How safe are you while using Public WiFi?

Never browse your confidential information with public WiFi.

These may be caused to you if a hacker exists in your network, as it a public WiFi and anyone could connect to it.



This is for educational purpose only.

To make people aware of the attacks that can happen in an Open WiFi.

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How fake popups and Notifications are stealing Credentails.

Not every Popup and Notifications that you visit on browsers are from particular authority. They may be tricky and can even steal your passwords.



This is an example just to show how these are happening.

This is for Educational purpose and for awareness on Online Attacks.

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Solution for Error ORA-01033 ORACLE initialization or shutdown in...

Error that you face after shutting down and opening the Oracle Developer.

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Connecting to SYS and Unlocking HR Account in Oracle SQL Developer Step ...

Connecting to Oracle Database And Unlocking HR Account 

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Downloading Oracle 12c

Install and download Oracle 12c for learning Oracle database developer. It also supports PL/SQL.

Downloading Oracle SQL Developer

We need to download Oracle 12c database from oracle website this is the latest version of oracle currently

You can follow the given link to download that

https://www.oracle.com/technetwork/database/enterprise-edition/downloads/oracle12c-windows-3633015.html

Check on the Accept License Agreement and Click on the winx64_12201_database.zip  file, Signup with oracle to download and install the file

You need to unlock the HR account to access the tables in HR Schema. Schema contains list of tables, we do our practical on HR schema.

One of the Schema in Oracle SQL Developer is HR Schema. It contains many tables such as employees, departments, locations, etc. We need to unlock the HR schema because it is present in pluggable database. Let’s see what pluggable database means

Oracle 12c have Container Databases and Pluggable databases.

One Container Database have many pluggable databases. Pluggable database have many schemas. Schemas consists of many tables.

In fig 2.1 you can see one Container Database (CDB), many pluggable Databases (PDBs) present in container databases.

Our HR schema is present in one of the Pluggable database. So we need to enter into the Container Database (CDB) and then to Pluggable database just like changing the directories (From root Directory to Sub-directories)

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How to download and install Oracle 12c in Windows 10 (Video)

Follow this video for downloading and installing Oracle 12c for learning Oracle.

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