Computer Applications Practicals are for 50 marks in CBSE Class 10 The HTML lab test constitutes of 20 marks the report file and viva voce constitute 20 marks and the project constitutes of 10 marks To score full marks in the practicals you just need to be well versed with the topics You can practise the different practical learnings again and again until you are confident about them While preparing your report file ensure that you are fully honest and careful about any mistakes or discrepancies whatsoever All the best