Hello,
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You need to focus and concrete while having your preparation,
Although CS syllabus will be tough then expected, coding is not that easy then we hear for others.
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Mostly concentrate on syntax,loops, functions, basics, statements which helps you in understanding large concepts easily, which eventually makes your preparation easy and conveniently.
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Don't Hung your mind if you don't understand a thing, give some time to Brain to relax then try to fix it.
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Have patience and do it carefully by identifying mistakes and important statements which are important to code.
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Best of luck