Interview Questions and Answers for 'C' | Search Interview Question - javasearch.buggybread.com
Javasearch.buggybread.com

Search Interview Questions


 More than 3000 questions in repository.
 There are more than 900 unanswered questions.
Click here and help us by providing the answer.
 Have a video suggestion.
Click Correct / Improve and please let us know.
Label / Company      Label / Company / Text

   



Interview Questions and Answers - Order By Rating

   next 30
 Q1741. What is an IO Filter ?Core Java
Ans. It's an object that reads from one stream and writes to another.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java io  io filter      intermediate

 Q1742. What is the difference between the Reader/Writer java.io hierarchy and the Stream class hierarchy?Core Java
Ans. The Reader/Writer hierarchy is character oriented, whereas the Stream class hierarchy is byte oriented.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java io  streams      intermediate

 Q1743. What kind of thread is garbage collection thread ?Core Java
Ans. Daemon thread

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     garbage collection      intermediate
Try 2 Question(s) Test

 Q1744. What is nested interface?Core Java
Ans. Interface that is declared inside the interface or class, is known as nested interface. It is static by default.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     interface  nested interface      intermediate
Try 1 Question(s) Test

 Q1745. Who invokes a thread's run method ?Core Java
Ans. After a thread is started using a call to start method, JVM invokes the thread’s run method when the thread is initially executed.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     threads  thread run method     Asked in 1 Companies

 Q1746. Is exit a keyword in Java ?Core Java
Ans. No exit is a method to exit execution of a program.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     exit  keywords  exit a program     Asked in 1 Companies

 Q1747. Is delete a keyword in Java ?Core Java
Ans. No, delete is not a keyword in Java. Destruction of objects is taken care by Java Garbage Collection mechanism.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     delete  keywords     Asked in 1 Companies

 Q1748. How does Java handle integer overflows and underflows?Core Java
Ans. It uses those low order bytes of the result that can fit into the size of the type allowed by the operation.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     integer  data types     Asked in 1 Companies        rare

 Q1749. What are the different ways to handle an exception ?Core Java
Ans. 1. Wrap the desired code in try block followed by a catch / finally to catch the exception

2. Declare the throws clause with exceptions that the code is expected to throw as an indication to the calling method to take care of it.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     exception handling     Asked in 4 Companies
Try 1 Question(s) Test

 Q1750. Is there a way to know size of an object in Java ?Core Java
Ans. No, Java doesn't have a sizeOf operator. In C / C++ , its required to determine how much memory allocation is required which is not the case with Java. Java handles memory allocation and deallocation intrinsically.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     sizeOf  size of object  sizeOf operator     Asked in 1 Companies        rare

 Q1751. Can we declare static variables as transient ?Core Java
Ans. It's weird that compiler doesn't complain if we declare transient with static variable because it makes no sense. At least a warning message saying "transient is useless in this situation" would have helped with code cleaning.

Static variables are never serialized and transient is an indication that the specified variable shouldn't be serialized so its kind of double enforcement not to serialize.

It could be that as it makes no different to the variable behavior and hence using both keywords with a variable are permitted.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     static  transient  serialization     Asked in 1 Companies      expert        rare
Try 1 Question(s) Test

 Q1752. Which elements of a class are ignored during serialization ?Core Java
Ans. 1. Objects are serialized and not classes and hence Static variables are ignored.

2. Transient is an explicit declaration to ignore the variable during serialization and hence transient instance variables are ignored too.

3. Base class instance variables if the base class hasn't been declared serializable.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     serialization     Asked in 1 Companies      intermediate        frequent
Try 1 Question(s) Test

 Q1753. What is the default value of a declared object reference ?Core Java
Ans. Null

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     object reference  null     Asked in 1 Companies      basic

 Q1754. 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.

 Help us improve. Please let us know the company, where you were asked this question :   

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

 Q1755. 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

 Help us improve. Please let us know the company, where you were asked this question :   

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

 Q1756. Can we have multiple main methods in a single class ?Core Java
Ans. We can overload the main method by specifying different argument types. For example -

2 main methods with different arguments is perfectly legal

public static void main();
public static void main(String[] args);

The following are not legal as compiler will complain of duplicate methods

public static void main(String[] args);
public static void main(String[] args);

Even The following are not legal as we cannot overload on return types

public static String main(String[] args);
public static void main(String[] args);

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     main method     Asked in 2 Companies

 Q1757. Can an application have multiple main methods within different classes ? If yes, How will the app decide which one to be executed ?Core Java
Ans. Yes we can have a main method with string[] argument in every class of an application. When we execute an app we specify the starting point i.e the class that will get the control first and hence main method of that class gets executed.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     main method     Asked in 3 Companies

 Q1758. Which environment variables do we need to set in order to run Java programs?Core Java
Ans. PATH, CLASSPATH and JAVA_HOME

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     environment variables  path  classpath  java_home     Asked in 3 Companies      basic        frequent

 Q1759. Explain various Searching and Sorting Algorithms ?Algorithm
 This question was recently asked at 'HeadStrong,ServiceNow'.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     Search Algorithm  Sorting Algorithm     Asked in 2 Companies      basic        frequent

 Q1760. Is it mandatory to have a default constructor ?Core Java
Ans. No.

Default constructor is provided by compiler if no constructor is provided ( argument or no argument ) by us.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     constructor  default constructor     Asked in 1 Companies
Try 1 Question(s) Test

 Q1761. Scale yourself on Java on the scale of 1 to 10General
Ans. [Open Ended Answer]

The objective of the question is to check how efficient one is in the language so that appropriate level questions are asked. Don't tell too high number if you are being interviewed for a junior or mid level position as the interviewer may throw advance level questions.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve          Asked in 17 Companies

 Q1762. Trim a string without using String library methodCore Java
 This question was recently asked at 'Ariba'.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     code  coding.string  trim a string     Asked in 1 Companies

 Q1763. Design an app to find 10 most visited urlsCore Java
 This question was recently asked at 'Wayfair'.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

 Q1764. Is there any relationship between Web.xml and Spring.xml ?Spring
Ans. No, there is no relationship between web.xml and spring.xml but you have to configure spring.xml in web.xml in order initialize beans when application starts up

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     spring  web.xml  spring.xml  deployment descriptor     Asked in 1 Companies

 Q1765. Will finally run if we have return statement and it exits the method early ?Core Java
Ans. finally will execute in all graceful situations - graceful executions as well as graceful exceptions. The only situation when finally block won't execute is when the app is abruptly stopped, killed or unplugged.

  Sample Code for finally

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     finally      Intermediate

Very frequently asked. Usually asked in this format or as difference with interfaces / concrete classes.
  Q1766. What is an abstract class ?Core Java
Ans. Abstract class is the class that is not supposed to be instantiated. The purpose of the class to only have extension to the derived class.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     abstract class     Asked in 6 Companies      basic        frequent

 Q1767. What will be the output of following code

public class BuggyBread {
   static class A {
      A() {
         f();
      }

      public void f() {
         System.out.println("A ctor");
      }
   }

   static class B extends A {
      B() {
         f();
      }

      public void f() {
         System.out.println("B ctor");
      }
   }

   public static void main(String[] args) {
      B b = new B();
      b.f();
      A a = new A();
      a.f();
   }
}		Core Java
Ans. B ctor
B ctor
B ctor
A ctor
A ctor

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve          Asked in 1 Companies

 Q1768. Can constructor be synchronized in Java ?Core Java
Ans. No, constructors can not be synchronized in Java. In fact using the keyword synchronized with a constructor results in compilation error.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve          Asked in 1 Companies      expert

 Q1769. Can a constructor throw an exception ?Core Java
Ans. Yes

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve          Asked in 1 Companies

 Q1770. Explain your experience with Java, spring and web services?General
Ans. Have worked on Java 7 and Java 8, In Java 8 , Worked with streams , lambda expression and default methods.

Have worked on both Spring Mvc and Spring Boot, using Spring dependency injection, Rest services , AOP , JDBC and Hibernate integration.

Have worked on Rest services using Spring and Spring Boot. Have worked on SOAP web services too.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     spring  web services     Asked in 1 Companies

previous 30   next 30

Help us and Others Improve. Please let us know the questions asked in any of your previous interview.

Any input from you will be highly appreciated and It will unlock the application for 10 more requests.

Company Name:
Questions Asked: