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The first filter is eligibility. Companies announce criteria for each drive: minimum marks, branch, year of passing, and sometimes rules about backlogs. If you do not meet them, you may not be considered, however good your resume. This is why it helps to check the criteria before you apply, and to ask your placement cell if you are unsure. Do not misstate your record to meet a rule, because documents are usually checked later.
The second filter is the application itself. A recruiter or a screening tool may look at the resume and the form in a minute or less. Clear structure, correct details, projects explained in a couple of lines and a tidy layout all help. Missing information, spelling mistakes, an unclear email address or a resume that runs to four pages tends to lead to a quick no.
The third is often a test. Many companies use an online test for aptitude, reasoning, English or coding, and use the scores to decide who is interviewed. This is where preparation counts most, and it is why timed practice matters. The cut-off may be a score or a rank, and it can change from drive to drive.
The fourth is a group discussion or a first conversation. This round is often short and looks for clarity, communication and how you work with others.
Only after these steps does the real interview begin. Students who say 'I was never even called' are often describing one of the earlier filters.
What can you control? Check your eligibility before applying. Keep your resume to one clear page and the same as your online profile. Fill forms carefully and read each one twice before submitting. Practise the tests under timed conditions. Prepare for the group discussion. And ask your placement cell and seniors what each company used last year, because the pattern repeats more than you might expect.
What you cannot control, such as the number of applicants or a company's cut-off, is worth letting go. Keep applying, keep improving the parts you can, and treat each shortlist as information about where to work next.