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Interview Questions and Answers for 'Sears' - 15 question(s) found - Order By Newest

Advanced level question frequently asked in US based companies. Recently asked in EMC and Intuit.
  Q1. Can you provide some implementation of a Dictionary having large number of words ? Solution
Admin
info@buggybread.com
Ans. Simplest implementation we can have is a List wherein we can place ordered words and hence can perform Binary Search.

Other implementation with better search performance is to use HashMap with key as first character of the word and value as a LinkedList.

Further level up, we can have linked Hashmaps like ,

hashmap {
a ( key ) -> hashmap (key-aa , value (hashmap(key-aaa,value)
b ( key ) -> hashmap (key-ba , value (hashmap(key-baa,value)
....................................................................................
z( key ) -> hashmap (key-za , value (hashmap(key-zaa,value)
}

upto n levels ( where n is the average size of the word in dictionary.

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Frequently asked to experienced developers. Recently asked in many US interviews.
 Q2. What is database deadlock ? How can we avoid them?Database
Admin
info@buggybread.com
Ans. When multiple external resources are trying to access the DB locks and runs into cyclic wait, it may makes the DB unresponsive.

Deadlock can be avoided using variety of measures, Few listed below -

Can make a queue wherein we can verify and order the request to DB.

Less use of cursors as they lock the tables for long time.

Keeping the transaction smaller.

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Very frequently asked. Usually asked with questions related to String.
  Q3. What is an Immutable Object ?Core Java
Anonymous
Ans. Object that can't be changed after instantiation.

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 Q4. What are the pre-requisite for the collection to perform Binary Search ?
Admin
info@buggybread.com
Ans. 1. Collection should have an index for random access.
2. Collection should have ordered elements.

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   Like      Discuss      Correct / Improve     java   collections   search algorithm   search   binary search   at&t      intermediate


Very frequently asked if being interviewed for hibernate. Frequently asked in Tata Consultancy (TCS) and Overstock.com
  Q5. Difference between load and get ?Hibernate
Admin
info@buggybread.com
Ans. If id doesnt exist in the DB load throws an exception whereas get returns null in that case.get makes the call to DB immediately whereas load makes the call to proxy.

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 Q6. Can we use Ordered Set for performing Binary Search ?
Admin
info@buggybread.com
Ans. We need to access values on the basis of an index in Binary search which is not possible with Sets.

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Frequently asked in face to face interviews.
  Q7. Write a program to print fibonacci series.Core Java

Ans. int count = 15;
int[] fibonacci = new int[count];
fibonacci[0] = 0;
fibonacci[1] = 1;
for(int x=2; x < count; x++){
fibonacci[x] = fibonacci[x-1] + fibonacci[x-2];
}

for(int x=0; x< count; x++){
System.out.print(fibonacci[x] + " ");
}

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Frequently asked to Fresh graduates.
 Q8. Write a program to implement Binary search ?Core Java2016-10-18 10:49:58

Ans. http://algs4.cs.princeton.edu/11model/BinarySearch.java.html

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 Q9. What is Spring Boot ?Spring Boot2016-12-19 06:23:21

Ans. Spring Boot is Springs convention-over-configuration solution for creating stand-alone, production-grade Spring-based Applications.

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  Q10. What is Maven ?Maven2016-12-19 10:53:13

Ans. Maven is a build automation tool used primarily for Java projects.

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 Q11. Write a Program to print factorial of a number using recursionCore Java2017-01-29 17:47:20

Ans. public class BuggyBread {
public static void main(String args[]) {
System.out.println(factorial(5));
}

private static int factorial(int number){
if(number == 1){
return 1;
} else {
return number * factorial(number - 1);
}
}
}

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 Q12. How Cassandra provides better Read performance than Oracle Indices ?Database2017-08-18 09:39:56

Ans. Cassandra uses Hash Search which provides a look time of O(1) whereas Oracle Indices uses Binary Search that provide a lookup time of O(Log n).

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   Like      Discuss      Correct / Improve     cassandra  hash search  hash search vs binary search


 Q13. How different is the Search algorithm when we query Cassandra Tables and When we query Oracle Tables ?Cassandra2017-08-18 09:40:40

Ans. Relational Database uses linear search if we don't query using indices. Performance for linear search is O(n). If indices have been used , relational database uses binary search. Performance for binary search is O(Log n).

Casandra uses hash search. Performance for Hash Search is O(1).

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 Q14. Explain Binary SearchAlgorithm2018-02-02 08:37:31

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


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 Q15. Binary Search requires that the collection should beAlgorithm
a. Sorted in Ascending Order
b. Sorted in Descending Order
c. Sorted in any Order
d. Unsorted

Ans.c. Sorted in any Order



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