Recognise the common problem patterns and write clean Java solutions under time pressure.
Interview soon? Read the first 3 guides (marked "Start here") first, then the rest.
Data structures and algorithms explained in compact notes.
100 programs with solutions to practise writing by hand.
The same problems solved with streams, as many interviewers now ask.
String manipulation, the most common coding-round theme.
Output-prediction questions from online tests.
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