About SmartData Enterprises
Company Description
SmartData Enterprises is a leading technology solutions provider dedicated to delivering innovative software and data analytics services. Founded on the principles of integrity, collaboration, and customer-centricity, SmartData Enterprises prides itself on fostering an environment where creativity and innovation thrive. Our work culture promotes teamwork, continuous learning, and professional development, ensuring that employees are empowered to reach their full potential. We embrace diversity and inclusion, recognizing that varied perspectives drive better solutions. At SmartData, employees enjoy a flexible work environment that prioritizes work-life balance while encouraging productivity and engagement.
Software Developer Interview Questions
Q1: Can you describe your experience with programming languages and technologies relevant to this role?
I have extensive experience in Java, Python, and JavaScript, having worked on various projects where I utilized frameworks such as Spring and Django. Additionally, I am well-versed in front-end technologies like React and Angular, which I used to develop responsive web applications.
Q2: How do you approach debugging and troubleshooting code issues?
I begin by replicating the issue to understand its context. I then use debugging tools and logs to trace the problem. I also consult documentation and code comments if available, and I collaborate with peers for additional insights. Once identified, I implement a fix and ensure thorough testing to prevent recurrence.
Q3: Can you discuss a challenging project you worked on and how you approached it?
In my previous role, I was tasked with optimizing an existing application that was slow and unresponsive. I conducted a performance analysis, identified bottlenecks, and refactored the code to improve efficiency. I also implemented caching strategies which significantly enhanced the application's speed.
Q4: How do you stay updated with the latest technology trends and programming languages?
I subscribe to technology blogs, attend webinars and conferences, and participate in online coding communities. Additionally, I take courses on platforms like Udemy and Coursera to continually enhance my skills and knowledge.
Q5: What is your experience with version control systems?
I have used Git extensively for version control, collaborating with teams on projects. I am familiar with branching strategies, pull requests, and resolving merge conflicts, which has helped maintain a clean codebase and streamline collaboration.
Data Analyst Interview Questions
Q1: What tools and software are you proficient in for data analysis?
I am proficient in Excel, SQL, and data visualization tools such as Tableau and Power BI. I also have experience using Python libraries like Pandas and NumPy for data manipulation and analysis.
Q2: Can you explain your process for handling large datasets?
I typically start by cleaning and preprocessing the data to remove any inconsistencies. I then explore the dataset to understand its structure and relationships. After that, I use statistical methods to analyze the data and derive insights, ensuring that my findings are backed by solid evidence.
Q3: Describe a time when you used data to drive decision-making.
In my previous position, I analyzed customer feedback data to identify trends in product satisfaction. By presenting these insights to the management team, I was able to recommend changes that led to a 15% increase in customer satisfaction scores.
Q4: How do you ensure the accuracy and integrity of your data analysis?
I implement checks at each stage of my data processing workflow. This includes verifying data sources, performing validation tests, and cross-referencing results with other datasets. I also document my methodology to ensure transparency and reproducibility.
Q5: What experience do you have in presenting data findings to non-technical stakeholders?
I have experience creating clear and concise presentations that highlight key insights and actionable recommendations. I focus on visual storytelling, using graphs and charts to convey complex data in an understandable manner, which has helped facilitate informed decision-making.
Project Manager Interview Questions
Q1: What project management methodologies are you familiar with?
I am experienced in Agile, Scrum, and Waterfall methodologies. I adapt my approach based on the project's requirements and the team's dynamics, ensuring that we meet deadlines while remaining flexible to any changes.
Q2: How do you prioritize tasks and manage resources in a project?
I prioritize tasks based on their impact and urgency, using tools like the Eisenhower Matrix. I also communicate with team members to understand their workloads and adjust resource allocation accordingly to ensure that we meet project milestones.
Q3: Describe a challenging project you managed and how you navigated through obstacles.
I managed a project with a tight deadline and limited resources. By implementing daily stand-ups and fostering open communication, I was able to identify issues early. I also reallocated resources strategically and negotiated deadlines with stakeholders, ultimately delivering the project successfully.
Q4: How do you handle conflicts within a project team?
I address conflicts by facilitating open dialogue between the parties involved, encouraging them to express their viewpoints. I strive to mediate the discussion to find a common ground and ensure that the team remains focused on project goals.
Q5: What tools do you use to track project progress and performance?
I use project management software such as Jira and Asana to track tasks, timelines, and deliverables. Additionally, I utilize dashboards and Gantt charts for visual representation of project status and progress, which helps keep the team aligned and accountable.
Marketing Specialist Interview Questions
Q1: What marketing strategies have you successfully implemented in your previous roles?
I have successfully implemented digital marketing campaigns including SEO, content marketing, and social media advertising. One campaign improved website traffic by 40% and increased lead generation through targeted ads.
Q2: How do you measure the effectiveness of a marketing campaign?
I use key performance indicators (KPIs) such as conversion rates, click-through rates, and return on investment (ROI) to assess campaign performance. I also analyze customer feedback and engagement metrics to refine future campaigns.
Q3: Can you provide an example of how you handled a marketing challenge?
In my last position, we faced declining engagement on social media. I conducted a thorough analysis of our content strategy, identified areas for improvement, and revamped our approach. This led to a 25% increase in engagement over three months.
Q4: What tools and software do you use for marketing analytics?
I am proficient in Google Analytics, HubSpot, and social media analytics platforms. These tools help me track marketing performance, understand audience behavior, and make data-driven decisions.
Q5: How do you stay updated with the latest marketing trends and technologies?
I regularly read industry blogs, attend marketing webinars, and participate in networking events. I also engage in online courses to expand my knowledge of emerging tools and strategies in the marketing field.
Company Background and Industry Position
SmartData Enterprises has steadily carved its niche as a dynamic player in the data solutions space, specializing in analytics, cloud integration, and AI-driven insights. Founded just over a decade ago, the company has expanded aggressively, riding the wave of digital transformation that many industries have embraced. Today, it stands out not just for its cutting-edge technologies but also for a corporate culture that champions innovation and continuous learning.
In a crowded market where data firms range from scrappy startups to tech giants, SmartData balances agility with a robust portfolio of enterprise clients. This positioning affects how the company approaches talent acquisition—and, by extension, how candidates experience its hiring process. Their focus on quality delivery means recruitment isn’t just about filling seats; it’s about identifying people who can adapt, contribute, and grow alongside evolving tech landscapes.
How the Hiring Process Works
- Application and Resume Screening – The journey starts online, with candidates submitting resumes tailored to specific job roles. SmartData's ATS (Applicant Tracking System) filters applications based on eligibility criteria embedded in the job description. This early gate ensures that only those with a minimum skill threshold and relevant experience move forward.
- Initial HR Interview – Successful candidates are contacted for a preliminary chat, typically over the phone or video call. This stage assesses cultural fit, communication skills, and motivation, not just eligibility. Recruiters seek to understand if candidates’ career aspirations align with SmartData’s values and long-term goals.
- Technical Evaluation – Depending on the role, candidates face technical assessments—either online coding tests for software positions or case studies for data analysts. This step weeds out those lacking foundational knowledge, ensuring that technical interviews are meaningful and focused.
- Technical Interview Rounds – These deeper dives are conducted by team leads or senior engineers. They probe problem-solving capabilities, domain expertise, and hands-on experience. For roles involving machine learning or cloud architecture, expect scenario-based questions and real-time coding or data manipulation tasks.
- Managerial or Panel Interview – This stage reviews behavioral traits and leadership potential. It’s common for candidates to meet cross-functional managers, which helps gauge collaborative aptitude and strategic thinking beyond technical fluency.
- Offer and Negotiation – After a comprehensive evaluation, SmartData extends an offer. Negotiations around salary range and benefits are handled transparently, reflecting industry benchmarks and candidate expectations.
Interview Stages Explained
Initial HR Screening
This isn’t just a formality. Recruiters at SmartData are trained to spot red flags early—like misaligned expectations or poor communication—which can save both parties time. They dive into your background, probing gently about career shifts or gaps to understand your story, not just your resume.
Technical Assessments
These assessments are finely tuned to the specific job roles. For software engineers, expect algorithmic challenges that test not just coding ability but optimization and scalability thinking. Data roles might encounter SQL queries, data cleaning tasks, or analytical problems that mirror real client projects. It's about more than rote answers; it's your approach, clarity of thought, and adaptability that count.
Technical Interviews
Often the most intense part, candidates report these rounds as a “deep dive” into their skillset. Interviewers aren’t just ticking boxes; they’re looking for storytelling around past projects, technical trade-offs you considered, and your learning from challenges. For example, a cloud architect may be asked to design a scalable pipeline on the spot, testing practical know-how under pressure.
Managerial and Cultural Fit Interviews
This is where character shines. SmartData values people who are proactive, team-oriented, and eager to contribute beyond their immediate tasks. Be ready for situational questions that reveal your conflict resolution style or leadership approach. It’s less about right answers and more about demonstrating emotional intelligence and growth mindset.
Examples of Questions Candidates Report
- Technical Interview (Software Role): “How would you optimize a database query that’s running slowly on a large dataset?”
- Data Analyst Role: “Given a dataset of customer transactions, how would you identify potential fraud cases?”
- HR Interview: “Tell me about a time you faced a disagreement with a team member. How did you handle it?”
- Managerial Round: “If a project deadline is at risk due to unforeseen technical issues, how do you communicate this to stakeholders?”
- Case Study: “Design a machine learning pipeline for predictive maintenance on industrial machines.”
Eligibility Expectations
SmartData’s eligibility criteria are quite aligned with industry norms yet tailored to the company’s growth strategy. For entry-level roles, a bachelor’s degree in a relevant field like Computer Science, Statistics, or Engineering is typically required. However, they show flexibility for candidates who demonstrate strong practical skills or alternative certifications, especially in coding bootcamps or data science micro-credentials.
Experience demands vary drastically. Junior roles might require 0-2 years, while senior or specialist positions expect substantial domain expertise, often 5+ years. Additionally, certain positions ask for proficiency in specific tools—like AWS for cloud roles or Python and R for analytics. Certifications aren’t mandatory but certainly boost a candidate’s chances.
Common Job Roles and Departments
SmartData Enterprises employs a broad spectrum of professionals. While software development and data science form the core, there’s a strong presence of cloud engineers, AI researchers, business analysts, and project managers. Here’s a snapshot of key departments:
- Software Engineering: Front-end, back-end, full-stack developers focused on building scalable platforms.
- Data Science and Analytics: Roles ranging from data analysts interpreting trends to machine learning engineers crafting predictive models.
- Cloud Infrastructure: Specialists managing AWS, Azure, or Google Cloud environments for client solutions.
- Product Management: Professionals bridging technical teams and business goals, ensuring deliverables match client needs.
- Quality Assurance: Test engineers focused on automation and manual testing to uphold software integrity.
Compensation and Salary Perspective
| Role | Estimated Salary (Annual, USD) |
|---|---|
| Junior Software Engineer | $65,000 – $85,000 |
| Senior Data Scientist | $110,000 – $140,000 |
| Cloud Solutions Architect | $125,000 – $160,000 |
| Product Manager | $95,000 – $130,000 |
| QA Engineer | $60,000 – $80,000 |
These figures are competitive within the mid-tier tech market but may slightly trail mega tech giants, reflecting SmartData’s current size and budget. However, many employees report a good balance between salary and benefits, including flexible working hours, training allowances, and stock options in some cases.
Interview Difficulty Analysis
SmartData’s interview rounds have gained a reputation for being tough but fair. Candidates often feel the technical stages are challenging, especially for roles requiring niche expertise such as cloud architecture or AI modeling. Yet, they appreciate that interviews test real-world skills rather than tricky puzzles.
Compared to other mid-sized tech firms, SmartData’s process leans toward a comprehensive evaluation of technical depth and problem-solving. It’s not a quick hire setup; expect multiple rounds that assess different facets of your profile. The HR and managerial interviews, by contrast, tend to be more conversational and less daunting.
Preparation Strategy That Works
- Understand the Job Role Thoroughly: Go beyond the job description. Research the technologies and frameworks SmartData uses in that department. This helps tailor your preparation to relevant skills.
- Brush Up on Fundamentals: Many candidates stumble because they overlook basics in data structures, algorithms, or core analytics principles. Revisiting these fundamentals is crucial.
- Practice Realistic Scenarios: Try mock interviews or case studies that mirror SmartData’s problems. For example, practice designing scalable cloud systems or analyzing large datasets.
- Sharpen Communication: Both in technical and HR rounds, clear explanation of your thought process matters. Practice articulating your project experiences and problem-solving approach.
- Stay Updated on Industry Trends: Showing awareness of emerging technologies and market shifts can impress interviewers, particularly in managerial rounds.
Work Environment and Culture Insights
From what insiders share, SmartData thrives on a culture that values innovation without the rigidity of bigger corporations. Teams tend to be collaborative, with an open-door policy that encourages knowledge sharing. There’s a notable emphasis on learning — employees often mention internal workshops and sponsored certifications.
That said, the pace can be brisk, reflective of a company eager to maintain its competitive edge. Flexibility in work hours is a plus, but project deadlines sometimes demand occasional extra effort. Overall, the environment suits those who enjoy a mix of challenge and support in a tech-forward setting.
Career Growth and Learning Opportunities
One of SmartData’s strong suits is its commitment to employee development. Unlike some firms where career paths feel siloed, SmartData often encourages cross-functional movement and continuous skill enhancement. Many report receiving mentorship from senior leaders and access to cutting-edge resources.
Growth isn’t just vertical; lateral moves into emerging domains like AI ethics or advanced analytics are supported. This approach aligns with the company’s evolving business model, which means you’re likely to develop skills highly relevant in the broader tech market.
Real Candidate Experience Patterns
Candidates often remark on the thoroughness of the process. Initially, some find the multiple rounds daunting, but most appreciate the transparency at each step. Feedback, when given, tends to be constructive, which is refreshing compared to generic rejection emails seen elsewhere.
Interestingly, the HR interview can sometimes be the make-or-break stage. It’s not just about ticking a box but truly gauging alignment with company culture. Candidates who've prepared stories highlighting teamwork and adaptability tend to fare better here.
Technical rounds, though challenging, often feel rewarding because interviewers actively engage candidates in problem-solving rather than just testing memorized answers.
Comparison With Other Employers
| Aspect | SmartData Enterprises | Big Tech Firms | Startups |
|---|---|---|---|
| Interview Complexity | Moderate to High | Very High (often competitive & lengthy) | Variable (sometimes less formal) |
| Candidate Experience | Structured and Transparent | Highly Competitive, Less Feedback | Personalized but Less Predictable |
| Salary Range | Mid-Market Competitive | Top-Tier | Often Lower but Equity Incentives |
| Career Growth | Strong Emphasis on Learning | High Visibility, Fast Promotion | Flexible but Risky |
| Work Environment | Collaborative, Fast-Paced | Demanding, High Pressure | Dynamic, Less Structured |
Expert Advice for Applicants
Don’t underestimate the power of storytelling in your interviews at SmartData. Technical expertise is essential, but equally vital is demonstrating how you tackle real problems and collaborate with others. Prepare examples from your previous roles that highlight not only your skills but also your mindset.
Keep your preparation targeted. Randomly solving problems won’t help as much as practicing challenges related to your prospective role. For instance, a cloud engineer should invest time in deploying and troubleshooting actual cloud services rather than just algorithm questions.
Also, be authentic. SmartData’s recruiters are skilled at reading beyond rehearsed answers. Admit what you don’t know but show how you plan to fill gaps—this kind of honesty can set you apart.
Frequently Asked Questions
How many recruitment rounds can I expect at SmartData?
Typically, there are between four to six rounds depending on the role complexity, ranging from HR screening to technical interviews and managerial assessments.
Are there any coding platforms SmartData uses for technical tests?
Yes, they commonly utilize platforms like HackerRank or Codility for initial coding assessments, particularly for software roles.
What is the average timeline from application to offer?
On average, it takes about 3 to 6 weeks, but this can vary based on the position and candidate responsiveness.
Does SmartData consider candidates without formal degrees?
While a degree is preferred, they do consider candidates with strong portfolios, certifications, or relevant experience, especially in technical roles.
Is remote work an option during the hiring process or post joining?
SmartData offers hybrid work models and has adapted to remote interviews fully, but specific policies depend on team and role requirements.
Final Perspective
Interviewing at SmartData Enterprises is less about waltzing through a routine checklist and more about demonstrating thoughtful expertise combined with a cultural fit. The process is intensive, reflecting their commitment to building teams that not only meet technical demands but also contribute to the company’s innovative spirit.
For job seekers, this means preparation should be strategic and sincere—know your stuff, but also be ready to connect on a human level. SmartData, with its balanced blend of ambition and support, offers a compelling destination for those eager to grow in a fast-evolving tech environment.
SmartData Enterprises Interview Questions and Answers
Updated 21 Feb 2026Technical Support Specialist Interview Experience
Candidate: Emily Zhang
Experience Level: Entry-level
Applied Via: Job fair
Difficulty: Easy
Final Result: Rejected
Interview Process
2
Questions Asked
- How do you handle difficult customers?
- Explain a time you solved a technical problem under pressure.
- What do you know about our products?
- Describe your communication style.
Advice
Improve your product knowledge and practice situational responses for customer support scenarios.
Full Experience
The first round was a group interview assessing communication and teamwork. The second round was a one-on-one with the manager focusing on customer service skills and technical knowledge.
Quality Assurance Engineer Interview Experience
Candidate: David Kim
Experience Level: Mid-level
Applied Via: Recruiter outreach
Difficulty:
Final Result:
Interview Process
3
Questions Asked
- What is the difference between black-box and white-box testing?
- Write test cases for a login feature.
- How do you prioritize bugs?
- Describe your experience with automated testing tools.
Advice
Be ready to demonstrate your testing knowledge and problem-solving skills with practical examples.
Full Experience
The first round was a phone interview with HR and technical questions. The second round involved a live coding test to write test cases. The final round was a panel interview discussing testing strategies and tools.
Project Manager Interview Experience
Candidate: Clara Martinez
Experience Level: Senior
Applied Via: Company website
Difficulty: Hard
Final Result:
Interview Process
4
Questions Asked
- Describe your approach to managing cross-functional teams.
- How do you handle project scope changes?
- Give an example of a project that failed and what you learned.
- Explain risk management strategies you have used.
Advice
Prepare detailed examples from your past experience and demonstrate leadership skills.
Full Experience
The process started with a phone interview, followed by a technical round focusing on project management methodologies. Then a behavioral interview with senior management, and finally a case study presentation.
Data Analyst Interview Experience
Candidate: Brian Lee
Experience Level: Entry-level
Applied Via: Employee referral
Difficulty: Easy
Final Result: Rejected
Interview Process
2
Questions Asked
- How do you handle missing data in a dataset?
- Explain the difference between supervised and unsupervised learning.
- Describe a project where you used data visualization.
Advice
Gain more hands-on experience with data tools and practice explaining your projects clearly.
Full Experience
The first round was a HR screening to check cultural fit and motivation. The second round was a technical interview with questions on data concepts and some practical exercises using Excel and SQL.
Software Engineer Interview Experience
Candidate: Alice Johnson
Experience Level: Mid-level
Applied Via: Online job portal
Difficulty:
Final Result:
Interview Process
3
Questions Asked
- Explain the difference between REST and SOAP APIs.
- Write a function to reverse a linked list.
- Describe a challenging bug you fixed in a previous project.
Advice
Brush up on data structures and be ready to discuss past projects in detail.
Full Experience
The first round was a phone screening focusing on my resume and basic programming concepts. The second round was a technical interview with coding exercises. The final round involved a team interview where I discussed system design and problem-solving approaches.
Frequently Asked Questions in SmartData Enterprises
Have a question about the hiring process, company policies, or work environment? Ask the community or browse existing questions here.
Common Interview Questions in SmartData Enterprises
Q: In a sports contest there were m medals awarded on n successive days (n > 1). 1. On the first day 1 medal and 1/7 of the remaining m - 1 medals were awarded. 2. On the second day 2 medals and 1/7 of the now remaining medals was awarded; and so on.On the nth and last day, the remaining n medals were awarded.How many days did the contest last, and how many medals were awarded altogether?
Q: A man has a wolf, a goat, and a cabbage. He must cross a river with the two animals and the cabbage. There is a small rowing-boat, in which he can take only one thing with him at a time. If, however, the wolf and the goat are left alone, the wolf will eat the goat. If the goat and the cabbage are left alone, the goat will eat the cabbage. How can the man get across the river with the two animals and the cabbage?
Q: A hare and a tortoise have a race along a circle of 100 yards diameter. The tortoise goes in one directionand the hare in the other. The hare starts after the tortoise has covered 1/5 of its distance and that too leisurely.The hare and tortoise meet when the hare has covered only 1/8 of the distance. By what factor should the hareincrease its speed so as to tie the race?
Q: 9 cards are there. You have to arrange them in a 3*3 matrix. Cards are of 4 colors. They are red, yellow, blue and green. Conditions for arrangement: one red card must be in first row or second row. 2 green cards should be in 3rd column. Yellow cards must be in the 3 corners only. Two blue cards must be in the 2nd row. At least one green card in each row.
Q: A rich man died. In his will, he has divided his gold coins among his 5 sons, 5 daughters and a manager. According to his will: First give one coin to manager. 1/5th of the remaining to the elder son.Now give one coin to the manager and 1/5th of the remaining to second son and so on..... After giving coins to 5th son, divided the remaining coins among five daughters equally.All should get full coins. Find the minimum number of coins he has?
Q: Consider a pile of Diamonds on a table. A thief enters and steals 1/2 of the total quantity and then again 2 extra from the remaining. After some time a second thief enters and steals 1/2 of the remaining+2. Then 3rd thief enters and steals 1/2 of the remaining+2. Then 4th thief enters and steals 1/2 of the remaining+2. When the 5th one enters he finds 1 diamond on the table. Find out the total no. of diamonds originally on the table before the 1st thief entered.
Q: T, U, V are 3 friends digging groups in fields. If T & U can complete i groove in 4 days &, U & V can complete 1 groove in 3 days & V & T can complete in 2 days. Find how many days each takes to complete 1 groove individually.
Q: The citizens of planet nigiet are 8 fingered and have thus developed their decimal system in base 8. A certain street in nigiet contains 1000 (in base 8) buildings numbered 1 to 1000. How many 3s are used in numbering these buildings?
Q: ABCDE are sisters. Each of them gives 4 gifts and each receives 4 gifts No two sisters give the same combination ( e.g. if A gives 4 gifts to B then no other sisters can give four to other one.)Â (i) B gives four to A.(ii) C gives 3 to E. How much did A,B,C,E give to D?
Q: The egg vendor calls on his first customer and sells half his eggs and half an egg. To the second customer, he sells half of what he had left and half an egg and to the third customer he sells half of what he had then left and half an egg. By the way he did not break any eggs. In the end three eggs were remaining . How many total eggs he was having ?
Q: A long, long time ago, two Egyptian camel drivers were fighting for the hand of the daughter of the sheik of Abbudzjabbu. The sheik, who liked neither of these men to become the future husband of his daughter, came up with a clever plan: a race would dete
Q: Jarius and Kylar are playing the game. If Jarius wins, then he wins twice as many games as Kylar. If Jarius loses, then Kylar wins as the same number of games that Jarius wins. How many do Jarius and Kylar play before this match?
Q: In a Park, N persons stand on the circumference of a circle at distinct points. Each possible pair of persons, not standing next to each other, sings a two-minute song ? one pair immediately after the other. If the total time taken for singing is 28 minutes, what is N?
Q: Give two dice - one is a standard dice, the other is blank (nothing painted on any of the faces). The problem is to paint the blank dice in such a manner so that when you roll both of them together, the sum of both the faces should lie between 1 and 12. Numbers from 1-12 (both inclusive) equally likely.
Q: If I walk with 30 miles/hr i reach 1 hour before and if i walk with 20 miles/hr i reach 1 hour late. Find the distance between 2 points and the exact time of reaching destination is 11 am then find the speed with which it walks.
Q: There are four dogs/ants/people at four corners of a square of unit distance. At the same instant all of them start running with unit speed towards the person on their clockwise direction and will always run towards that target. How long does it take for them to meet and where?
Q: In a country where everyone wants a boy, each family continues having babies till they have a boy. After some time, what is the proportion of boys to girls in the country? (Assuming probability of having a boy or a girl is the same)
Q: An escalator is descending at constant speed. A walks down and takes 50 steps to reach the bottom. B runs down and takes 90 steps in the same time as A takes 10 steps. How many steps are visible when the escalator is not operating.Â
Q: A family X went for a vacation. Unfortunately it rained for 13 days when they were there. But whenever it rained in the mornings, they had clear afternoons and vice versa. In all they enjoyed 11 mornings and 12 afternoons. How many days did they stay there totally?
Q: A person meets a train at a railway station coming daily at a particular time. One day he is late by 25 minutes, and he meets the train 5 k.m. before the station. If his speed is 12 kmph, what is the speed of the train.