Central Government Exams Guides
Expert tips and tutorials for 14 exams
📊 Comparisons & Differences
🛠️ Technical Tips
Reduce Photo Size in KB on Your Phone (Android & iPhone)
A step-by-step way to shrink a phone photo to 20KB, 50KB or 100KB for an online form without making it blurry — and why the obvious shortcuts fail.
How to Compress a PDF for an Online Application
Why certificate PDFs are too large, how to get them under 100KB, 200KB or 500KB, and how to keep the text readable when a portal has a strict limit.
How to Scan Documents With Your Phone for Government Forms
Get clean, readable, small scans of certificates, ID cards and marksheets using only your phone — lighting, framing, cropping and file-size tips.
iPhone Photos Rejected? HEIC vs JPG and How to Fix It
Why application portals reject iPhone photos, how to convert HEIC to JPG in seconds, and the camera setting that stops the problem for good.
💡 General Guidance
Exam Photo Rejected? 10 Common Reasons and How to Fix Each
Wrong pixel size, a file outside the KB range, HEIC instead of JPG, a sideways photo: 10 reasons portals reject photos and signatures, with a fix for each.
KB vs Pixels vs DPI: What Photo Upload Forms Check
Does 200 DPI change the KB? How many pixels is 3.5×4.5 cm? Which number does the portal check? KB, pixels and DPI explained with worked examples.
How to Add Name and Date on an Exam Photo (the Right Way)
When exams ask for your name and "date of photo" on the photograph, what they usually expect, how to add it neatly, and mistakes that lead to rejection.