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Java ee - Interview Questions and Answers for 'Abs' - 1 question(s) found - Order By Newest

  Q1. What is a cookie ?Java EE
Ans. A cookie is a small piece of text stored on a user's computer by the browser for a specific domain. Commonly used for authentication, storing site preferences, and server session identification.

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   Like         Discuss         Correct / Improve     cookie   javascript   web application   session management   browser   j2ee     Asked in 16 Companies      basic        frequent


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 Q2. Which method needs to be implemented if a class is implementing comparable interface ?Core Java
a. comp
b. compare
c. compareTo
d. compareEquals

Ans.c. compareTo

 Q3. What is Dirty Read in Database Transactions ?Database
a. Data Read by Transaction 2 which hasn't yet updated by Transaction 1
b. Data Read by Transaction 2 which has been updated and commited by Transaction 1
c. Data Read by Transaction 2 which has been updated but not commited by Transaction 1
d. Inability of Transaction 2 to read Data when Transaction 1 is updating.

Ans.c. Data Read by Transaction 2 which has been updated but not commited by Transaction 1

 Q4. Which of the following is not true for abstract classes ?Core Java
a. Abstract Class is only meant to be sub classed and not supposed to be instantiated.
b. Abstract class handlers can be used to handle derived class objects.
c. We can't have an abstract class without abstract methods.
d. Abstract class has member elements.

Ans.c. We can't have an abstract class without abstract methods.

 Q5. Which of the following class creates immutable objects ?Core Java
a. String
b. StringBuffer
c. StringBuilder
d. None of these create immutable objects.

Ans.a. String

 Q6. Which of the following can be declared abstract ?Core Java
a. static methods
b. instance methods
c. static variable
d. instance variables

Ans.b. instance methods

 Q7. In majority of the cases, the following join will give maximum number of results ?Database
a. Inner Join
b. Outer Join
c. Left Join
d. Right Join

Ans.b. Outer Join

 Q8. Which if the following is true for SQL Joins ?Database
a. Left Join and Right Join gives equal number of Results
b. Outer Join and Inner Join gives equal number of Results
c. Inner Join gives maximum number of results records
d. Inner Join gives minimum number of result records

Ans.d. Inner Join gives minimum number of result records

 Q9. Which of the following is not true for Prepared Statements ?Database
a. Prepared Statements provides better performance
b. Prepared Statements prevent SQL Injection attacks
c. Prepared Statements provide ORM capabilities
d. Prepared Statement provides DB side caching

Ans.c. Prepared Statements provide ORM capabilities


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