Best Bigdata Hadoop Developer Interview Guide For Everyone Prepared by Top Industry Experts

The market for ‘BigData’ is experiencing a tremendous growth, thereby creating a huge demand for skilled and trained BigData professionals across the globe. Though the demand is massive, the supply certainly seems to be falling short of the demand. The core reason might be the lack of proper homework before attending the interviews.

To make things smoother for you during the interview preparation process, we have listed top 50 commonly asked questions along with the best suited answers, which can help you to successfully crack the BigDataHadoop interview.

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Note: All the questions and answers are prepared by the subject experts who are associated with Kovid Academy.

1. What is Big-Data?

The term ‘Big-data’ is used to represent a collection of large and complex datasets, which are difficult to capture, store, process, share, analyze, and visualize using the traditional RDBMS tools.

2. Explain the five V’s of Big Data?

Big-Data is often described using the five V’s, which are:

Volume – the amounts of data generated every day, i.e. in Petabytes and Exabytes.

Velocity – the speed at which the data is generated every second. After the advent of social media, it probably takes seconds for any news to get viral across the Internet.

Variety – the different types of datagenerated every day that comes in a variety of formats like texts, audios, videos, csv, etc.

Veracity – the uncertainties or the messiness of thedata. With different forms of bigdata, it gets difficult to control the accuracy and quality. The volume often makes up the core reason behind the lack of accuracy and quality of thedata.

Value – having access to bigdata is always a good thing, but failing to extract the real value from it is completely useless. Extracting value means, drawing benefits to the organizations; achieving the return on investment (ROI); and making profits for the businesses working on big data.

3. On what concept the Hadoop framework works?

The Hadoop Framework works on:

Hadoop Distributed File System: HDFS is a Java-based storage unit in Hadoop, which offers reliable and scalable storage of large datasets. It is responsible for storing different types ofdata in the form of blocks.

Hadoop MapReduce: MapReduce is a Java-based programming paradigm that offers scalability across different Hadoop clusters. It is responsible for distributing the workload into different tasks to run in parallel. The job of ‘Map’ is to split the datasets into tuples or key-value pairs, and the ‘Reduce’ then takes the output from Map and combines it with datatuples into a smaller set of tuples.

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Note: Reduce jobs are performed only after the execution of Map jobs.

Articulate Storyline Tips: Custom Interactive Conversations

Articulate Storyline is a versatile eLearning authoring tool that allows instructional designers to create engaging and interactive eLearning content. One of the most powerful features of Storyline is its ability to create custom conversational interactions with a rich interface. These interactions can simulate real-life conversations, enhance learner engagement, and improve retention by providing a more immersive learning experience. This article will guide you through the process of creating custom conversational interactions using Articulate Storyline.

Understanding Conversational Interactions
Conversational interactions in eLearning are dialogues or exchanges that mimic real-life conversations between learners and virtual characters. These interactions can be used for various purposes, such as:

Role-playing scenarios: Allowing learners to practice communication skills in a safe environment.
Customer service training: Simulating interactions with customers to improve service skills.
Decision-making exercises: Providing scenarios where learners must choose responses and see the outcomes of their decisions.
Benefits of Using Conversational Interactions
Increased Engagement: Interactive dialogues capture learners’ attention and keep them engaged.
Enhanced Retention: Simulated conversations help learners retain information better by providing practical applications of knowledge.
Improved Skills: Role-playing and decision-making exercises enhance learners’ communication and critical thinking skills.
Realistic Practice: Learners can practice real-world scenarios without the risk of real-world consequences.
Steps to Create Custom Conversational Interactions in Articulate Storyline
Plan Your Interaction

Before you start building your interaction in Storyline, it’s important to plan it out:

Define the Objectives: What do you want learners to achieve through the interaction?
Outline the Script: Draft the dialogue, including all possible learner responses and feedback.
Design the Flow: Create a flowchart to map out the different paths the conversation could take based on learner choices.
Set Up Your Storyline Project

Create a New Project: Open Articulate Storyline and create a new project.
Add Scenes and Slides: Organize your project by adding scenes and slides. Each scene can represent a different part of the conversation, and each slide can represent a dialogue exchange.
Design the Interface

Add Characters: Use Storyline’s character library or import custom characters to represent the virtual interlocutors.
Insert Backgrounds: Set the scene by adding relevant backgrounds. This could be a virtual office, a customer service desk, or any setting relevant to your scenario.
Add Text Boxes: Place text boxes on the slides for dialogue and learner responses.

Create Interactive Elements

Buttons for Responses: Add buttons for each possible learner response. These buttons will allow learners to choose their reply.
Triggers for Navigation: Use triggers to link buttons to different slides based on the learner’s choices. This will create a branching scenario where each choice leads to a different outcome.
Variables for Tracking: Use variables to track learner choices and provide customized feedback. For example, you can create a variable to count correct responses or to store the selected responses for later feedback.
Add Audio and Visual Feedback

Record Voiceovers: Add voiceovers to make the interaction more realistic. You can record your own voice or hire professional voice actors.
Insert Animations: Use animations to bring characters to life. For example, you can animate a character to smile or frown based on the learner’s response.
Provide Feedback: Add visual and audio feedback for each response to guide learners and reinforce learning points.
Test and Refine

Preview the Interaction: Use the preview function to test your interaction and ensure that all triggers and variables work as intended.
Gather Feedback: Share the interaction with colleagues or a test group to gather feedback.
Refine and Improve: Make necessary adjustments based on feedback to improve the interaction.
Best Practices for Creating Conversational Interactions
Keep It Realistic: Ensure that the dialogues are natural and realistic. Avoid overly complex language or scenarios that learners might not encounter in real life.
Provide Clear Instructions: Clearly explain how the interaction works and what learners are expected to do.
Use Branching Wisely: While branching scenarios are powerful, they can become complex. Keep the branching manageable to avoid overwhelming the learner.
Incorporate Feedback: Provide immediate feedback for each learner response to guide them and reinforce learning.
Monitor and Update: Regularly review and update the interactions to ensure they remain relevant and effective.

Online MBA Myth & Facts Demystifying Online MBA Programs: Separating Fact from Fiction

Introduction
Embarking on the journey of pursuing an online MBA can be a pivotal decision, unlocking a world of career possibilities in the ever-evolving job market. However, the decision-making process is often clouded by misconceptions and conflicting opinions. In this blog post, we aim to dispel common myths surrounding online MBA programs, providing clarity to empower you in making an informed choice.

Myth 1: Online MBA programs are not as challenging as on-campus programs.

Contrary to popular belief, online MBA programs offer a level of rigor comparable to traditional on-campus counterparts. Reputable business schools provide both online and offline programs concurrently, ensuring consistency in curriculum, faculty, and study materials. Online students face similar challenges and learning opportunities, debunking the misconception that online programs are less demanding.

Myth 2: To pursue an online MBA, you must be technologically proficient.

There exists a misconception that only tech-savvy individuals can excel in online learning. The reality is that anyone with a basic understanding of internet usage can enroll in an online MBA course. The process is as simple as surfing the internet or using an app. For those less familiar with technology, universities often offer assistance and introductory sessions, ensuring a smooth transition into the online learning environment.

Myth 3: There isn’t any direct communication with faculty members.

A prevalent myth suggests that online MBA students lack meaningful interactions with professors and peers. In reality, online students have various avenues for communication, including doubt-solving sessions, email, and discussion forums. While the level of interaction may vary between institutions, many online programs prioritize fostering connections between students and faculty, creating a supportive learning environment.

Myth 4: Programs for online MBAs do not require the participation of a learner.

Another misconception is that online MBA programs involve minimal effort from students. On the contrary, active participation is crucial for success. Students engage in video lectures, participate in activities, adhere to project timelines, and take assessments to demonstrate their understanding of the material. Earning an MBA degree online requires dedication and effort, dispelling the notion that success can be achieved merely by enrolling.

Myth 5: Online MBA programs are not offered by reputable business schools.

Some believe that only traditional universities provide reputable MBA programs. However, prestigious institutions globally, such as Imperial College London, The University of Warwick, The University of Edinburgh, Cranfield School of Management, and Lancaster University, offer online MBA degrees. These programs adhere to the same high standards as their on-campus counterparts, providing a quality education to students worldwide.

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Conclusion

Now that we’ve debunked these common myths, it’s evident that online MBA programs are a credible and challenging avenue for those seeking advanced education. An exemplary institution in this regard is DPU-COL, a highly regarded institute in India accredited A++ by NAAC. With over 35 years of experience, DPU-COL offers online MBAs in multiple specializations, providing top-notch learning and placement opportunities to learners across the country.

In conclusion, the decision to pursue an online MBA should be based on accurate information and personal goals. With the flexibility, accessibility, and quality of education offered by reputable institutions, online MBA programs stand as a viable and valuable option for ambitious individuals aiming to advance their careers in today’s competitive job market.