Hadoop Assessment

January 20, 2021

Name

Phone

1. The source of HDFS architecture in Hadoop originated as which of the following?

A) Facebook distributed filesystem

B) Yahoo distributed filesystem

C) Google distributed filesystem

D) Azure distributed filesystem

2. Hadoop Framework is written in

A) Python

B) Java

C) C++

D) Scala

3. The archive file created in Hadoop always has the extension of

A) .hrh

B) .har

C) .hrc

D) .hrar

4. Apache Hadoop achieves reliability by replicating the data across multiple hosts, and hence does not require ________ storage on hosts.

A) Standard RAID levels

B) RAID

C) ZFS

D) Operating system

5.Which statement is false about Hadoop

A) It runs with commodity hard ware

B) It is a part of the Apache project sponsored by the ASF

C) It is best for live streaming of data

D) None of the above

6. Which scenario demands highest bandwidth for data transfer between nodes

A) Different nodes on the same rack

B) Nodes on different racks in the same data center.

C) Nodes in different data centers .

D) Data on the same node.

7. What is the major advantages of storing data in block size 128MB

A) It saves disk seek time

B) It saves disk processing time

C) It saves disk access time

D) It saves disk latency time

8) One can copy a file into HDFS with a different block size to that of existing block size configuration by using

A) -dfs.block.size=block_size

B) -Ddfs.blocksize=block_size

C) -Ddfs.blocksize.copy=block_size

9) What is the port number for NameNode

A) 50030

B) 50060

C) 50070

D) 50071

10) Point out the wrong statement :

a) Hardtop processing capabilities are huge and it’s real advantage lies in the ability to process terabytes & petabytes of data

b) Hadoop uses a programming model called “MapReduce”, all the programs should confirms to this model in order to work on Hadoop platform

c) The programming model, MapReduce, used by Hadoop is difficult to write and test

d) All of the mentioned

11) The __________ is responsible for allocating resources to the various running applications subject to familiar constraints of capacities, queues etc.

a) Manager

b) Master

c) Scheduler

d) None of the mentioned

12) Pig operates in mainly how many nodes ?

a) Two

b) Three

c) Four

d) Five

13) Which of the following will run pig in local mode ?

a) $ pig -x local …

b) $ pig -x tez_local …

c) $ pig …

d) None of the mentioned

14) The ____________ and the EditLog are central data structures of HDFS.

a) DsImage

b) FsImage

c) FsImages

d) All of the mentioned

15) HDFS, by default, replicates each data block _____ times on different nodes and on at least ____ racks.

a) 3,2

b) 1,2

c) 2,3

d) All of the mentioned

16) _______ is a utility which allows users to create and run jobs with any executables as the mapper and/or the reducer.

a) Hadoop Strdata

b) Hadoop Streaming

c) Hadoop Stream

d) None of the mentioned

17) _________ is the default Partitioner for partitioning key space. Please select 2 correct answers

a) HashPar

b) Partitioner

c) HashPartitioner

d) None of the mentioned

18) In order to read any file in HDFS, instance of __________ is required.

a) filesystem

b) datastream

c) outstream

d) inputstream

19) _____________ is used to read data from bytes buffers .

a) write()

b) read()

c) readwrite()

d) all of the mentioned

20) Applications can use the _________ provided to report progress or just indicate that they are alive.

a) Collector

b) Reporter

c) Dashboard

d) None of the mentioned

21) ________ is a platform for constructing data flows for extract, transform, and load (ETL) processing and analysis of large datasets.

a) Pig Latin

b) Oozie

c) Pig

d) Hive

22) The Pig Latin scripting language is not only a higher-level data flow language but also has operators similar to :

a) SQL

b) JSON

c) XML

d) All of the mentioned

23) Hadoop I/O Hadoop comes with a set of ________ for data I/O.

a) methods

b) commands

c) classes

d) none of the mentioned

24) Apache Hadoop ___________ provides a persistent data structure for binary key-value pairs.

a) GetFile

b) SequenceFile

c) Putfile

d) All of the mentioned

25) Which of the following format is more compression-aggressive ?

a) Partition Compressed

b) Record Compressed

c) Block-Compressed

d) Uncompressed

26) The _________ as just the value field append(value) and the key is a LongWritable that contains the record number, count + 1.

a) SetFile

b) ArrayFile

c) BloomMapFile

d) None of the mentioned

27) The __________ is a framework-specific entity that negotiates resources from the ResourceManager

a) NodeManager b) ResourceManager

c) ApplicationMaster

d) All of the mentioned

28) Apache Hadoop YARN stands for :

a) Yet Another Reserve Negotiator

b) Yet Another Resource Network

c) Yet Another Resource Negotiator

d) All of the mentioned

29) The CapacityScheduler supports _____________ queues to allow for more predictable sharing of cluster resources.

a) Networked

b) Hierarchical

c) Partition

d) None of the mentioned

30) Which of the following function is used to read data in PIG ?

a) WRITE

b) READ

c) LOAD

d) None of the mentioned