Trending questions in Apache Spark

0 votes
5 answers

How to change the spark Session configuration in Pyspark?

You aren't actually overwriting anything with this ...READ MORE

Dec 14, 2020 in Apache Spark by Gitika
 • 65,910 points • 122,160 views
0 votes
3 answers

Filtering a row in Spark DataFrame based on matching values from a list

Use the function as following: var notFollowingList=List(9.8,7,6,3,1) df.filter(col("uid").isin(notFollowingList:_*)) You can ...READ MORE

Jun 6, 2018 in Apache Spark by Shubham
 • 13,490 points • 91,961 views
+2 votes
14 answers

How to create new column with function in Spark Dataframe?

val coder: (Int => String) = v ...READ MORE

Apr 5, 2019 in Apache Spark by anonymous
edited Apr 5, 2019 by Omkar • 87,528 views
+1 vote
6 answers

groupByKey vs reduceByKey in Apache Spark.

ReduceByKey is the best for production. READ MORE

Mar 3, 2019 in Apache Spark by anonymous
 • 75,750 views
+1 vote
8 answers

How to replace null values in Spark DataFrame?

Hi, In Spark, fill() function of DataFrameNaFunctions class is used to replace ...READ MORE

Dec 15, 2020 in Apache Spark by MD
 • 95,440 points • 74,179 views
+1 vote
8 answers

How to print the contents of RDD in Apache Spark?

Save it to a text file: line.saveAsTextFile("alicia.txt") Print contains ...READ MORE

Dec 10, 2018 in Apache Spark by Akshay
 • 60,746 views
+5 votes
11 answers

Concatenate columns in apache spark dataframe

its late but this how you can ...READ MORE

Mar 21, 2019 in Apache Spark by anonymous
 • 71,296 views
+1 vote
2 answers

Spark: Dataframe vs Dataset

Recently, there are two new data abstractions ...READ MORE

Jul 29, 2019 in Apache Spark by Jackie
 • 45,144 views
+1 vote
3 answers

map() vs flatMap() in Spark

Spark map function expresses a one-to-one transformation. ...READ MORE

Jun 17, 2019 in Apache Spark by vishal
 • 180 points • 38,080 views
+1 vote
1 answer

Is there any efficient way of dealing null values during concat functionality of pyspark.sql version 2.3.4?

When you concatenate any string with a ...READ MORE

Nov 6, 2019 in Apache Spark by Rishi
 • 38,111 views
0 votes
1 answer

org.apache.spark.sql.AnalysisException: cannot resolve given input columns

The string Productivity has to be enclosed between single ...READ MORE

Jul 10, 2019 in Apache Spark by Tina
 • 42,047 views
+2 votes
2 answers

py4j.protocol.Py4JError: org.apache.spark.api.python.PythonUtils.getEncryptionEnabled does not exist in the JVM

Using findspark is expected to solve the ...READ MORE

Jun 21, 2020 in Apache Spark by suvasish
 • 21,255 views
0 votes
1 answer

Error: No module named 'findspark'

Hi@akhtar, To import this module in your program, ...READ MORE

May 6, 2020 in Apache Spark by MD
 • 95,440 points • 19,773 views
+2 votes
4 answers

use length function in substring in spark

You can use the function expr val data ...READ MORE

May 3, 2018 in Apache Spark by kurt_cobain
 • 9,390 points • 41,912 views
+1 vote
3 answers

What is the difference between rdd and dataframes in Apache Spark ?

Comparison between Spark RDD vs DataFrame 1. Release ...READ MORE

Aug 28, 2018 in Apache Spark by shams
 • 3,670 points • 42,377 views
0 votes
1 answer

ImportError: No module named 'pyspark'

Hi@akhtar, By default pyspark in not present in ...READ MORE

May 6, 2020 in Apache Spark by MD
 • 95,440 points • 14,953 views
0 votes
1 answer

1)Given sfpd RDD, to create a pair RDD consisting of tuples of the form (Category. 1) in scala ,which of the following is used?

Hi, @Ritu, When creating a pair RDD from ...READ MORE

Nov 23, 2020 in Apache Spark by Gitika
 • 65,910 points • 5,611 views
0 votes
0 answers

The number of stages in a job is equal to the number of RDDs in DAG. however, under one of the cgiven conditions, the scheduler can truncate the lineage. identify it. [closed]

14)The number of stages in a job ...READ MORE

Nov 25, 2020 in Apache Spark by Edureka
 • 200 points
closed Nov 25, 2020 by MD • 4,823 views
+1 vote
1 answer

Reading a text file through spark data frame

Try this: val df = sc.textFile("HDFS://nameservice1/user/edureka_168049/Structure_IT/samplefile.txt") df.collect() val df = ...READ MORE

Jul 24, 2019 in Apache Spark by Suri
 • 25,765 views
+1 vote
1 answer

is not a Parquet file. expected magic number at tail [80, 65, 82, 49] but found [51, 53, 10, 10]

Hi@akhtar, Here you are trying to read a ...READ MORE

Feb 3, 2020 in Apache Spark by MD
 • 95,440 points • 17,292 views
0 votes
1 answer

A Dataframe can be created from an existing RDD. You would create the Dataframe from the existing RDD by inferring schema using case classes in which one of the given classes?

Hi@ritu, You can create a data frame from ...READ MORE

Nov 25, 2020 in Apache Spark by akhtar
 • 38,230 points • 3,990 views
0 votes
2 answers

5)Using which one of the given choices will you create an RDD with specific partitioning?

Hi, @Ritu, option b for you, as Hash Partitioning ...READ MORE

Nov 23, 2020 in Apache Spark by Gitika
 • 65,910 points • 3,625 views
0 votes
1 answer

The number of stages in a job is equal to the number of RDDs in DAG. however, under one of the cgiven conditions, the scheduler can truncate the lineage. identify it.

Hi@Edureka, Spark's internal scheduler may truncate the lineage of the RDD graph ...READ MORE

Nov 26, 2020 in Apache Spark by MD
 • 95,440 points • 3,406 views
0 votes
1 answer

What are some of the things you can monitor in the Spark Web UI?

Option c) Mapr Jobs that are submitted READ MORE

Nov 25, 2020 in Apache Spark by Gitika
 • 65,910 points • 3,221 views
0 votes
1 answer

12)Which one of the given flows correctly describe the Spark Streaming Architecture?

Hi@ritu, You need to learn the Architecture of ...READ MORE

Nov 23, 2020 in Apache Spark by MD
 • 95,440 points • 3,181 views
0 votes
1 answer

3)You have a dataset of in-game purcahses from mobile game users and you want to group these users for upsell. which one of the spark machine learning algorithms could you use ?

Hi@ritu, I think the problem can be solved ...READ MORE

Nov 23, 2020 in Apache Spark by MD
 • 95,440 points • 3,121 views
0 votes
0 answers

What allows spark to periodically persist data about an application such that it can recover from failures? [closed]

What allows spark to periodically persist data ...READ MORE

Nov 26, 2020 in Apache Spark by ritu
 • 960 points
closed Nov 26, 2020 by MD • 2,494 views
0 votes
1 answer

9)In scala, which one of the following will give the top 10 resolutions to the console, assuming that sfpdDF is the DataFrame registered as a table - sfpd?

Hey, @Ritu, According to the question, the answer ...READ MORE

Nov 23, 2020 in Apache Spark by Gitika
 • 65,910 points • 2,510 views
0 votes
1 answer

how create distance vector in pyspark (Euclidean distance)

Hi@dani, You can find the euclidean distance using ...READ MORE

Oct 16, 2020 in Apache Spark by MD
 • 95,440 points • 3,983 views
0 votes
1 answer

The number of stages in a job is equal to the number of RDDs in DAG. however, under one of the cgiven conditions, the scheduler can truncate the lineage. identify it.

Hi@ritu, Spark's internal scheduler may truncate the lineage of the RDD graph if ...READ MORE

Nov 25, 2020 in Apache Spark by akhtar
 • 38,230 points • 2,273 views
0 votes
1 answer

4)Spark streaming converts streaming data into DStreams. which one of the given statements about DStreams is True?

Hi@ritu, Spark DStream (Discretized Stream) is the basic ...READ MORE

Nov 23, 2020 in Apache Spark by MD
 • 95,440 points • 2,355 views
0 votes
1 answer

Spark Core How to fetch max n rows of an RDD function without using Rdd.max()

Hi@Prasant, If Spark Streaming is not supporting tuple, ...READ MORE

Dec 3, 2020 in Apache Spark by MD
 • 95,440 points • 1,834 views
0 votes
1 answer

6)What allows spark streaming to provide fault tolerance for network sources of data?

Hi@ritu, Fault tolerance is the property that enables ...READ MORE

Dec 1, 2020 in Apache Spark by MD
 • 95,440 points • 2,097 views
0 votes
1 answer

What will be printed when the below code is executed?

Option D)  runtime error READ MORE

Nov 26, 2020 in Apache Spark by Gitika
 • 65,910 points • 2,062 views
0 votes
1 answer

which one of the following commands is used to see the structure of the Dataframe?

Hi @Ritu If you want to see the ...READ MORE

Nov 25, 2020 in Apache Spark by Gitika
 • 65,910 points • 1,935 views
+1 vote
1 answer

How to write Spark DataFrame to Avro Data File?

Hi@akhtar, Since Avro library is external to Spark, ...READ MORE

Nov 4, 2020 in Apache Spark by MD
 • 95,440 points • 2,783 views
0 votes
0 answers

A Dataframe can be created from an existing RDD. You would create the Dataframe from the existing RDD by inferring schema using case classes in which one of the given classes? [closed]

A Dataframe can be created from an ...READ MORE

Nov 25, 2020 in Apache Spark by Edureka
 • 200 points
closed Nov 26, 2020 by MD • 1,881 views
0 votes
1 answer

What does the following code print?

error: expected class or object definition sc.parallelize (Array(1L, ...READ MORE

Nov 25, 2020 in Apache Spark by Gitika
 • 65,910 points • 1,788 views
0 votes
1 answer

How do you load this multiline data in spark as a single record?

Hi@Ruben, I think you can add an escape ...READ MORE

Nov 23, 2020 in Apache Spark by MD
 • 95,440 points • 1,829 views
0 votes
1 answer

How to read a dataframe based on an avro schema?

Hi, I am able to understand your requirement. ...READ MORE

Oct 30, 2020 in Apache Spark by MD
 • 95,440 points • 2,809 views
0 votes
1 answer

16)What allows spark to periodically persist data about an application such that it can recover from failures?

Hi@Edureka, Checkpointing is a process of truncating RDD ...READ MORE

Nov 26, 2020 in Apache Spark by MD
 • 95,440 points • 1,645 views
0 votes
1 answer

7)From Schema RDD, data can be cache by which one of the given choices?

Hi, @Ritu, According to the official documentation of Spark 1.2, ...READ MORE

Nov 23, 2020 in Apache Spark by Gitika
 • 65,910 points • 1,591 views
0 votes
0 answers

17)from the given choices, identify the value returned by $"whatever"?

17)from the given choices, identify the value ...READ MORE

Nov 25, 2020 in Apache Spark by ritu
 • 960 points • 1,268 views
0 votes
1 answer

Which one of the following commands is used to start python-spark?

Hi@ritu, To start your python spark shell, you ...READ MORE

Nov 26, 2020 in Apache Spark by MD
 • 95,440 points • 1,154 views
0 votes
1 answer

In AWS, if user wants to run spark, then on top of which one of the following can the user do it?

Hi@ritu, AWS has lots of services. For spark ...READ MORE

Nov 26, 2020 in Apache Spark by MD
 • 95,440 points • 1,151 views
0 votes
1 answer

What will be printed when the below code is executed ?

Option a) List(5,100,10) The take method returns the first n elements in an ...READ MORE

Nov 26, 2020 in Apache Spark by Gitika
 • 65,910 points • 1,099 views
0 votes
1 answer

What does the below code print?

Option d) Run time error. READ MORE

Nov 25, 2020 in Apache Spark by Gitika
 • 65,910 points • 971 views
0 votes
1 answer

From the below code. what is the most appropriate next step in ML process?

Hi@ritu, The most appropriate step according to me ...READ MORE

Nov 25, 2020 in Apache Spark by MD
 • 95,440 points • 902 views
0 votes
0 answers

What does the below code print? [closed]

What does the below code print? val AgeDs ...READ MORE

Nov 25, 2020 in Apache Spark by ritu
 • 960 points
closed Nov 25, 2020 by Gitika • 928 views
0 votes
1 answer

13)Refer the input and identify the output if the below code is run

Option c)  Run time error - A READ MORE

Nov 25, 2020 in Apache Spark by Gitika
 • 65,910 points • 826 views
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