10+ Interview Questions and Answers

A class is a blueprint for creating objects, while an object is an instance of a class. Classes define the properties and behaviors of objects.

• A class is a template for creating objects with similar properties and behaviors

• An object is an instance of a class, created using the class blueprint

• Classes can have attributes (variables) and methods (functions)

• Objects can interact with each other by calling methods on each other

• Example: Class 'Car' defines properties like 'color' an...read more

Lists are mutable, ordered collections of items, while tuples are immutable, ordered collections. Dictionaries are key-value pairs.

• Lists are denoted by square brackets [], tuples by parentheses (), and dictionaries by curly braces {}.

• Lists can be modified after creation, while tuples cannot be changed once created.

• Dictionaries store data in key-value pairs, allowing for quick lookups based on keys.

• Example: list = [1, 2, 3], tuple = (4, 5, 6), dict = {'key1': 'value1', 'key2':...read more

AC and DC are two types of electrical current. AC changes direction periodically while DC flows in one direction only.

• AC stands for Alternating Current while DC stands for Direct Current

• AC changes direction periodically while DC flows in one direction only

• AC is used for power transmission over long distances while DC is used for electronic devices

• AC voltage can be easily stepped up or down using transformers while DC voltage cannot be easily transformed

• Examples of AC devices ...read more

Identifying the right keywords involves research, analysis, and understanding of target audience.

• Start by brainstorming relevant keywords related to your product or service

• Use keyword research tools like Google Keyword Planner, SEMrush, or Ahrefs

• Consider search volume, competition, and relevance of keywords

• Look at what keywords competitors are using

• Analyze the performance of keywords through metrics like click-through rate and conversion rate

On-page SEO refers to optimizing individual web pages to rank higher and earn more relevant traffic in search engines. Off-page SEO refers to actions taken outside of your own website to impact your rankings within search engine results pages.

• On-page SEO includes optimizing content, meta tags, headings, images, and URLs on your website.

• Off-page SEO involves building backlinks, social media marketing, and influencer outreach to improve your website's authority and reputation.

• E...read more

To solve unapproved ads, review ad policies, make necessary changes, resubmit for approval, and monitor for compliance.

• Review ad policies to identify reasons for disapproval

• Make necessary changes to the ad content or targeting

• Resubmit the ad for approval

• Monitor the ad performance to ensure compliance with policies

AC is used in long transmission due to its ability to be easily stepped up or down in voltage.

• AC can be easily transformed to higher or lower voltages using transformers

• AC has less power loss over long distances compared to DC

• AC generators are more efficient and cost-effective than DC generators for power generation

Communication is the process of exchanging information, ideas, thoughts, or feelings between individuals or groups.

• Communication involves both verbal and non-verbal methods.

• Effective communication requires active listening and clear expression.

• Examples include speaking, writing, body language, and gestures.

• Communication can be one-way or two-way.

• Feedback is essential for successful communication.

A diode is a two-terminal electronic component that allows current to flow in one direction only, while a transistor is a three-terminal electronic component that can amplify or switch electronic signals.

• Diode has two terminals, anode and cathode, and allows current to flow in one direction only

• Transistor has three terminals, base, emitter, and collector, and can amplify or switch electronic signals

• Diodes are used in rectifiers, voltage regulators, and signal demodulation

• Tran...read more

Sampling theorem states that a continuous signal can be accurately represented by discrete samples if the sampling rate is at least twice the highest frequency component of the signal.

• Sampling theorem is also known as Nyquist-Shannon sampling theorem.

• It is used in digital signal processing to convert analog signals into digital signals.

• According to the theorem, the sampling rate must be at least twice the frequency of the signal to avoid aliasing.

• Aliasing occurs when the samp...read more

A microprocessor is a small electronic device that functions as the central processing unit of a computer.

• Microprocessors are made up of millions of tiny components like transistors, resistors, and capacitors.

• They execute instructions and perform calculations for various tasks.

• Examples of microprocessors include Intel's Core i7, AMD's Ryzen, and ARM's Cortex series.

Power factor is the ratio of real power to apparent power in an AC circuit.

• It measures how efficiently electrical power is being used.

• A power factor of 1 means all the power is being used effectively.

• A power factor less than 1 means some power is being wasted.

• Inductive loads like motors have a lagging power factor while capacitive loads have a leading power factor.

Modulation is the process of varying a carrier signal's properties, such as amplitude, frequency, or phase, to transmit information.

• Modulation is used in telecommunications to encode information on a carrier signal.

• There are different types of modulation, including amplitude modulation (AM), frequency modulation (FM), and phase modulation (PM).

• Examples of modulation include AM radio broadcasting, FM radio broadcasting, and digital modulation techniques like QAM (Quadrature Am...read more

Nyquist plot is a graphical representation of a system's frequency response in the complex plane.

• Nyquist plot shows how a system responds to sinusoidal inputs at different frequencies.

• It plots the real part of the transfer function against the imaginary part.

• The plot can help analyze stability and performance of control systems.

• A Nyquist plot can be used to determine the stability of a system by looking at the encirclements of the -1 point.

• It is commonly used in control theor...read more

Ohm's law states that the current flowing through a conductor is directly proportional to the voltage across it, and inversely proportional to the resistance of the conductor.

• Ohm's law is represented by the formula V = I * R, where V is voltage, I is current, and R is resistance.

• It helps in understanding the relationship between voltage, current, and resistance in an electrical circuit.

• It is named after the German physicist Georg Simon Ohm who first formulated it in 1827.

Modulation is the process of varying a carrier signal's properties to transmit information.

• Types of modulation include amplitude modulation (AM), frequency modulation (FM), and phase modulation (PM)

• AM varies the amplitude of the carrier signal based on the input signal

• FM varies the frequency of the carrier signal based on the input signal

• PM varies the phase of the carrier signal based on the input signal