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Core java - Interview Questions and Answers for 'Garmin' - 2 question(s) found - Order By Newest

Very frequently asked. Favorite question in Walk in Drive of many Indian service companies.
  Q1. Difference between TreeMap and HashMap ?Core Java
Anonymous
Ans. They are different the way their elements are stored in memory. TreeMap stores the Keys in order whereas HashMap stores the key value pairs randomly.

  Sample Code for treemap

  Sample Code for hashmap

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Related Questions

  Which of the following collections stores its elements in insertion Order ?

a. HashMap
b. TreeMap
c. LinkedHashMap
d. LinkedMap
  What is comparator interface used for ?
  Which of the following collection maintain its elements in Natural Sorted order ?
  Which are the sorted collections ?
  How can we reverse the order in the TreeMap ?
  TreeMap orders the elements on which field ?
  How TreeMap orders the elements if the Key is a String ?
  Can we add heterogeneous elements into TreeMap ?
  Will it create any problem if We add elements with key as user defined object into the TreeMap ?


Very Frequently asked to fresh graduates and less experienced. Favorite question in Walk in drives. Frequently asked in Indian Services companies.
  Q2. Difference between Overloading and Overriding ?Core Java
Anonymous
Ans. Overloading - Similar Signature but different definition , like function overloading.

Overriding - Overriding the Definition of base class in the derived class.

  Sample Code for overloading

  Sample Code for overriding

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Related Questions

  What is the difference between Encapsulation and Abstraction?
  Difference between Composition and Inheritance ?
 What is Polymorphism in Java ?
 Which of the following Java feature promotes access protection or Hiding ?

a. Inheritance
b. Encapsulation
c. Abstraction
d. Composition
  What are the features of encapsulation ?
  How is Abstraction implemented in Java ?
  Difference between Encapsulation and Data Hiding ?
  Difference between Abstraction and Implementation hiding ?
  What are the examples of Abstraction in Java ?




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