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Interview Questions and Answers for 'Veritas' - 12 question(s) found - Order By Newest

Frequently asked in Infosys India
  Q1. What is a String Pool ?Core Java
Ans. String pool (String intern pool) is a special storage area in Java heap. When a string is created and if the string already exists in the pool, the reference of the existing string will be returned, instead of creating a new object and returning its reference.

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   Like         Discuss         Correct / Improve     java   oops   string   string class   string pool   heap memory     Asked in 31 Companies      intermediate        frequent

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Very frequently asked.Usually among first few questions.
  Q2. What is MVC ? Design
Ans. MVC is a Design Pattern that facilititates loose coupling by segregating responsibilities in a Web application

1. Controller receives the requests and handles overall control of the request
2. Model holds majority of the Business logic, and
3. View comprise of the view objects and GUI component

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   Like         Discuss         Correct / Improve     j2ee   mvc   mvc design pattern   design pattern   struts   spring   web application   web frameworks   ebay     Asked in 60 Companies      basic        frequent

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Frequently asked in high end product companies. Frequently asked in Deloitte.
  Q3. How is Hashmap internally implemented in Java ?Core Java
Ans. https://medium.com/javarevisited/internal-working-of-hashmap-in-java-97aeac3c7beb#:~:text=HashMap%20internally%20uses%20HashTable%20implementation,the%20entries%20into%20the%20map.

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   Like         Discuss         Correct / Improve     hashmap  collections  hashmap internal implementation     Asked in 20 Companies      expert        frequent


Frequently asked to fresh graduates.
  Q4. Difference between Process and Thread ?Operating System
Ans. Process is a program in execution whereas thread is a separate path of execution in a program.

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   Like         Discuss         Correct / Improve     java   threads   multi threading   operating system   process vs thread     Asked in 24 Companies      basic        frequent


Very frequently asked. Usually asked with questions related to String. Frequently asked at CTS / Cognizant
  Q5. What is an Immutable Object ?Core Java
Ans. Object that can't be changed after instantiation.

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   Like         Discuss         Correct / Improve     java   oops   immutable  immutability     Asked in 27 Companies      basic        frequent

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 Q6. According to Java Operator precedence, which operator is considered to be with highest precedence?Core Java
Ans. Postfix operators i.e () [] . is at the highest precedence.

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   Like         Discuss         Correct / Improve     java   operators   operator precedence     Asked in 2 Companies


 Q7. How is Abstraction implemented in Java ?Core Java
Ans. Abstraction is provided in Java by following ways -

Coding to the ( Interfaces / Abstract Classes ) or contracts

By Encapsulating details within classes and exposing the minimal Door ( few public methods )

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   Like         Discuss         Correct / Improve     java   oops concepts   abstraction   interfaces   abstract class   encapsulation  object oriented programming (oops)  oops concepts     Asked in 3 Companies      basic        frequent


 Q8. Difference between Virtual Memory and Demand Paging?Operating System
 This question was recently asked at 'Veritas'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     Virtual Memory vs Demand Paging     Asked in 1 Companies


 Q9. Difference between Mutex and Semaphore? Operating System
 This question was recently asked at 'Veritas'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     Mutex vs Semaphore     Asked in 1 Companies


 Q10. Explain process life cycle.Operating System
 This question was recently asked at 'Veritas'.This question is still unanswered. Can you please provide an answer.


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 Q11. What is an Operating system or OS ?Operating System
 This question was recently asked at 'Veritas'.This question is still unanswered. Can you please provide an answer.


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 Q12. What is thrashing?Operating System
 This question was recently asked at 'Veritas'.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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