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    Apache Pig Interview Questions and Answers

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    Udemy

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    Medium of instructions English
    Mode of learning Self study
    Mode of Delivery Video and Text Based

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    ₹ 1,999
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    The syllabus

    Introduction

    • Introduction

    Section 2

    • Scenario Based Question (File modification based)
    • How to remove single quotes from data using Pig?
    • How to compute sum of a field in all the rows from an alias?
    • What is the difference between GROUP and COGROUP in PIG?
    • Is there a way to do this? eg, pass the name of the file to be processed, etc?
    • Is there a way to export the results from Pig directly to a database like mysql?
    • How do you deal with empty or missing input files in Apache Pig?
    • Is there any way to store out to a single CSV file?
    • How can I cast the value, without having to do a FOREACH on all the records?
    • Scenario Based Question

    Section 3

    • Scenario Based Question (Date)
    • How to optimize a group by statement in PIG latin?
    • How to handle spill memory in pig? How to fix it?
    • How to do Transpose in corresponding few columns in pig?
    • Find if a string is present inside another string in Pig?
    • Scenario Based Question (Programming)
    • Is there any way to store out to a single CSV file in Apache Pig?
    • Removing duplicates using PigLatin?
    • How to include external jar file using PIG?
    • How to reference columns in a FOREACH after a JOIN?

    Section 4

    • How to Load multiple files from a date range (part of the directory structure)?
    • What are the data types of Pig Latin?
    • What are the different ways of executing Pig script?
    • What are the components of Pig Execution Environment?
    • How Pig programming gets converted into MapReduce jobs?
    • What is the difference between logical and physical plans?
    • How can I pass a parameter with space to a pig script?
    • How can I calculate a percentage (partial aggregate / total aggregate)?
    • How do I find out where the data comes from?
    • Is there a way to check if a map is empty?

    Section 5

    • Does Pig allow grouping on expressions?
    • Is there a way for me to figure out how many rows exist in a dataset from alias?
    • Is there any difference between `==` and `eq` for numeric comparisons?
    • How do I prevent failure if some records don't have the needed number of columns
    • Does Pig support regular expressions?
    • Can I do a numerical comparison while filtering?
    • How do I make my Pig jobs run on a specified number of reducers?
    • What is the difference between Store and dump commands?
    • How to debug a pig script?
    • What is BloomMapFile used for?

    Section 6

    • What are the limitations of the Pig?
    • What is the difference between GROUP and COGROUP operators in Pig?
    • Give some list of relational operators used in Pig?
    • Can we process vast amount of data in local mode? Why?
    • Explain about the different complex data types in Pig?
    • How do I control the number of mappers?
    • How can I load data using Unicode control characters as delimiters?
    • Scenario Based Question (Jars)
    • What is Pig?
    • Differentiate between the logical and physical plan of an Apache Pig script?

    Section 7

    • What do you understand by an inner bag and outer bag in Pig?
    • Explain the difference between COUNT_STAR and COUNT functions in Apache Pig?
    • Explain about the scalar datatypes in Apache Pig.
    • Is it possible to join multiple fields in pig scripts?
    • What are the different String functions available in pig?
    • While writing evaluate UDF, which method has to be overridden?
    • Write a word count program in pig?
    • What is a skewed join?
    • How can I pass a specific hadoop configuration parameter to Pig?
    • What is the difference between Pig Latin and HiveQL ?

    Section 8

    • Does Pig support multi-line commands?
    • What is the function of UNION and SPLIT operators? Give examples.
    • How to load files with different delimiter each time in piglatin?
    • How to count a number of rows in alias
    • Is it possible to pivot a table in one pass in Apache Pig?
    • Bonus Lecture

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