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Proactive in Big Data Solutions

Harshit Jain

Harshit Jain

  • Java
    • Trapping Rain Water between Towers
    • JVM Architecture – Understanding JVM Internals
    • Memory Management In Java – Stack And Heap
    • Idempotent REST APIs
    • Minimum Absolute Difference Between Any Two Elements Of An Array
    • How To Find Type, Total Space, Free Space And Usable Space Of All Drives In Java?
    • Memoization in java
    • Writing Java 7 functions in Lambda form:
    • Disjoint a connected Graph by removing minimum edges.
    • Solid Principles in Java:
    • Java 8 Streams
    • Multithreading Interview Question & Answers
    • Core Java Tricky Interview Questions
    • Difference-between-shallow-copy-vs-deep-copy-in-java/
    • Various Forms of SimpleDateFormat
    • Double Brace Initialization
    • Best Practise to Override Equals Method of Object Class
    • Random Number with Seed
    • Java String intern()
    • String Pool Constant
    • JVM: Does the 32-Bit JVM or 64-Bit JVM Decision Matter Anymore?
    • Print Odd And Even Numbers By Two Threads In Java
    • Configuration to Create Java Project Jar with Dependencies
    • Java SynchronousQueue Examples
    • Solving Real Time Queries Using Java 8 Features -Employee Management System
    • Java 8 Collectors Tutorial
    • Java is Pass by Value and Not Pass by Reference
    • Simple Deadlock Program in Java
    • Best Time to Buy and Sell Stock
    • Find Moving Average of Last N numbers in a Stream.
    • Authentication and Authorization in Microservices
  • Scala
    • Scala : Get Start with
    • Implicit keyword in SCALA:
    • Closures in Scala
    • Currying Functions in Scala
    • Basic Scala Interview Questions and Answers
    • Null, null, Nil, Nothing, None, and Unit in Scala
    • Intermediate Scala Interview Questions and Answers
  • Spark
    • Spark Performance Tuning
    • Big Data File Formats
    • A comparison between RDD, DataFrame and Dataset in Spark
    • groupByKey vs reduceByKey vs aggregateByKey in Apache Spark/Scala
    • Pivot and Unpivot a Spark DataFrame
    • Spark SQL functions lit() and typedLit()
    • Spark Word Count Example Using Hadoop as File Store
  • Sorting
    • Bubble Sort
    • Selection Sort
    • Insertion Sort
    • Merge Sort
    • Quick Sort
    • Sorting
    • Big O Notation and Time Complexity of Algorithm
    • RADIX SORT
    • Heap Sort
  • SQL
    • SQL Indexing
    • PostgreSQL: How To Delete Duplicate Rows in PostgreSQL
    • PostgreSQL: Common Table Expressions or CTEs:
    • PostgreSQL: Compare Two Tables in PostgreSQL
    • PostgreSQL: Self-Join:
    • PostgreSQL: How to Generate a Random Number in a Range
    • PostgreSQL: NULLIF function:
    • PostgreSQL: COALESCE function:

PostgreSQL: Compare Two Tables in PostgreSQL

June 17, 2019July 17, 2019 by HARHSIT JAIN, posted in PostgreSQL, SQL

PostgreSQL Comparing Tables

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PostgreSQL: How To Delete Duplicate Rows in PostgreSQL

June 17, 2019July 17, 2019 by HARHSIT JAIN, posted in PostgreSQL, SQL

Delete Duplicate Rows

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PostgreSQL: How to Generate a Random Number in a Range

June 15, 2019July 17, 2019 by HARHSIT JAIN, posted in PostgreSQL, SQL

Generate Random Number

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RADIX SORT

June 5, 2019July 17, 2019 by HARHSIT JAIN, posted in Data Structures, JAVA, Sorting

Radix Sort

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Intermediate Scala Interview Questions and Answers

May 31, 2019August 25, 2019 by HARHSIT JAIN, posted in Scala

Advanced Scala Interview Preparation Notes

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Basic Scala Interview Questions and Answers

May 30, 2019August 25, 2019 by HARHSIT JAIN, posted in Scala

Basic Scala Interview Preparation Notes

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Memoization in java

May 29, 2019July 17, 2019 by HARHSIT JAIN, posted in JAVA

Memoization ensures that method does not execute more than once for same inputs by storing the results in the data structure.

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Big O Notation and Time Complexity of Algorithm

May 27, 2019July 17, 2019 by HARHSIT JAIN, posted in Data Structures, JAVA

Java Complexity Analysis

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Idempotent REST APIs

May 27, 2019July 17, 2019 by HARHSIT JAIN, posted in Rest APIs

Multiple identical requests has the same effect as making a single request.

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Quick Sort

May 26, 2019July 17, 2019 by HARHSIT JAIN, posted in Data Structures, JAVA, Sorting

Quick Sort

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Heap Sort

May 23, 2019May 25, 2019 by HARHSIT JAIN, posted in Data Structures, JAVA, Sorting

Heap Sort using Complete Binary Tree Data Structure

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Merge Sort

May 23, 2019July 17, 2019 by HARHSIT JAIN, posted in Data Structures, JAVA, Sorting

Merge Sort

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Recent Posts

  • Java 8 interview questions & answers January 16, 2022
  • SPARK: Coalesce VS Repartition October 15, 2019
  • Pivot and Unpivot a Spark DataFrame September 27, 2019
  • Spark SQL functions lit() and typedLit() September 26, 2019
  • Spark Performance Tuning September 10, 2019

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Java & Big Data Interview Notes

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