Java Collection interview Q&As on choosing the right data structure as it is vital to choose the right data structure to …
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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. … … Read more ›...
03: Understanding Big O notations
Q. Have you seen job advertisements requiring Java candidates to work in real-time or high volume transaction processing systems? If you … … Read more ›...
04: 7 Java Collection Quizzes
Q1. When is an object needs to implement the Comparable interface? a) When adding it to a HashSet. b)… … Read more ›...
05: 4 Sorting objects in Java interview Q&As
Sorting objects in Java interview Q&As especially understanding Comparable & Comparator interfaces in Java for natural & custom sorting respectively. Q1… … Read more ›...
06: HashMap & HashSet and how do they internally work? What is a hashing function?
HashMap & HashSet are not only one of the frequently used data structures, but also one of the popular interview topics.… … Read more ›...
07: Java Iterable Vs Iterator differences and know how
Q1. What are the differences between Iterator<T> Vs Iterable<T>?
A1. The “Iterable” was introduced to be able to use …
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08: If Java did not have a stack or map, how would you ….
Q1 If Java did not have a Stack implementation, how would you go about implementing your own? A1 1) Determine the … … Read more ›...
09: When to use which Java data structure? and why?
List, Set, Map, and Queue(access the ends FIFO or LIFO) are the basic Java data structure interfaces … … Read more ›...
10: 8 Java Maps & Caching Data in Java Interview Q&As
Q1. What is the purpose of a Map interface in Java collection API? A1. A map is a set of associations… … Read more ›...
17 FAQ Java Collection interview Q&As
Java Collections interview questions and answers and Java String class interview Q&As are must know as you can’t write any decent … … Read more ›...
Java 8: Different ways to sort a collection of objects in pre and post Java 8
The object we are going to sort is a Person. Option 1: Writing your own Comparator implementation. This can … … Read more ›...
Sorting a Map by values instead of keys
This post is motivated by ““Sorting a list or array of numbers by frequency of occurrences in Java”
Sorting a …
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