Model N Member Technical Staff Interview Questions and Answers

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Q1. What is a arraylist
Ans. 
An ArrayList is a dynamic array in Java that can grow or shrink in size as needed.
• ArrayList is a class in Java's Collection framework.

• It allows for dynamic resizing of the array.

• Elements can be added, removed, or accessed using index.

• Example: ArrayList<String> names = new ArrayList<String>();
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Q2. What is hash map and how it works
Ans. 
A hash map is a data structure that stores key-value pairs and allows for efficient retrieval of values based on keys.
• Hash map uses a hash function to map keys to indices in an array.

• It allows for constant time average case complexity for insertion, deletion, and lookup operations.

• Collisions can occur when multiple keys hash to the same index, which can be resolved using techniques like chaining or open addressing.

• Exam...read more
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Q1. Basically on core java and collections
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Q1. Java program on data structures
Ans. 
Java program on data structures
• Use Java to implement common data structures like arrays, linked lists, stacks, queues, trees, and graphs

• Practice implementing algorithms like sorting, searching, and traversal on these data structures

• Understand the time and space complexity of different operations on data structures
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