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Core Java - Interview Questions and Answers for 'Package' - 6 question(s) found - Order By Newest

 Q1. What is a package and what are its advantages ?Core Java
Ans. Package is a namespace that organizes a set of related classes.

Advantages of Packages

1. Better Organization of classes.
2. Saves from the problem of duplicate names as duplicate class names are allowed across different packages.

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   Like         Discuss         Correct / Improve     package  advantages of packages     Asked in 1 Companies      Basic


 Q2. Is it a good practice to use Asterick(*) in import statement to load multiple packages with single import statement ?Core Java
Ans. No, we should be lean in loading only packages which are required. Loading packages which are not being used result in memory overheads.

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   Like         Discuss         Correct / Improve     import  import packages     Asked in 1 Companies


 Q3. Do we need to import java.lang package ?Core Java
Ans. No, It is loaded by default by the JVM.

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   Like         Discuss         Correct / Improve     java   jvm   java.lang.package   yes-no


 Q4. What is a Cursor ?Database
Ans. It's a facility that allows traversal over the records pulled from a table or combination of tables. Its like iterator in Java.

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   Like         Discuss         Correct / Improve     databases   sql   cursors   packages     Asked in 5 Companies      basic        frequent


 Q5. Does importing a package imports all its sub packages too ?Core Java
Ans. No, but we can use wild card (*) to do so

For example -

import java.util.*

will import all packages with name starting with java.util

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   Like         Discuss         Correct / Improve     package   import packages     Asked in 1 Companies      basic


 Q6. What is RPM ?Tool
Ans. Redhat Packaging system or rpm is a Package Manager or type of Package Management system extensively used for Linux systems.

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   Like         Discuss         Correct / Improve     rpm  package management


 Q7. Which of the following wildcard is used to import multiple packages at once ?Core Java
a. .
b. ?
c. *
d. &

Ans.c. *


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