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Top 40 Java interview questions for freshers 2026 asked at TCS NQT, Infosys InfyTQ, Accenture with answers and 12 Java code examples. Collections table, OOP weightage table, 4-week prep plan.
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Top 40 SQL interview questions for freshers and experienced in 2026 with answers and 12 working code examples. Joins comparison table, window-function examples, TCS NQT + Infosys patterns covered.
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Top 40 Python interview questions for freshers 2026 actually asked at TCS NQT, Wipro NLTH, Infosys InfyTQ with answers and code. Topic-weightage table, company-round table, 4-week prep plan included.
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Types of operating systems in 2026 explained with examples: 12 OS categories including batch, time-sharing, real-time (RTOS), distributed, network, mobile, multiprocessor, and embedded with architecture and use cases.
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