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Interview Questions and Answers for 'Io' - 843 question(s) found - Order By Rating

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 Q1. Is it safe to use session storage ?Javascript
Ans. Session storage can be accessed from XSS (Cross site Scripting) attacks but cookies (if set with "HttpOnly" and "Secure" flags) are more safer against these attacks.

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   Like         Discuss         Correct / Improve     session storage  security


 Q2. Do you ever merge changes from one feature branch to another ? Why ?SCM
 This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     SCM  Source Code Management  Configuration Control  Git  Svn


 Q3. Can we do a thread specific heap allocation ?Memory Management
 This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     memory management  heap memory   heap allocation      expert


 Q4. Can you share some of the best practices while designing authentication and authorization system ?Authentication
 This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     best practices


 Q5. What are the different methods for the authentication of Google Compute Engine API ?Google Cloud Platform (GCP)
Ans. MS active directory concept and in GCP its Cloud Identity

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   Like         Discuss         Correct / Improve     Google Compute Engine API  GCP Authentication


 Q6. Have you ever used sessionStorage ? What is the better way to store session information - sessionStorage or session cookie ?Session Management
Ans. Session Cookie, because session storage can be accessed from XSS (Cross site Scripting) attacks but cookies (if set with "HttpOnly" and "Secure" flags) are more safer against these attacks.

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   Like         Discuss         Correct / Improve     SessionStorage  session cookie  session management  javascript


 Q7. Have you ever had any problem with asynchronous programming due to race condition ?Angular
 This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     race condition


 Q8. What are the limitations with using interpolation ? Why do we need property binding ?
Ans. Interpolation can only work with String types and hence we need property binding while working with other data types.

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   Like         Discuss         Correct / Improve     interpolation  property binding


 Q9. Can we use interpolation with all data types ?
 This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     interpolation


 Q10. What is interpolation in Angular ?Angular
 This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     interpolation


 Q11. What are the different conditions that triggers view update in case of push ChangeDetectionStrategy ?Angular
Ans. 1. Any change in Input
2. Any even originating from the component or it's child components
3. Explicit trigger

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   Like         Discuss         Correct / Improve     ChangeDetectionStrategy


 Q12. Which change detection strategy do you use in your application and Why ?Angular
Ans. We use ChangeDetectionStrategy.Push

As the application grows bigger , The default change detection strategy could become a performance overhead and hence should be avoided.

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   Like         Discuss         Correct / Improve     ChangeDetectionStrategy     Asked in 1 Companies


 Q13. What is concurrent interface ?Core Java
Ans. ConcurrentMap is an interface and it is a member of the Java Collections Framework. It represents a Map that is capable of handling concurrent access to it without affecting the consistency of entries in a map. ConcurrentMap interface present in java.util.concurrent package.

HashMap operations are not synchronized, while Hashtable provides synchronization. Though Hashtable is thread-safe, it is not very efficient. To solve this issue, the Java Collections Framework introduced ConcurrentMap in Java 1.5.

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   Like         Discuss         Correct / Improve     Concurrent Interface   java.util.concurrent   Java 8 Concurrency   java concurrency   java 8     Asked in 1 Companies


 Q14. How dependency injection in angular helps with loose coupling in angular ?Angular
 This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     Dependency injection


 Q15. What is the different between collection and Stream Api ?Core Java
Ans. data under collection are actually stored in memory so that they can be retrieved when needed whereas data in streams are not stored and hence we need to construct it again when needed.

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   Like         Discuss         Correct / Improve     collection classes  stream api  collection vs stream     Asked in 1 Companies


 Q16. How to debug multi server deployed application ?Debugging
Ans. Choose the server from the list of defined servers under J2EE Server.
Choose the project to debug.
Click Apply to save changes.
Click Debug to start the server and run the application.

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   Like         Discuss         Correct / Improve     debugging  debugging multi server application     Asked in 1 Companies


 Q17. What is the difference between method and function in Typescript ?TypeScript
Ans. Method belongs to a class whereas function isn't. So the only difference is the scope in which they are defined.

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   Like         Discuss         Correct / Improve     method vs function in typescript


 Q18. Interface vs AbstractionCore Java
 This question was recently asked at 'Oracle financial services'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     interface vs abstraction  interfacing vs abstraction  relation between interface and abstraction  How interface provide abstraction     Asked in 1 Companies


 Q19. What is arrow function in Typescript ? TypeScript
 This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     arraow functions in typescript   lambda expression vs arrow function


 Q20. How do you evaluate a product while migrating to open source ?
 This question was recently asked at 'Royal Bank of Scotland (RBS),RBS India'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     open source  open source migration     Asked in 2 Companies


 Q21. How can we create an arraylist of unique values ?Core Java
Ans. We can put the value in a set to enforce uniqueness and then dum those value into an arraylist.

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   Like         Discuss         Correct / Improve     arraylist  design  collections


 Q22. Have you ever heard about csrf attacks ?Security
Ans. Yes, Cross-Site Request Forgery (CSRF) is an attack that forces an end user to execute unwanted actions on a web application in which they're currently authenticated.

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   Like         Discuss         Correct / Improve     csrf attack  Cross-Site Request Forgery (CSRF)     Asked in 16 Companies


 Q23. What are the advantages and disadvantages of Lambda Expression ?Core Java
 This question was recently asked at 'Number 8'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     java8  java 8  java lambda expressions     Asked in 1 Companies


 Q24. Write a program to make an array act as a set.Core Java
Ans. public Set convertArrayToList(T array[]) {
Set set = new HashSet<>(Arrays.asList(array));
return set;
}

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   Like         Discuss         Correct / Improve     arrays  collections set     Asked in 1 Companies


 Q25. how would you build application stack using Cloud Formation ?
Amazon Web Services (AWS)
Ans. Open the AWS CloudFormation console at https://console.aws.amazon.com/cloudformation . Create a new stack by using one of the following options: Choose Create Stack. This is the only option if you have a currently running stack.

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   Like         Discuss         Correct / Improve     aws cloud formation     Asked in 1 Companies


 Q26. Explain AWS IAM.Amazon Web Services (AWS)
Ans. AWS Identity And Access Management (IAM) is a webservice provided by AWS platform that provides access control capabilities (authentication and authorization) to AWS resources.

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   Like         Discuss         Correct / Improve     aws iam     Asked in 1 Companies


 Q27. Why would a cloud customer use resources in multiple regions and zones ?Cloud Computing
Ans. 1. Fault Tolerance
2. Better Access by bringing the application closer to the users.

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   Like         Discuss         Correct / Improve     Google Cloud Computing (GCP)  Amazon Web Services (AWS)  Availability Zones  Regions and Zones  Infrastructure


 Q28. 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.

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   Like         Discuss         Correct / Improve     Junit exception testing


 Q29. Can we check two html radio buttons together ?Html
 This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     html radio


 Q30. 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.


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   Like         Discuss         Correct / Improve          Asked in 1 Companies


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