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Interview Questions and Answers for 'Google' - 11 question(s) found - Order By Newest

Advanced level question usually asked in High end product companies. Have been asked in Google and Amazon (Based on 1 Feedback)
  Q1. Describe, in general, how java's garbage collector works ?Core Java
Anonymous
Ans. The Java runtime environment deletes objects when it determines that they are no longer being used. This process is known as garbage collection. The Java runtime environment supports a garbage collector that periodically frees the memory used by objects that are no longer needed. The Java garbage collector is a mark-sweep garbage collector that scans Java dynamic memory areas for objects, marking those that are referenced. After all possible paths to objects are investigated, those objects that are not marked (i.e. are not referenced) are known to be garbage and are collected.

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Try 4 Question(s) Test


Basic and Very Frequently asked.
  Q2. What is Polymorphism in Java ?Core Java2016-11-06 09:10:54

Ans. Polymorphism means the condition of occurring in several different forms.

Polymorphism in Java is achieved in two manners

1. Static polymorphism is the polymorphic resolution identified at compile time and is achieved through function overloading whereas

2. Dynamic polymorphism is the polymorphic resolution identified at runtime and is achieved through method overriding.

  Sample Code for overloading

  Sample Code for overriding

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Try 2 Question(s) Test


 Q3. Write a program to print the index of the first non repeated character in a java stringCore Java2017-01-27 18:30:21

Ans. public class BuggyBread1{
public static void main (String args[]) {
   String str = "hheello world";
   char[] charArray = str.toCharArray();
   char selectedChar = 'a';
   for(char char1: charArray){
      if(!str.contains(Character.toString(char1).concat(Character.toString(char1)))){
         selectedChar = char1;
         break;
      }
   }
   System.out.println(str.indexOf(Character.toString(selectedChar)));
}
}

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   Like      Discuss      Correct / Improve     string  code  coding     Audible  Bluewolf  WorkDay  Symantec  Rubicon  Amazon  Expedia  A9.com  Google


 Q4. If you have access to a function that returns a random integer from one to five, write another function which returns a random integer from one to seven.Core Java
Admin
info@buggybread.com
Ans. We can do that by pulling binary representation using 3 bits ( random(2) ).

getRandom7() {
   String binaryStr = String.valuesOf(random(2))+String.valuesOf(random(2))+String.valuesOf(random(2));
   binaryInt = Integer.valueOf(binaryStr);
   int sumValue=0;
   int multiple = 1;
   while(binaryInt > 0){
      binaryDigit = binaryInt%10;
      binaryInt = binaryInt /10;
      sumValue = sumValue + (binaryDigit * multiple);
      multiple = multiple * 2;
   }
}

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   Like      Discuss      Correct / Improve     java   tricky question   interesting questions   google interview questions   random


 Q5. What are fail-fast Iterators ?Core Java2016-06-09 09:27:36

Ans. Fail-fast iterators detect illegal concurrent modification during iteration and fail quickly and cleanly rather than risking arbitrary, non deterministic behavior at an undetermined time in future. Example could be of an Iterator failing if it smells ConcurrentModificationException.

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   Like      Discuss      Correct / Improve     fail-fast Iterators  Iterators     Roposo  Elitecore Technologies  Google  InfoTrellis  Infosys      intermediate


 Q6. Given two files with list of words, write a program to show the common words in both filesCore Java2017-01-28 11:31:20

 This question was recently asked at 'Google'.This question is still unanswered. Can you please provide an answer.


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   Like      Discuss      Correct / Improve     file handling  file io  code  coding     Google


Frequently asked in high end product companies.
 Q7. Write code for LRU CacheCore Java2017-01-10 10:15:17

 This question was recently asked at 'United Health Group (UHG),Google,Zenefits,Amazon,Microsoft,SurveyMonkey,LinkedIn,Sanpdeal,MarkMonitor,Bloomberg'.This question is still unanswered. Can you please provide an answer.


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   Like      Discuss      Correct / Improve     cache  LRU cache  coding  code     United Health Group (UHG)  Google  Zenefits  Amazon  Microsoft  SurveyMonkey  LinkedIn  Sanpdeal  MarkMonitor  Bloomberg      intermediate


 Q8. Write a Program to check number of occurrences of one string within another ? Core Java2017-01-27 14:44:07

Ans. public class Class{
   public static void main(String[] args){
      String string1 = "Hello I am Jack. I live in United States. I live in california state.";

      String string2 = "I live in";

      int startIndex = 0;
      int endIndex = string1.length()-1;

      int countNoOfOccurences = 0;

      String remainingString = string1;

      while(startIndex < endIndex){
         if(remainingString.indexOf(string2) != -1){
            countNoOfOccurences++;
            startIndex = remainingString.indexOf(string2) + string2.length();
            remainingString = remainingString.substring(startIndex);
         } else {
            break;
         }
      }

      System.out.println(countNoOfOccurences);
   }
}

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   Like      Discuss      Correct / Improve     string  code  coding     Google  Zoho


 Q9. Given a graph, find if it represents a treeAlgorithm2017-03-03 14:41:06

 This question was recently asked at 'Google'.This question is still unanswered. Can you please provide an answer.


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   Like      Discuss      Correct / Improve          Google



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  Q10. Find Intersection/union between two arrays.Core Java2018-05-13 19:40:34

 This question was recently asked at 'Bristlecone,Amazon Lab126,Amazon,Microsoft,Facebook,NCR,Google'.This question is still unanswered. Can you please provide an answer.


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   Like      Discuss      Correct / Improve     arrays  code  coding     Bristlecone  Amazon Lab126  Amazon  Microsoft  Facebook  NCR  Google        frequent


  Q11. Write code to sort an array.Algorithm2018-07-04 16:15:16

 This question was recently asked at 'Deloitte,Match,Ebates,Google,Zento,Zillow,UXP Systems,HCL Technologies,Infosys,IDEMIA,Optym,Groupon,Tata Consultancy (TCS),Arbeiten bei Zeus,Accenture'.This question is still unanswered. Can you please provide an answer.


 Help us improve. Please let us know the company, where you were asked this question :   

   Like      Discuss      Correct / Improve     array  sorting     Deloitte  Match  Ebates  Google  Zento  Zillow  UXP Systems  HCL Technologies  Infosys  IDEMIA  Optym  Groupon  Tata Consultancy (TCS)  Arbeiten bei Zeus  Accenture      basic        frequent




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