Please download the file from the Code files link and extract the file on to your desktop folder. Check if you have Bangalore.jpg file in the extracted folder.
Open the QGIS interface and click on the Layer menu on the top, from the drop-down options select "Add Layer", from the sub-menu select "Add Raster Layer" option. In the dialog-box select the Bangalore.jpg file. Click on "Open" button at the bottom of the dialog-box.
Bangalore.jpg map opens in the QGIS canvas.