Documents

Here You can get Oracle as well as related technology document which will help you to clear your technology specific doubts. 

Also there are multiple documents which can help you for implementation and monitoring purpose in your existing job.

1Z0-485 Study Guide

1Z0-027 Study Guide

1Z0-338 Oracle Exadata Database Machine and Cloud Service 2017 Implementation Essentials Study Guide

1Z0-070 Oracle Exadata X5 Administration Exam Study Guide

Managing Exadata with Oracle EM12c

Oracle Golden Gate Implementation

Oracle Dataguard Implementation

Exadata Exam Study Guide (1Z0-536)

Oracle 12c for Dummies

Exadata X3-2 machine specification 

Exadata X4 series Technical Overview

Exadata X4 Changes  

Auto Service Request (ASR)

Exadata X4-2 Datasheet

Active Dataguard on Exadata

Exadata Consolidation

Oracle DBA Checklist

Unix for DBA

Infiniband Architecture

Infiniband Technology Overview

EBS on Exadata

OEM 12c- Getting Started for Exadata

1Z0-053_Dumps

Oracle Exadata Consolidation

Oracle Exadata Consolidation Best Practice

Oracle Exadata Security Best Practice