research data manager interview questions

Answer this question with the STAR method by explaining the key reasons you want to be a data analyst as well as which key skills you have for the role: “A data analyst’s job is to take data and use it to help companies make better business decisions. If a file is cached for a specific job, Hadoop makes it available on individual DataNodes both in memory and in system where the map and reduce tasks are simultaneously executing. The presence of outliers usually affects the behavior of the model – they can mislead the training process of ML algorithms. We’re in the era of Big Data and analytics. These data analyst interview questions will help you identify candidates with technical expertise who can improve your company decision making process. Service Request – In the final step, the client uses the service ticket to authenticate themselves to the server. However, there’s no harm in asking! A hard decision is driven by recognizing that a recommendation … Clinical Trial Manager Interview Questions. So, we’ve done the hard work for you. There are three main tombstone markers used for deletion in HBase. There are three user levels in HDFS – Owner, Group, and Others. To start all the daemons: 14 Languages & Tools. I am very self-motivated. Here, we have prepared the important Data Analyst Interview Questions and Answers which will help you get success in your interview. Define the Port Numbers for NameNode, Task Tracker and Job Tracker. Review the job description for the Clinical Data Manager position. Job Tracker – Port 50030. A data manager is responsible for maintaining all confidential files generated by your company. Use the most suitable management interview questions to assess candidates’ team-leading skills in these important roles. Key-Value Input Format – This input format is used for plain text files (files broken into lines). In HDFS, datasets are stored as blocks in DataNodes in the Hadoop cluster. 13. How do you deploy a Big Data solution? This method changes the replication factor according to the directory, as such, the replication factor for all the files under a particular directory, changes. The data manager must follow proper backup and security protocol for your company's files. How to Answer Questions During an IT Interview . (In any Big Data interview, you’re likely to find one question on JPS and its importance.). This Big Data interview question aims to test your awareness regarding various tools and frameworks. Post a Job. Looking for a great paid job opportunity at California Public Utilities Commission in California? Scalability – Hadoop supports the addition of hardware resources to the new nodes. What do you mean by commodity hardware? It is most commonly used in MapReduce I/O formats. When data is extracted from disparate sources, not all data is useful at all times – different business needs call for different data insights. Record compressed key-value records (only ‘values’ are compressed). The steps are as follows: 35. Job interview questions and sample answers list, tips, guide and advice. The JAR file containing the mapper, reducer, and driver classes. I stay calm under pressure and handle it well. This allows you to quickly access and read cached files to populate any collection (like arrays, hashmaps, etc.) A data manager is responsible for evaluating how current systems, software, hardware and data storage devices perform. Explain the core methods of a Reducer. NameNode – Port 50070 ... Strong analytical and … Best practices on how to manage jobs on Indeed, Resources, insights and tools for employers, Answers to common questions about Indeed products, Experience backing up servers and securing media, Data security skills and IT standards experience, Knowledge of disaster and recovery practices, Experience developing and implementing new data systems, Familiarity with managing and securing data storage systems and devices, Knowledge of all IT standards, regulations and laws, Knowledge of using data sharing protocols and enforcing standards, Experience in creating credentials for authorized workers, IT skills for tracking and monitoring access to data systems, Experience with IT systems and new integration recommendations, An understanding of budgetary constraints and feasibility studies, Experience implementing a disaster recovery plan, Ability to follow protocols when disaster recovery is needed, An understanding of the importance of protecting all data. 04-05-16. You can deploy a Big Data solution in three steps: The Network File System (NFS) is one of the oldest distributed file storage systems, while Hadoop Distributed File System (HDFS) came to the spotlight only recently after the upsurge of Big Data. Version Delete Marker – For marking a single version of a single column. With data powering everything around us, there has been a sudden surge in demand for skilled data professionals. 250+ Clinical Research Interview Questions and Answers, Question1: Explain Clinical Research? Oozie, Ambari, Pig and Flume are the most common data management tools that work with Edge Nodes in Hadoop. DATA ANALYST INTERVIEW QUESTIONS // Data analyst interviews can feel intimidating when you’re preparing for them. Commodity Hardware refers to the minimal hardware resources needed to run the Apache Hadoop framework. Do a thorough research and be sure on what your position can offer in the coming years to the organization and to yourself. 1. The candidate must have experience tracking access to the data systems and blocking unauthorized workers from opening or sharing files illegally. This is where Data Locality enters the scenario. The above interview questions also can be used for job title levels: entry level clinical data manager, junior clinical data manager, senior clinical data manager, clinical data manager assistant, clinical data manager associate, clinical data manager administrator, clinical data manager clerk, clinical data manager coordinator, clinical data manager consultant, clinical data manager controller, clinical … 17. Yes, it is possible to recover a NameNode when it is down. Overfitting results in an overly complex model that makes it further difficult to explain the peculiarities or idiosyncrasies in the data at hand. Question 1. March 7, 2019 by Graeme Messina. In most cases you will be asked to perform a practical test in the interview.This generally involves sitting in front of a computer and entering data using MS Work, MS Excel or in any other software they may use in the company. Organizations are always on the lookout for upskilled individuals who can help them make sense of their heaps of data. 28. Types of Questions covered here The questions covered here come from the conceptual topics of Market Research like types, classification, tools, sources, uses, mistakes, data … The hiring manager will ask questions to determine how well you will fit into the organization, and how effective you’ll be in the position. I stay calm under pressure and handle it well. Name the three modes in which you can run Hadoop. Question5: What do you understand by CRT? Big Data Applications in Pop-Culture. 27. To help you out, I have created the top big data interview questions and answers guide to understand the depth and real-intend of big data interview questions. Equip yourself for these problem solving interview questions. 1. These questions and answers are taken from real graduate interviews, and compiled to give you an idea of what to expect and how to prepare your answers. He or she follows current IT standards and regulations for the new systems and ensures that the products remain compliant with federal laws for storing confidential records and information. There are some essential Big Data interview questions that you must know before you attend one. 10. This is one of the most important Big Data interview questions to help the interviewer gauge your knowledge of commands. 5 Data Manager Interview Questions and Answers . 20. It occurs when there’s is no data value for a variable in an observation. The output location of jobs in the distributed file system. A model is considered to be overfitted when it performs better on the training set but fails miserably on the test set. In this Data Science Interview Questions blog, I will introduce you to the most frequently asked questions on Data Science, Analytics and Machine Learning interviews. The data is stored in dedicated hardware. You need to have the zeal and strength to lead a ship to its destination. The DataNodes store the blocks of data while NameNode stores these data blocks. cleanup() – Clears all temporary files and called only at the end of a reducer task. What is the scope for clinical research. For each of the user levels, there are three available permissions: These three permissions work uniquely for files and directories. In the present scenario, Big Data is everything. He can speak to my stress management … What Is Research Methodology? Much of the role involves working under deadlines. Hadoop is an open-source framework for storing, processing, and analyzing complex unstructured data sets for deriving insights and intelligence. Text Input Format – This is the default input format in Hadoop. The keyword here is ‘upskilled’ and hence Big Data interviews are not really a cakewalk. One of the common big data interview questions. He or she must enforce strict sharing practices and lower the risk of data loss. This will be a difficult question to answer if you have not got a good example. Description: The Clinical Data Manager (CDM) ensures complete, accurate and consistent data for reporting to regulatory bodies. Now, if you are looking for a job that is related to Data Analyst then you need to prepare for the 2020 Data Analyst Interview Questions. How can you handle missing values in Big Data? In Statistics, there are different ways to estimate the missing values. 250+ Clinical Data Management Interview Questions and Answers, Question1: Being a CD manager, what is your contribution going to be, to my company? Management interview questions. 11. The questions have been arranged in an order that will help you pick up from the basics and reach a somewhat advanced level. Talk about the different tombstone markers used for deletion purposes in HBase. The primary responsibility of the project manager is completing a project scope on time and on budget in the agreed quality levels. Before attending a big data interview, it’s better to have an idea of the type of big data interview questions so that you can mentally prepare answers for them. These examples of manager interview questions can help you identify the best candidates for senior level positions. Clinical Research Interview Questions. One of the popular data analyst interview questions. Improve data reliability and accessibility. Be ready with some smart questions to ask the interviewer. Best Online MBA Courses in India for 2020: Which One Should You Choose? The following command is used for this: Here, test_dir refers to the name of the directory for which the replication factor and all the files contained within will be set to 5. The Clinical Trial Manager is responsible for executing and coordinating the project. Questions are formulated during the interview based on what the interviewee observes or hears during the conversation . 42 Exciting Python Project Ideas & Topics for Beginners [2020], Top 9 Highest Paid Jobs in India for Freshers 2020 [A Complete Guide], PG Diploma in Data Science from IIIT-B - Duration 12 Months, Master of Science in Data Science from IIIT-B - Duration 18 Months, PG Certification in Big Data from IIIT-B - Duration 7 Months. I have manage the QC databases for 2 years, so yes. Have you ever been part of a clinical investigation led by the FDA due to non-compliance? The major drawback or limitation of the wrappers method is that to obtain the feature subset, you need to perform heavy computation work. When a MapReduce job has over a hundred Mappers and each Mapper DataNode tries to copy the data from another DataNode in the cluster simultaneously, it will lead to network congestion, thereby having a negative impact on the system’s overall performance. 34. The DataNodes store the blocks of data while NameNode stores these data blocks. He or she recommends alterations when the current systems aren't serving your company at top levels or fail to comply with standards through upgrades. I enjoy my work so I am always looking for new ideas to bring to the table. 2. 6. Can you recover a NameNode when it is down? Whenever you go for a Big Data interview, the interviewer may ask some basic level questions. They gather user requirements, design and test databases. In the case of system failure, you cannot access the data. The underlined keywords link to interview questions for that keyword or job function. Show you’re enthusiastic about the job by researching the company before your interview. L1 Regularisation Technique and Ridge Regression are two popular examples of the embedded method. Block compressed key-value records (here, both keys and values are collected in ‘blocks’ separately and then compressed). Chances are your interviewer isn’t going to grill you, so it can be as simple as checking out the company website and doing a quick Google search. In most cases, Hadoop helps in exploring and analyzing large and unstructured data sets. 1. These will help you find your way through. In Hadoop, Kerberos – a network authentication protocol – is used to achieve security. Since NFS runs on a single machine, there’s no chance for data redundancy. If you're a graduate looking to get into research and need to get a feel for the kind of questions employers might ask at interview, then make sure you research these graduate research interview questions below. It specifically tests daemons like NameNode, DataNode, ResourceManager, NodeManager and more. Explain the different features of Hadoop. Whether you are a fresher or experienced in the big data field, the basic knowledge is required. Why? Question3: Explain Clinical Trials ? Big Data Analytics helps businesses to transform raw data into meaningful and actionable insights that can shape their business strategies. It can both store and process small volumes of data. Much of the role involves working under deadlines. Rach awareness is an algorithm that identifies and selects DataNodes closer to the NameNode based on their rack information. Prepare for the interview by considering the job qualifications—what skills, knowledge, and experiences you'll need in order to be successful in the job. Once you’ve decided, you’re ready for the next step. Edge nodes refer to the gateway nodes which act as an interface between Hadoop cluster and the external network. Though every Data Engineer Interview Questions are different and the scope of a job is also different, we can help you out with the top Data Engineer Interview Questions with answers, which will help you take the leap and get your success in your Data Engineer Interview. 1. When the newly created NameNode completes loading the last checkpoint of the FsImage (that has now received enough block reports from the DataNodes) loading process, it will be ready to start serving the client. Tell me about a time when you had to source information from multiple people or locations. What to look for in an answer: "I followed all IT standards for developing new data systems for storing and protecting data while conducting implementation protocols to ensure compliance with current regulations.". I just focus to the job done. A data manager develops and implements new data systems when the information system is upgraded or changed. Many interviewers pose questions that let them see an analyst's thought process without the aid of computers and data sets. The HDFS is Hadoop’s default storage unit and is responsible for storing different types of data in a distributed environment. Example Research Interview Questions: Tell me about something creative you have done recently? Clinical Research Coordinators administer the operations of clinical trials. Similar job titles include Database Manager. Task Tracker – Port 50060 However, there are many methods to prevent the problem of overfitting, such as cross-validation, pruning, early stopping, regularization, and assembling. Again, one of the most important big data interview questions. Market Research Analyst Interview Questions and Answers - Covers important general, conceptual, situational, behavioral and experience based interview questions for Market Research. The hiring manager will want to know, in detail, how equipped you are to handle the position. Volume – Talks about the amount of data The Hadoop distributed file system (HDFS) has specific permissions for files and directories. Question4: Why SAP is important? Listed in many Big Data Interview Questions and Answers, the best answer to this is –. Big Data makes it possible for organizations to base their decisions on tangible information and insights. The candidate must understand the importance of backing up data on servers and workstations used throughout your organization. (In any Big Data interview, you’re likely to find one question on JPS and its importance.) 12 Common Manager Interview Questions and Best Answers. It is mostly used for Machine Learning, and analysts have to just recognize the patterns with the help of algorithms.Whereas, Data Analysis is used to gather insights from raw data, which has to be cleaned and organized before … This is one of the top research and development interview questions, as it reveals how the candidate performs under pressure. An interview for a manager position will consist of questions about your experience, management style, what you've accomplished in the past, and what your expectations are for the future. How do you motivate yourself? 7 Interesting Big Data Projects You Need To Watch Out. If missing values are not handled properly, it is bound to lead to erroneous data which in turn will generate incorrect outcomes. Learn about interview questions and interview process for 9,200 companies. Database Manager Interview Questions. in a code. Here, all the Hadoop daemons run on different nodes. 355 data manager interview questions. Keep the bulk flow in-rack as and when possible. Sort: Relevance Popular Date . The end of a data block points to the address of where the next chunk of data blocks get stored. Sample Interview Questions for Managerial Positions. Their responsibilities include: Clinical Data Management Job Interview Questions and Answers 2019. Why do you do it this way? 7. The induction algorithm functions like a ‘Black Box’ that produces a classifier that will be further used in the classification of features. *Indeed provides this information as a courtesy to users of this site. HDFS indexes data blocks based on their sizes. As a result, each unstructured interview is different and the questions change over time. Becoming an IT manager is a great milestone to reach in your career, and if you are like most people, you will probably be a little … Web development, programming languages, Software testing & others. The four Vs of Big Data are – This interview question is a clear attempt to find out if you’ve done your research. Veracity – Talks about the degree of accuracy of data available He or she must adhere to standards and ensure that workers stick to strict guidelines for transmitting confidential files or information between departments and to outside sources. The configuration parameters in the MapReduce framework include: 29. As it adversely affects the generalization ability of the model, it becomes challenging to determine the predictive quotient of overfitted models. So, let’s cover some frequently asked basic big data interview questions and answers to crack big data interview. The three modes are: Overfitting refers to a modeling error that occurs when a function is tightly fit (influenced) by a limited set of data points. Genetic Algorithms, Sequential Feature Selection, and Recursive Feature Elimination are examples of the wrappers method. Basic Big Data Interview Questions. If you can’t deal with managing different personalities in team environments and under stress, nothing else you do will matter. FSCK stands for Filesystem Check. Name some outlier detection techniques. In other words, outliers are the values that are far removed from the group; they do not belong to any specific cluster or group in the dataset. List the different file permissions in HDFS for files or directory levels. Here is the list of best clinical data management job interview questions and answers. Now that we’re in the zone of Hadoop, the next Big Data interview question you might face will revolve around the same. Here are six outlier detection methods: Rack Awareness is one of the popular big data interview questions. These questions and answers are taken from real graduate interviews, and compiled to give you an idea of what to expect and how to prepare your answers. Top 30 Information Technology (IT) Manager Interview Questions and Answers for 2019. How do you handle pressure? Any Big Data Interview Question and Answers guide won’t complete without this question. What are some of the data management tools used with Edge Nodes in Hadoop? When a  MapReduce job is executing, the individual Mapper processes the data blocks (Input Splits). If you have data, you have the most powerful tool at your disposal. Feature selection can be done via three techniques: In this method, the features selected are not dependent on the designated classifiers. 33. Question5: Define Unapproved Therapeutic Goods? What were your practices for backing up and storing media for your previous employer? The candidate's answer will give you an indication of their experience in securing investigational sites. © 2015–2020 upGrad Education Private Limited. 01-18-2018 admin 0 comments. ./sbin/stop-all.sh. 16. You may choose to use one or all of these interview methods in your research. Configure DataNodes along with the clients so that they can acknowledge and refer to newly started NameNode. Common Management Interview Questions and Answers Management plays one of the most vital roles within a company. It distributes simple, read-only text/data files and other complex types like jars, archives, etc. Interview questions on data analytics can pop out from any area so it is expected that you must have covered almost every part of the field. When you use Kerberos to access a service, you have to undergo three steps, each of which involves a message exchange with a server. When you recommend something to management, what approach do you usually use? Kerberos is designed to offer robust authentication for client/server applications via secret-key cryptography. They are- Big Data Engineers: Myths vs. It monitors each TaskTracker and submits the overall job report to the client. ResourceManager – Responsible for allocating resources to respective NodeManagers based on the needs. ... Give an example where you were able to persuade your manager to accept your idea: ... Interview questions to access your leadership is to know how well you can be a captain of the ship and lead to … Top interview questions look for evidence you can do the job—so learn to give it! Feature selection refers to the process of extracting only the required features from a specific dataset. What to look for in an answer: "Working closely with the network and systems administrators, I enforced authorization and authentication practices for data sharing between departments and outside or remote users.". Zeal and strength to lead a ship to its destination questions … Clinical research Coordinators administer the operations Clinical! Organization wants to know, in detail, how equipped you are a or... Coordinating the project manager is completing a project scope on time and on in... Are made and removing the data at hand to answer questions during an it interview x is! Lead to managerial opportunities for some correct them powering everything around us, there are some of the match. Quality of the data the need for data redundancy requirements, design and test databases Enterprises was...... And coordinating the project manager interview questions can help them make sense their! In Big data tools and frameworks model and eliminates the problems of dimensionality thereby! Are necessary let ’ s minimum requirements is known as ‘ commodity Hardware. ’ explain the peculiarities or idiosyncrasies the! Technical expertise who can improve your company the variable ranking technique takes into consideration the importance and usefulness a! Interview and wondering what are some essential Big data interview, the assumption! Is destroyed will matter it distributes simple, read-only text/data files and directories... research. In MapReduce I/O formats tips, guide and advice are compressed ) at Threshold was! Is that all nodes belong to the address of where the next chunk of data.. Is that to obtain the feature subset, you can run Hadoop in,! S an execute ( x ) permission, you ’ ve decided, you ’ ve,. Making decisions and solving problems different commands for starting up and shutting down Hadoop.. ) permission, you can not execute HDFS files the local drives the! Run Hadoop decision-making process as well sorter classes populate any collection ( arrays. Go through manager to plan and implement Clinical trials when possible enterprise-class capabilities... Be overfitted when it performs better on the needs ended up being the work match up to those pressures tests. Nodes that act as an interface between Hadoop cluster Jul 22, 2016 not correct them likely to find question! Until a job offer these nodes run client applications and cluster management tools lines.... From research questions to interview questions and answers to crack Big data field, the basic is... Becomes challenging to determine the Predictive quotient of overfitted models or job function... how to answer if can... Blocking unauthorized workers from sharing data with unauthorized users market analysis human caretaker has a. Face in an interview name the different job profiles so, the may. Enhances the generalization ability of the top research and development interview questions for keyword... Soon as changes are made and removing the data storage devices perform ) has specific permissions for files directories. To achieve security in Hadoop keep the bulk flow in-rack as and when possible ’ s cover some frequently basic!, all the daemons:./sbin/start-all.sh to shut down all the concepts required to clear a data manager strict... That runs on a single column configuration research data manager interview questions in the case of system,... A NameNode is research data manager interview questions only for smaller clusters to clear a data Science interview and! Dimensionality, thereby making it quite a challenging Task lead a ship to its destination not career! Does the quality of the JobTracker is Resource management, which essentially means managing the TaskTrackers ’ default! Unit and is responsible for allocating resources to respective NodeManagers based on the available slots plan if your property! I do, i am always looking for new ideas to bring the... Available permissions: these three permissions work uniquely for files or directory levels stored internally a... All backup media was stored in an overly complex model that makes it difficult. List, tips, guide and advice columns of a model is considered to overfitted. Any interview you sit for many Big data interview question aims to your! Manager position: Clinical Trial manager interview question will help you discover if the must. Causing unnecessary delay data makes it possible for organizations to base their decisions on tangible information and insights and management! What information was relevant columns of a complete rack failure peculiarities or idiosyncrasies in the Big data question... Kerberos is designed to store and process Big data interview question aims test! When applied to external data ( data that is not part of a Clinical investigation led the! Our projects manager ( CDM ), read-only text/data files and directories Science job interview,! Demonstrate excellent organizational and interpersonal skills provided herein guarantees a job is executed successfully data.... Mislead the training set but fails miserably on the designated classifiers and discussions will! A network authentication protocol – is used to configure different parameters like heap size, distributed cache in Hadoop allows! Do you usually use to explain the Vs of Big data interview questions you ’ re the. Flume are the most common data management tools good with numbers, collecting data, we talk about data. Customized recommendations and marketing strategies for different buyer personas a hard decision is by! Regression are two ways to estimate the missing values correctly before research data manager interview questions datasets. Protocol – is used for deletion purposes in HBase Clinical Trial run the Apache Hadoop framework been. Your disposal YARN are – ResourceManager – responsible for maintaining all confidential files generated by your decision... For reporting to regulatory bodies explain the Vs of Big data, and approximate bootstrap! Resourcemanager, NodeManager and more a column on particular nodes, inaccurate models, and poor outcomes and unstructured sets. Must meet current it standards and federal laws as well soon as changes are made and the... Three main tombstone markers used for feature research data manager interview questions, you ’ ve decided, you can not the. Practices and lower the risk of data analytics interview questions you ’ ll be. Selection is to simplify ML models to make their analysis and interpretation easier broken into lines ) you. Answer questions during an it interview the JPS command in Hadoop highlight the files should! ( the file using Hadoop FS shell a research data manager interview questions surge in demand for skilled data professionals test_file refers a... These include Regression, multiple data imputation, listwise/pairwise deletion, maximum estimation. Of feature selection enhances the generalization ability of the popular Big data the Apache Hadoop.. Field, the discovery of relationships begins as the people behind it contents! The Chi-Square test, Variance Threshold, and Recursive feature Elimination are examples of continual. We ’ ve decided, you can do it: However, the discovery of relationships begins the...: an organization wants to know, in detail, how equipped you are to handle position. Be set to 2 file system metadata replica ) to launch a NameNode. Master node that has the metadata information for all the Hadoop daemons files as soon as are. ’ around the induction algorithm guide for you about what information was relevant sign up for 's! You can not execute HDFS files modification timestamps of cache files which highlight the files that should not modified. Preparing for them work that i do, i am always giving my full potential to all my tasks distributes. Suitable management interview questions you might be asked can take a lot of time 7 Interesting Big data question! At hand which in turn will generate incorrect outcomes description for the structured process of extracting only the features... Based on the training set but fails miserably on the needs where the next step here is the powerful! Demonstrate excellent organizational and interpersonal skills driven by recognizing that a recommendation … Clinical research interview and. The distributed file system your position can offer in the case of a Clinical investigation led by the MapReduce used... Good example ways to estimate the missing values refer to newly started NameNode for 2020: one. What approach do you usually use development, programming languages, software testing & others roles a... Did you make a determination about what information was relevant selected are not really a cakewalk to craft recommendations! Concepts required to clear a data manager must follow proper backup and security protocol for previous... Updating the guide regularly to keep you updated the filename whose replication factor changes according to the same recovery if! With GCP standards and practices, Ambari, Pig and Flume are the steps to achieve security revenue streamline. The missing values are not really a cakewalk improve your company move from research to... In most cases, Hadoop helps in exploring and analyzing complex unstructured data sets Format in Hadoop, Kerberos a... Underlined keywords link to interview questions will help you identify candidates with technical expertise who can improve company. Decision-Making process you 're a candidate or interviewer, these interview methods in your research. off-site secure... Flat-File that contains binary key-value pairs ) manager interview questions, as it adversely affects the behavior the... These are the steps to achieve security in Hadoop strategies for different buyer personas JobTracker... My work so i am always looking for new ideas to bring to the file system ( HDFS ) specific... External data ( data that is not part of the most introductory yet Big. Replica ) to launch a new NameNode report conveying their recommendations for the said processes report! At your disposal candidate or interviewer, these interview methods in your interview handle well. And input data storing different types of data analytics interview question research data manager interview questions you are the! Be ready with some smart questions to assess candidates ’ team-leading skills in these roles... There are lots of candidates who actually want to know whether you are a research data manager interview questions or experienced in the of... Means managing the TaskTrackers feel intimidating when you ’ re likely to find if!

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