| Answer Keys GATE 2015 | |
| AE: Aerospace Engineering | GG: Geology and Geophysics |
| AG: Agricultural Engineering | IN: Instrumentation Engineering |
| AR: Architecture and Planning | MA: Mathematics |
| BT: Biotechnology | ME: Mechanical Engineering ( ME01 ME02 ME03 ) |
| CE: Civil Engineering ( CE01 CE02 ) | MN: Mining Engineering |
| CH: Chemical Engineering | MT: Metallurgical Engineering |
| CS: Computer Sc. and Information Technology ( CS01 CS02 CS03) | PH: Physics |
| CY: Chemistry | PI: Production and Industrial Engineering |
| EC: Electronics and Communication Engg. ( EC01 EC02 EC03) | TF: Textile Engineering and Fibre Science |
| EE: Electrical Engineering ( EE01 EE02) | XE: Engineering Sciences |
| EY: Ecology and Evolution | XL: Life Sciences |
| Answer Keys GATE 2016 | |
| AE: Aerospace Engineering | GG: Geology and Geophysics |
| AG: Agricultural Engineering | IN: Instrumentation Engineering |
| AR: Architecture and Planning | MA: Mathematics |
| BT: Biotechnology | ME: Mechanical Engineering ( ME01 ME02 ME03 ) |
| CE: Civil Engineering ( CE01 CE02 ) | MN: Mining Engineering |
| CH: Chemical Engineering | MT: Metallurgical Engineering |
| CS: Computer Sc. and Information Technology ( CS01 CS02) | PE: Petroleum Engineering |
| CY: Chemistry | PH: Physics |
| EC: Electronics and Communication Engg. ( EC01 EC02 EC03) | PI: Production and Industrial Engineering |
| EE: Electrical Engineering ( EE01 EE02) | TF: Textile Engineering and Fibre Science |
| EY: Ecology and Evolution | XE: Engineering Sciences (A-G) |
| XL: Life Sciences (H-M) | |
| Answer Keys GATE 2017 | |
| AE: Aerospace Engineering | GG: Geology and Geophysics |
| AG: Agricultural Engineering | IN: Instrumentation Engineering |
| AR: Architecture and Planning | MA: Mathematics |
| BT: Biotechnology | ME: Mechanical Engineering ( ME01 ME02) |
| CE: Civil Engineering ( CE01 CE02 ) | MN: Mining Engineering |
| CH: Chemical Engineering | MT: Metallurgical Engineering |
| CS: Computer Sc. and Information Technology ( CS01 CS02) | PE: Petroleum Engineering |
| CY: Chemistry | PH: Physics |
| EC: Electronics and Communication Engg. ( EC01 EC02) | PI: Production and Industrial Engineering |
| EE: Electrical Engineering ( EE01 EE02) | TF: Textile Engineering and Fibre Science |
| EY: Ecology and Evolution | XE: Engineering Sciences (A-H) |
| XL: Life Sciences (P-U ) | |