Go through with syllabus and prepare based on it. For easy sted if you can spend some money your can some RRB ALP Practice test online. Some online institutes may provide the first mock test will be free of cost.
Firstly you should know the Syllabus of the RRB ALP exam then according to the syllabus you can start your further practise - So I m going to tell you RRB ALP syllabus - Maths - upto 10th class Reasoning General knowledge Technical question (ITI) General science Try to practice with previous year question It also help you to understand the RRB paper pattern. Main advantage of solving the last year papers is that you can find your weak and strong field and prepare yourself accordingly.,.