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Tech forum for Java, algorithms & data-structures, Hibernate, RESTful API, Spring framework, Microservices architecture, Interview questions, Python, SDET, Machine learning, DevOps.

Installing PySpark with Jupyter notebook on Ubuntu 18.04 LTS

Carvia Tech | November 08, 2019 | 4 min read | 2 views

In this tutorial we will learn how to install and work with PySpark on Jupyter notebook on Ubuntu Machine and build a jupyter server by exposing it using nginx reverse proxy over SSL.

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Send GMAIL emails from Java and Spring

Carvia Tech | November 02, 2019 | 4 min read | 1 views

In this article we will learn how to send emails from Java and Spring boot applications using GMAIL provider, along with additional concepts like TLS vs SSL, App Passwords in GMAIL, plain-text vs rich multimedia emails.

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Send rich text multimedia email in Python

Carvia Tech | November 02, 2019 | 3 min read | 3 views

We will learn how to send rich text multimedia email in python. We will be using smtplib for email via GMAIL.

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AWS SDK 2.0 - S3 File upload & download in Java

Carvia Tech | October 31, 2019 | 4 min read | 31 views | AWS Tutorials

In this tutorial, we will walk through new AWS SDK 2.0 for doing object level operations on S3 bucket. We will specifically cover PutObject, GetObject and GetUrl operation on S3 Objects using AWS SDK 2.0

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Java 11 HttpClient with Basic Authentication

Carvia Tech | October 31, 2019 | 1 min read | 2 views | java-httpclient

We will create Java 11 HttpClient that accesses Basic Auth protected REST API resource using sync and async mode. We will use Kotlin for the reference implementation.

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Send email with attachment in Python

Carvia Tech | October 31, 2019 | 2 min read | 2 views

We are going to learn how to send email with attachment in python. We will be using smtplib for email via gmail client

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Check a number is Prime: Java Coding Problem

Carvia Tech | October 30, 2019 | 3 min read | 61 views | Java Coding Challenges

In this article we will learn if a given number is prime or not. The solution presented here may not be best optimized, but it should be sufficient from interview point of view.

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Send Mandrill emails from Spring Boot in Java

Carvia Tech | October 30, 2019 | 4 min read | 2 views

we will write code to send Mandrill emails (plain text, rich text, with attachments) from Java and Spring Boot applications with error handling and retry logic.

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Citibank Java developer interview questions

Carvia Tech | October 30, 2019 | 2 min read | 641 views | algorithm-datastructures investment banking

Java interview questions from Citibank in investment banking domain for experienced java developer - Core Java, Multi-threading, Concurrency, Garbage Collection, Design Patterns, Database concepts and Performance Tuning

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RuntimeError: get_session is not available when using TensorFlow 2.0

Carvia Tech | October 30, 2019 | 2 min read | 3 views | Flask - Python micro web framework

Here, we will see how we can upgrade our code to work with tensorflow 2.0 on removing get_session

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