Interview Questions and Answers - Order By Newest Q3231. What are different types of Polymorphism in Java ? Core Java
Ans. run time polymorphism
compile time polymorphism Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve   Asked in 1 Companies Q3232. Is String mutable or immutable in Java ? Core Java
Ans. String is Immutable because of String Constant Pool. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve   Asked in 1 Companies This question was recently asked at 'Whitesnow Software'.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   Asked in 1 Companies Q3234. Should we do anything to avoid memory leaks in Java ? Core Java
Ans. Java has a intrinsic way of checking leaks and reclaiming memory called garbage collection. Moreover Java doesn't support pointer arithmetics , so there is very low comparative chance of memory leaks, compared to C,C++
Though there may be tools that may audit code to make sure that we are not leaving much for the garbage collection to work but I have never heard anyone doing anything for memory leaks in Java. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve  memory leak in java Q3235. Write a Program to draw a fish ? Core Java
This question was recently asked at 'Webkul Software'.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   Asked in 1 Companies This question was recently asked at 'Cognizant (CTS), Advanced Micro Instruments'.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  aws ami Asked in 2 Companies This question was recently asked at 'IBM'.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  aws route 53 Asked in 1 Companies Q3238. Can you explain integration between Spring and Hibernate ? Hibernate
This question was recently asked at 'HCL Technologies'.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  Spring framework  Hibernate Orm Asked in 1 Companies Ans. Virtual machines are IAAS in GCP which can called Compute Engine Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve  Google cloud Platform  GCPAns. IAM is used to define the level of access to GCP services Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve  GCP Q3241. Why would you use XML over JSON when using ajax ? JSON
This question was recently asked at 'SoftLayer'.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  xml  ajax  json Asked in 1 Companies Q3242. What is the difference between inheritance in PHP vs. Javascript? JavaScript
This question was recently asked at 'WePay'.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  php  javascript Asked in 1 Companies Q3243. Write a method to track every click on a page. JavaScript
This question was recently asked at 'LinkedIn'.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   Asked in 1 Companies Q3244. Have you had to work with memory leak problems in javascript ? JavaScript
This question was recently asked at 'RockYou'.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   Asked in 1 Companies Q3245. Create a component and sort the data to show specific information. React JS
This question was recently asked at 'Egen Solutions'.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   Asked in 1 Companies Q3246. prototypal inheritance in Javascript JavaScript
This question was recently asked at 'RocketMiles'.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   Asked in 1 Companies Q3247. CSS Box Model CSS
This question was recently asked at 'RocketMiles'.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   Asked in 1 Companies Q3248. Develop an address form in React js. React JS
This question was recently asked at 'PayPal'.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   Asked in 1 Companies Q3249. Difference between Span and Div ? Html
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  html span  html div Q3250. Can we check two html radio buttons together ? Html
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  html radio Q3251. What is the advantage of moving text messages to a separate properties file , like message.properties instead of hard defining it on the html ? Design
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   Q3252. What is the use of defining equals , compareTo and hashcode methods in a class ? Where are they used ? Core Java
Ans. equals, compareTo and hashcode are of use when the objects are used within collections.
Equals helps with collections that helps maintaining only unique objects ( like Set )
compare and compareTo helps with collections that helps maintaining objects in order ( TreeSet, TreeMap etc )
hascode helps with collections that facilitates hash searching ( like hashSet, hashMap etc ) Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve  equals   compareTo   hashcode method Q3253. Can we pass the junit test if the tested method throws the exception ? and Should we do that ? Junit
Ans. Yes, We can pass the test even if the tested method throws an exception.
One way is know as exception testing in which the tested method is expected to throw exception and hence the expectation is set accordingly.
@Test(expected = IndexOutOfBoundsException.class)
public void test(){}
Other way is to just ignore if the tested code throws an exception. In that case , we can enclose the tested method call in the try block and within exception block, we just return gracefully.
Exception testing is perfectly ok to be done as we would like test code in case an exception occurs and if the code is handling the exception properly. Ignoring the exception by putting the tested method call within try block isn't something normal and should be avoided. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve  Junit exception testingAns. Cloud computing helps saving overall cost for infrastructure and service usage through following -
1. On demand Services and elasticity - You only pay for what you use. Less Ideal time.
2. Resource Pooling
3. Self Service - Less involvement of human resources Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve  Google Cloud Platform (GCP)  Amazon Web Service (AWS Q3255. What is the difference between Co Location, Virtualization and Serverless ? Infrastructure
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   Q3256. Which category of service , Google Search and Drive belongs to ? SAAS
Ans. They are SAAS ( Software as a Service ) Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve  saasAns. They are IAAS ( Infrastructure as a service ) Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve  iaas  aws ec2  aws s3Ans. It's Serverless and PAAS ( Platform as a service ) Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve  paas  serverlessAns. Compute
Network
Storage
Big Data
Machine Learning Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve  Ans. Alerts only let customer knows of any excessive usage whereas Quota restricts the usage beyond a certain point. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve  GCP Billing