From 1a3d9e688d20c6c0b0f2de995a977e8d57b32663 Mon Sep 17 00:00:00 2001
From: Abdelrahman Badreldeen <abdelrahmanbadr.it@gmail.com>
Date: Mon, 1 Jun 2020 10:46:40 +0200
Subject: [PATCH 1/2] change AWS image extension from jpg to png (#86)

Co-authored-by: Abdelrahman Badreldeen <abdelrahman.badreldeen@scratchpay.com>
---
 images/{aws.jpg => aws.png} | Bin
 1 file changed, 0 insertions(+), 0 deletions(-)
 rename images/{aws.jpg => aws.png} (100%)

diff --git a/images/aws.jpg b/images/aws.png
similarity index 100%
rename from images/aws.jpg
rename to images/aws.png

From a1099473cf2fe5bbdc9f0ac87c7684d3285dd31e Mon Sep 17 00:00:00 2001
From: Abdelrahman Badreldeen <abdelrahmanbadr.it@gmail.com>
Date: Mon, 1 Jun 2020 11:48:30 +0200
Subject: [PATCH 2/2] Added question "What is an index in a database?" (#88)

* change AWS image extension from jpg to png

* add index question in DB section

Co-authored-by: Abdelrahman Badreldeen <abdelrahman.badreldeen@scratchpay.com>
---
 README.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/README.md b/README.md
index 0ec5262..208a447 100644
--- a/README.md
+++ b/README.md
@@ -8897,6 +8897,13 @@ A single data source (at least usually) which is stored in a raw format.
 <summary>What is OLAP (Online Analytical Processing)?</summary><br><b>
 </b></details>
 
+
+<details>
+<summary>What is an index in a database?</summary><br><b>
+
+A database index is a data structure that improves the speed of operations in a table. Indexes can be created using one or more columns, providing the basis for both rapid random lookups and efficient ordering of access to records.
+</b></details>
+
 ## Regex
 
 Given a text file, perform the following exercises