It depends on which degree you want to follow in SLIIT.

For example:

1) If you want to study BSc Eng (Hons) in Electrical & Electronic Engineering, then find below entry requirements.
G.C.E Advanced Level 3 passes (Sri Lanka) or 1C and 2D passes (Edexel / Cambridge) in Maths stream including a Credit pass in Mathematics or physics in one and the same sitting and a pass at the aptitude test to be conducted by SLIIT

2) If you want to study BSc (Hons) in Quantity Surveying 3 year degree programme, then find below entry requirements.
3 Passes Minimum G.C.E. Local/London A/L (or equivalent). Top-Up one year degree available for HND or equivalent qualification holders

3) If you want to study BBA (Hons) Degree, then find below entry requirements.
Passes in three subjects (in any subject stream) at the G. C. E. (Advanced Level) Examination (Sri Lanka) or 3D passes (Edexel/Cambridge) in one and the same sitting and a pass at the aptitude test conducted by the SLIIT.