Bid data and hadoop mcqs

Bid data and hadoop mcqs Question 1: Point out the correct statement: (A) Applications can use the Reporter to report progress (B) The HadoopMapReduce framework spawns one map task for each InputSplit generated by the ...

Bid data and hadoop mcqs Question 1: Point out the correct statement: (A) Applications can use the Reporter to report progress (B) The HadoopMapReduce framework spawns one map task for each InputSplit generated by the InputFormat for the job (C) The intermediate, sorted outputs are always stored in a simple (key-len, key, value-len, value) format (D) All of the above Question 2: Input to the _______ is the sorted output of the mappers. (A) Reducer (B) Mapper (C) Shuffle (D) All of the above Question 3: The right number of reduces seems to be __________ . (A) 0.65 (B) 0.55 (C) 0.95 (D) 0.68 Question 4: The output of the _______ is not sorted in the Mapreduce framework for Hadoop. (A) Mapper (B) Cascader(C) Scalding (D) None of the above Question 5: Which of the following phases occur simultaneously ? (A) Reduce and Sort (B) Shuffle and Sort (C) Shuffle and Map (D) All of the above Question 6: Mapper and Reducer implementations can use the ________ to report progress or just indicate that they are alive. (A) Partitioner (B) OutputCollector (C) Reporter (D) All of the above Question 7: __________ is a generalization of the facility provided by the MapReduce framework to collect data output by the Mapper or the Reducer. (A) Partitioner (B) OutputCollector (C) Reporter (D) All of the above Question 8: _________ is the primary interface for a user to describe a MapReduce job to the Hadoop framework for execution. (A) Map Parameters (B) JobConf(C) MemoryConf (D) All of the above Question 9: A ________ serves as the master and there is only one NameNode per cluster. (A) Data Node (B) NameNode (C) Data block (D) Replication Question 10: HDFS works in a __________ fashion. (A) master-worker (B) master-slave (C) worker/slave (D) All of the above Question 11: ________ NameNode is used when the Primary NameNode goes down. (A) Rack (B) Data (C) Secondary (D) None Question 12: Which of the following scenario may not be a good fit for HDFS? (A) HDFS is not suitable for scenarios requiring multiple/simultaneous writes to the same file (B) HDFS is suitable for storing data related to applications requiring low latency data access(C) HDFS is suitable for storing data related to applications requiring high latency data access (D) None of the above Question 13: The need for data replication can arise in various scenarios like __________ . (A) Replication Factor is changed (B) DataNode goes down (C) Data Blocks get corrupted (D) All of the above View Answer Question 14: ________ is the slave/worker node and holds the user data in the form of Data Blocks. (A) DataNode (B) NameNode (C) Data block (D) Replication View Answer Question 15: HDFS provides a command line interface called __________ used to interact with HDFS. (A) HDFS Shell (B) FS Shell (C) DFSA Shell (D) NoneQuestion 16: HDFS is implemented in _____________ programming language. (A) C++ (B) Java (C) Scala (D) None Question 17: ___________ is the world’s most complete, tested, and popular distribution of Apache Hadoop and related projects. (A) MDH (B) CDH (C) ADH (D) BDH Question 18: Cloudera ___________ includes CDH and an annual subscription license (per node) to Cloudera Manager and technical support. (A) Enterprise (B) Express (C) Standard (D) None the above Question 19: Cloudera Express includes CDH and a version of Cloudera ___________ lacking enterprise features such as rolling upgrades and backup/disaster recovery. (A) Enterprise (B) Express (C) Standard(D) Manager Question 20: Cloudera Enterprise comes in ___________ edition . (A) One (B) Two (C) Three (D) Four Question 21: __________ is a online NoSQL developed by Cloudera. (A) HCatalog (B) Hbase (C) Imphala (D) Oozie Question 22: _______ is an open source set of libraries, tools, examples, and documentation engineered. (A) Kite (B) Kize (C) Ookie (D) All of the above Question 23: To configure short-circuit local reads, you will need to enable ____________ on local Hadoop. (A) librayhadoop (B) libhadoop (C) libhad(D) hadoop Question 24: CDH process and control sensitive data and facilitate _____________ . (A) multi-tenancy (B) flexibilty (C) scalabilty (D) resuability Question 25: _______ can change the maximum number of cells of a column family. (A) set (B) reset (C) alter (D) connect Question 26: Which of the following is not a table scope operator ? (A) MEMSTORE_FLUSH (B) MEMSTORE_FLUSHSIZE (C) MAX_FILESIZE (D) None of the mentioned Question 27: You can delete a column family from a table using the method _________ of HBAseAdmin class. (A) delColumn() (B) removeColumn() (C) deleteColumn()(D) None of the mentioned Question 28: __________ class adds HBase configuration files to its object. (A) Configuration (B) Collector (C) Component (D) None of the above Question 29: The ________ class provides the getValue() method to read the values from its instance. (A) Get (B) Result (C) Put (D) Value Question 30: ________ communicate with the client and handle data-related operations. (A) Master Server (B) Region Server (C) Htable (D) All of the above Question 31: ________ is the main configuration file of HBase. (A) hbase.xml (B) hbase-site.xml (C) hbase-site-conf.xml(D) None of the above Question 32: HBase uses the _______ File System to store its data. (A) Hive (B) Impala (C) Hadoop (D) Scala Question 33: Which of the following is a principle of analytic graphics? (A) Don’t plot more than two variables at at time (B) Make judicious use of color in your scatterplots (C) Show box plots (univariate summaries) (D) Show causality, mechanism, explanation Question 34: Which of the following is true about the base plotting system? (A) Margins and spacings are adjusted automatically depending on the type of plot and the data (B) Plots are typically created with a single function call (C) Plots are created and annotated with separate functions (D) The system is most useful for conditioning plots Question 35: Which of the following is an example of a valid graphics device in R? (A) A socket connection (B) A Microsoft Word document (C) A PDF file(D) A file folder Question 36: Which of the following is an example of a vector graphics device in R? (A) JPEG (B) GIF (C) PNG (D) SVG Question 37: Bitmapped file formats can be most useful for _____________ . (A) Plots that may need to be resized (B) Plots that require animation or interactivity (C) Plots that are not scaled to a specific resolution (D) Scatterplots with many many points Question 38: Which of the following functions is typically used to add elements to a plot in the base graphics system? (A) lines() (B) hist() (C) plot() (D) boxplot() Question 39: Which of the following is a base package for R language ? (A) util (B) lang (C) tools(D) all the above Question 40: Advanced users can write ___ code to manipulate R objects directly. (A) C (B) C++ (C) Java (D) None Question 41: InfoSphere DataStage has __________ levels of Parallelism. (A) 1 (B) 2 (C) 3 (D) 4 Question 42: ___________ is used for processing complex transactions and messages. (A) PS (B) Server Edition (C) MVS Edition (D) TX Question 43: DataStage originated at __________, a company that developed two notable products: UniVerse database and the DataStage ETL tool. (A) VMark (B) Vzen (C) Hatez (D) SMarkQuestion 44: DataStage RTI is real time integration pack for _________. (A) STD (B) ISD (C) EXD (D) FSD Question 45: The IBM _____________ Platform provides all the foundational building blocks of trusted information, including data integration, data warehousing, master data management, big data and information governance. (A) InfoStream (B) InfoSphere (C) InfoSurface (D) InfoSurface Question 46: __________ is a standard Java API for monitoring and managing applications. (A) JVM (B) JVN (C) JMX (D) JMY Question 47: For YARN, the ___________ Manager UI provides host and port information. (A) Data Node (B) NameNode (C) Resource (D) ReplicationQuestion 48: . Collection of objects currently stored in R is called as ___________ . (A) package (B) workspace (C) list (D) array