

• Common types of transformers include distribution transformers, power transformers, and instrument transforme...read more