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Database - Interview Questions and Answers for 'Sears' - 3 question(s) found - Order By Newest

Frequently asked to experienced developers. Recently asked in many US interviews.
 Q1. 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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   Like      Discuss      Correct / Improve     java   database   architecture     MSCI  Vudu  Bank Of America  Sears      expert        frequent


Related Questions

  What is a Deadlock ?
 What are the four situations that are required for deadlock to happen ?
 What is Livelock in relation to deadlock ?
 Write Java code that would cause deadlock ?


 Q2. 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


Related Questions

 What is the difference between Oracle , Cassandra and Redis ?
 What is Apache Cassandra ?
 Is Cassandra read optimized or Write optimized ?
 How different is the Search algorithm when we query Cassandra Tables and When we query Oracle Tables ?
 Can we query Cassandra Tables without specifying the partition id in the where clause ?
 What are the restrictions on querying Cassandra Tables ?
 Which of the following databases - Cassandra / Oracle - provides more flexibility about querying the database ?
 Why was Cassandra written in Java and not C++ ?


 Q3. 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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