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♦ Find the first non repeated character in a given string input

Pseudocode 1) Precodnition check for null or empty input. 2) Loop throught the input string, and store each “character” as a key in a map with the value being the “character count”. For example, an input string of “stress” would have Key –Value s -3 t -1 r -1 e...

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01: ♦ 17 FAQ Java Collection interview questions answered on differences between X & Y

Java Collections interview questions and answers and Java String class interview Q&As are must know as you can’t write any decent Java application without these 2 APIs. This post focuses on Java Collection interview Q&As on differences between X and Y based on the Java Collection Framework (i.e. … Read...

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02: ♦ 9 Java Collection interview Q&As on choosing the right data structure

Java Collection interview Q&As on choosing the right data structure as it is vital to choose the right data structure to get the job done with proper space vs performance trade-offs. Q1. What are the common data structures, and where would you use them? A1. … Read more ›...

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02: ♦ Java 8 Streams, lambdas, intermediate vs terminal ops, and lazy loading with simple examples

A stream is an infinite sequence of consumable elements (i.e a data structure) for the consumption of an operation or iteration. Any Collection<T> can be exposed as a stream. It looks complex, but once you get it, it is very simple. The operations you perform on a stream can either...

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03: Understanding Big O notations through Java examples

Q. Have you seen job advertisements requiring Java candidates to work in real-time or high volume transaction processing systems? If you are applying for such jobs, you can be quizzed on Big O notation. Here are some basics to brush up on. … Read more ›...

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