30+ Interview Questions and Answers

Asynchronous functions in JavaScript allow code to run without blocking other code from executing.

• Asynchronous functions use callbacks or promises to handle the result of the function.

• They are useful for tasks that may take a long time to complete, such as fetching data from a server.

• Examples include setTimeout(), fetch(), and XMLHttpRequest().

Polymorphism is the ability of an object to take on many forms.

• It allows objects of different classes to be treated as if they were objects of the same class.

• It is achieved through method overriding and method overloading.

• Example: A parent class Animal can have child classes like Dog, Cat, and Cow. All of them have a common method called 'makeSound', but each of them makes a different sound.

• Example: A method can be overloaded by having the same name but different parameters, ...read more

Patent is a legal right granted to an inventor to exclude others from making, using, or selling their invention.

• Patent is filed to protect an invention from being copied or used without permission.

• It gives the inventor exclusive rights to make, use, and sell their invention for a certain period of time.

• Patent laws vary by country, but major countries for patent filings include the US, Japan, China, and European countries.

• Patents can cover a wide range of inventions, from mach...read more

Reverse alternate words in a given string

• Split the string into words

• Reverse alternate words using a loop

• Join the words back into a string

Use a hashmap to store the frequency of each letter in the given string.

• Iterate through the string and update the frequency of each letter in the hashmap.

• Return the hashmap containing the frequency of each letter.

Some of the COVID-19 vaccines available worldwide include Pfizer-BioNTech, Moderna, AstraZeneca, Johnson & Johnson, Sinovac, and Sputnik V.

• Pfizer-BioNTech: mRNA vaccine

• Moderna: mRNA vaccine

• AstraZeneca: Viral vector vaccine

• Johnson & Johnson: Viral vector vaccine

• Sinovac: Inactivated vaccine

• Sputnik V: Viral vector vaccine

Random forest is better than decision tree due to its ability to reduce overfitting and handle large datasets.

• Random forest reduces overfitting by averaging multiple decision trees

• Random forest can handle large datasets with high dimensionality

• Random forest is more robust to noise and outliers compared to a single decision tree

Bubble sort is a simple sorting algorithm that repeatedly steps through the list, compares adjacent elements, and swaps them if they are in the wrong order.

• Start at the beginning of the array and compare the first two elements. If the first element is greater than the second, swap them.

• Continue comparing adjacent elements and swapping them if necessary until the end of the array is reached.

• Repeat this process for each element in the array until no more swaps are needed, indic...read more

Photosynthesis is a vital process in which plants convert sunlight into energy by producing glucose and oxygen.

• Photosynthesis occurs in the chloroplasts of plant cells

• It involves the absorption of sunlight, water, and carbon dioxide

• The end products are glucose (sugar) and oxygen

• Plants use glucose as energy for growth and development

Treadmark is a term used to describe the wear and tear on a tire's surface caused by friction with the road.

• Treadmark is the pattern of grooves and ridges on the surface of a tire that provides traction on the road.

• It is important to regularly check the tread depth of tires to ensure they are safe to drive on.

• Tread wear can also be an indicator of other issues with a vehicle's alignment or suspension.

• Examples of tread patterns include directional, asymmetrical, and symmetrica...read more

React is a JavaScript library used for building user interfaces.

• React allows developers to create reusable UI components.

• It uses a virtual DOM for efficient rendering.

• React can be used for building single-page applications.

• It is maintained by Facebook and a community of developers.

• React can be used with other libraries and frameworks like Redux.

Program to add two numbers in sequence

• Declare two integer variables to store the numbers

• Take input from user for both variables

• Add the two variables and store the result in a third variable

• Print the result

A chemical reaction is a process that involves the rearrangement of the molecular structure of substances to form new substances.

• Chemical reactions involve the breaking and forming of chemical bonds.

• They can be classified into different types such as synthesis, decomposition, single displacement, double displacement, and combustion reactions.

• Examples include the reaction between hydrogen and oxygen to form water, and the rusting of iron when exposed to oxygen and moisture.

Functional currency is the currency of the primary economic environment in which the entity operates, while foreign currency is any currency other than the functional currency.

• Functional currency is used for financial reporting and measuring financial performance.

• Foreign currency is used when conducting transactions in a currency other than the functional currency.

• Functional currency is determined based on the primary economic environment of the entity.

• Foreign currency exchan...read more

My strengths include strong analytical skills and attention to detail. My weaknesses include public speaking and time management.

• Strengths: Strong analytical skills

• Strengths: Attention to detail

• Weaknesses: Public speaking

• Weaknesses: Time management

Replication is the process of duplicating or copying something.

• Replication is commonly used in biology to describe the process of copying DNA.

• In painting, replication can refer to creating multiple copies of the same artwork.

• Understanding replication is important for ensuring consistency and quality in painting projects.

Clinical trial is a research study that tests the safety and effectiveness of new medical treatments or interventions.

• Clinical trials involve human participants who volunteer to receive the treatment or intervention being tested.

• They are conducted in phases, with each phase designed to answer specific questions about the treatment's safety and effectiveness.

• Clinical trials are necessary to determine whether a new treatment is safe and effective before it can be approved for u...read more

A microscope is a scientific instrument used to magnify and view small objects that are not visible to the naked eye.

• Microscopes use lenses to magnify the image of an object, allowing for detailed examination.

• There are different types of microscopes such as optical microscopes, electron microscopes, and scanning probe microscopes.

• Microscopes are commonly used in scientific research, medical diagnosis, and various industries for quality control.

• Examples of objects viewed under...read more

LM selection criteria include experience, qualifications, skills, and knowledge.

• Experience in pharmacovigilance

• Relevant qualifications in life sciences or pharmacy

• Strong analytical and communication skills

• Knowledge of regulatory requirements

• Ability to work in a team and independently

I will grow the vertical by implementing targeted marketing strategies, expanding product offerings, and building strong partnerships.

• Developing and executing targeted marketing campaigns to reach new customers

• Expanding product offerings to meet the evolving needs of the market

• Building strategic partnerships with key industry players to increase market share

Copyrights are legal protections for original works of authorship, giving the creator exclusive rights to use and distribute their work.

• Copyrights protect original works of authorship

• They give the creator exclusive rights to use and distribute their work

• Examples include books, music, software, and artwork

Antibiotics are medications used to treat bacterial infections by killing or inhibiting the growth of bacteria.

• Antibiotics are not effective against viral infections, such as the common cold or flu.

• They work by targeting specific bacterial processes or structures, such as cell wall synthesis or protein production.

• Examples of antibiotics include penicillin, amoxicillin, and ciprofloxacin.

Assumptions of linear regression include linearity, independence, homoscedasticity, and normality.

• Linearity: The relationship between the independent and dependent variables is linear.

• Independence: The residuals are independent of each other.

• Homoscedasticity: The variance of the residuals is constant across all levels of the independent variables.

• Normality: The residuals are normally distributed.

IP stands for Internet Protocol, a set of rules governing the format of data sent over the internet.

• IP addresses are unique numerical identifiers assigned to devices connected to a network.

• There are two versions of IP - IPv4 and IPv6.

• IP packets contain information such as source and destination addresses.

• IP routing is the process of forwarding data packets from one network to another.

• IPsec is a protocol suite for securing IP communications.

Handoff is the transfer of responsibility from one person or team to another. Types include verbal, written, and electronic handoffs.

• Verbal handoff involves direct communication between individuals, such as in-person or over the phone.

• Written handoff includes documentation like notes or reports that are passed on to the next person or team.

• Electronic handoff utilizes technology like emails or messaging systems to transfer information seamlessly.

• Examples: Shift change handoff ...read more

Knurling is a process of creating a pattern of ridges or grooves on a surface for improved grip or aesthetics.

• Knurling is commonly used on tools, handles, and knobs to provide a better grip.

• It involves pressing a pattern of ridges or grooves onto a surface using a knurling tool.

• Knurling can be done on various materials such as metal, plastic, or wood.

• The pattern created by knurling can be diamond-shaped, straight, or diagonal.

• Knurling is often used in engineering and manufact...read more

Directives are instructions given to the compiler to perform specific tasks.

• Directives are used in programming languages like C, C++, and Java.

• They are used to provide instructions to the compiler.

• Examples of directives include #include, #define, and #ifdef.

Manufacturing process involves transforming raw materials into finished products through a series of steps.

• Manufacturing process starts with the procurement of raw materials.

• Raw materials are then processed or transformed into intermediate products.

• Intermediate products are further processed and assembled to create the final product.

• Quality control measures are implemented throughout the process to ensure product standards are met.

• Examples of manufacturing processes include m...read more

Casting process is a manufacturing technique used to shape molten metal into a desired form by pouring it into a mold.

• Casting process involves melting a metal and pouring it into a mold.

• The molten metal solidifies inside the mold and takes its shape.

• Different types of casting processes include sand casting, investment casting, and die casting.

• Casting is commonly used in the manufacturing of automotive parts, jewelry, and sculptures.

JVM is the Java Virtual Machine that executes Java bytecode. JRE is the Java Runtime Environment that includes JVM and libraries. JDK is the Java Development Kit that includes JRE and development tools.

• JVM stands for Java Virtual Machine and is responsible for running Java bytecode.

• JRE stands for Java Runtime Environment and includes JVM along with libraries and other components needed to run Java applications.

• JDK stands for Java Development Kit and includes JRE along with de...read more