Java Interview Uncommon Questions With Answers

How to detect a loop in LinkedList?
Traverse the list one by one and keep putting the node addresses in a HashTable. At any point if NULL is reached then return false and if next of the current node point to any of the previously stored nodes in HashTable then return true.

 What is SOLID Principle?
Single-responsibility principle
A class should only have a single responsibility, that is, only changes to one part of the software's specification should be able to affect the specification of the class.
Open–closed principle
"Software entities ... should be open for extension, but closed for modification."
Liskov substitution principle
"Objects in a program should be replaceable with instances of their subtypes without altering the correctness of that program." 
Interface segregation principle
"Many client-specific interfaces are better than one general-purpose interface.
Dependency inversion principle
One should "depend upon abstractions, [not] concretions."
Investor & Coder.

Comments

Post a Comment

Thank You for reading our post.
Your comment or feedback encourages us to improve the quality of content.
Don't forget to follow/subscribe to get the latest post.

Popular posts from this blog

Core Java Interview Question's Answers - 2

   What is overloading? The process of writing multiple methods with the same name in a class is known as Method Overloading . Here parameter list must be different in terms of Number or Order or Type of parameter( NOT ). Method name and parameter list together is known as Method Signature so in short we can say in case of Overloading Method Signature must be different.  Method Signature does not include Return type of method so Return type can be anything. Method Overloading is also known as Early Binding or Compile Time Polymorphism or Static Polymorphism . It is known as Early Binding because from the invocation statement which actual version of methods will be invoked, this binding is made earlier the execution of program by  the compiler. It is known as Compile Time Polymorphism because Compiler is making decision during the Compilation process about which exact methods. What is overriding? If we are not okay with the m...
Read more

Xylem bangalore : Senior Java Developer.

Dated - May 2020 1st Round - HackerRank Test. Day - I   Question:  Java program for performing the arithmetic addition. Question:  Java program to implement deep cloning. Question: Arrange the Words A Sentence is defined as a string of space separated words that starts with a capital letter followed by lowercase letters and spaces, and ends with a period. That is, it satisfies the regular expression ^ [A-Z][a-z] *\.$. Rearrange the words in a sentence while respecting the following conditions. Each word is ordered by length, ascending. Words of equal length must appear in the same order as in the original sentence. The rearranged sentence must be formatted to satisfy the regular expression  ^ [A-Z][a-z] *\.$ Example 1. sentence= Cats and hats. Order the sentence  by word's length and keep the original order for the words with same length. Length 3: {and} Length 4: {Cats, hats} Example 2. Input: "The lines are printed in reverse order." Output: "In the ...
Read more

FieldEz Technologies Bangalore Java Developer Interview

Exp -(2-4) years. Date - May 2020 1st Round - Technical. Mode - Telephonic. Day - I Interviewer - Satyadeep Gaur We have  String str= "I am java developer"; How to print the words of this string in reverse order so that it should print developer java am I String str="I am java developer"; String obj[]=str.split(" "); for(int i=obj.length-1;i>=0;i--){    System.out.println(obj[i]); } How many times for loop in the above piece of code will execute. Answer - 5 What is the time complexity in the above code? Answer - O(n) How to minimize the loop iteration to make the time complexity as O(n/2)? We have a ArrayList containing a lot of elements, I want to find the duplicate elements, How to do that? We have a String str="Hello World", I want to print it after every 5 second? Explain the code to do this. What are oops features? I don't want definition.Explain all with coding work that you do on daily basis. What is singleton class? What is garbage...
Read more