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Aptitude
Quantitative aptitude, logical reasoning, verbal ability and data interpretation — the first filter at TCS, Infosys, Wipro, Accenture, Goldman Sachs, D.E. Shaw and most campus drives. Every topic gives you the formulas first, then questions with full worked solutions.
Aptitude is the round most people stop preparing for once they can solve a medium LeetCode problem — and it's exactly why strong coders get filtered out before the interview even starts. Quantitative covers percentages, profit & loss, time-speed-distance and probability; logical reasoning covers puzzles, seating arrangements, syllogisms and blood relations; verbal covers reading comprehension, sentence correction and para jumbles; data interpretation covers tables, bar graphs, pie charts and caselets. Work through each topic's formulas first, then the worked questions — speed here comes from pattern recognition, not raw calculation.
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Service companies and most finance firms screen on aptitude before they ever look at your code. Learn the formulas cold, then practise under a timer — the bar is speed, not difficulty.
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