Method Overloading Interview Questions in Java

How compiler resolves ambiguous method overloading call. OR
Which overloaded method will get selected for null parameter in java. OR
Important Java Interview Questions On Method Overloading OR
Method Overloading Tutorial

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Method Overloading Interview Questions in Java. Can we overload static method in Java. Method overloading Java rules.

What is method overloading?

If a class have multiple methods with same name but with different parameters list, it is known as Method Overloading. Parameters lists should differ in either,

1. Number of parameters.
2. Data type of parameters.
3. Sequence of data type of parameters. 

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Types of Binary Tree.

Types of Binary Tree.

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Types of Binary Tree in Data Structure. Let's see Binary Tree types with example. There are mainly 3 types of Binary trees.

1. Full binary tree / Proper binary tree / 2-tree / Strictly binary tree) 
2. Perfect Binary Tree. 
3. Complete Binary Tree:

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Print Linked List In Reverse Order in Java

Print Linked List In Reverse Order in Java.

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Print linked list in reverse order in java. print singly linked list in reverse order using recursion. java program to print linked list in reverse.

Let's understand the problem statement in simple words, 
You are given a Singly linked list, print the linked list in reverse way, from end to start.

Example: 
Input:     10 -> 20 -> 30 -> 40 -> 50 -> null
Output:  50      40     30      20      10
 

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Find Minimum length Unsorted Subarray, Sorting which makes the complete array sorted.

Find Minimum length Unsorted Subarray, Sorting which makes the complete array sorted.

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Find minimum unsorted subarray index m and n such that if you sort elements from m through n, then complete array would be sorted.

Let's understand the problem statement in simple words, 
Given an array of partially sorted integers, you have to find start index 'm' from where mismatch started that is the point from which array is not in sorted order,  and you have to find index 'n' till which index array is unsorted, and if you sort elements m through n, then entire array would be sorted.  

Let's see example to understand what is the input and expected output.

Find smallest window in array sorting which will make entire array sorted

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Count trailing zeros in factorial of a number.

Count trailing zeros in factorial of a number.

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Count trailing zeros in factorial of a number. there are many ways to count trailing 0 in factorial of number. Java program to count trailing zero.

What is Trailing Zero in a number?
Trailing zeros are a sequence of 0 in the decimal representation of a number, after which no other digits follow.

Example: 5! = 120
Number of Trailing Zero = 1

Example: 7! = 5040
Number of Trailing Zero = 1

Example: 10! = 3628800
Number of Trailing Zero = 2

Below you can get Factorial of number till 20 for testing Trailing Zeros in java program.

Count trailing zeros in factorial of a number

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Swap two numbers In Java without using third variable.

Swap two numbers In Java without using third variable.

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Swap two numbers In Java without using third variable. Write a program to swap/exchange 2 numbers without using temporary or third variable.

There are many approaches to solve this problem, we will see all of them one by one.

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BFS vs DFS with Example in Java

BFS vs DFS with Example

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Breadth First Search(BFS) Vs Depth First Search(DFS) with example in Java. DFS uses Stack while BFS uses Queue.

Given two words, startWord and endWord, and a dictionary, find the length of shortest transformation sequence from startWord to endWord.
Rules:
1. Only one letter can be changed at a time.
2. Each intermediate word must exist in the dictionary.

Input
startWord     = CAT
endWord      = DOG
dictionary    = CAT, BAT, COT, COG, COW, RAT, BUT, CUT, DOG, WEB 

Output
One shortest transformation is CAT –> COT –> COG –> DOG.
the program should return Path and its length 4.

Let's look at few more example and better understand problem statement.

There can be many paths for reaching from startWord to endWord, but we have to find shortest path possible.

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Can static method be called using object in java

Java Interview Questions

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Can static method be called using object in java. Static methods are called by Class name. Static members belongs to class.

Java interview questions and answers focused on "Method overriding and Method hiding".
There are interview questions on other topics like Multithreading, Exception Handling, Type Casting, Ambiguous Overloaded methods etc with detailed explanation on each question.

You will get link of all articles at bottom of this post.

 

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Can we override static methods in java. Explain with example.

Can we override static methods in java. Explain with example.

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Can we override static methods in java. Static methods cannot be overridden because Static methods are not polymorphic in nature.

 
Java interview questions and answers focused on "Method overriding and Method hiding". 

There are interview questions on other topics like Multithreading, Exception Handling, Type Casting, Ambiguous Overloaded methods etc with detailed explanation on each question.

You will get link of all articles at bottom of this post.

 

Read more

Method overriding and Method hiding Interview Question in Java

Method overriding and Method hiding Interview Question in Java

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Method overriding and Method hiding Interview Question in Java. Can we Override static methods in java? What is method hiding in Java?  
 
Java interview questions and answers focused on "Method overriding and Method hiding".
There are interview questions on other topics like Multithreading, Exception Handling, Type Casting, Ambiguous Overloaded methods etc with detailed explanation on each question.

You will get link of all articles at bottom of this post.

 

Read more