Interview Questions and Answers for 'L' | Search Interview Question

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Q1091. Where do you see yourself in next 5 years?

Ans. Sample Answers -

Getting better with upcoming technologies and be a Lead developer.

In accordance with the company, working as a permenant employee.

Be an associate architect.

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_{Like Discuss Correct / Improve Asked in 2 Companies}

Q1092. What are the daily activities of build and release engineer ?

^{This question was recently asked at 'greeteck infosolutions'.This question is still unanswered. Can you please provide an answer.}

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_{Like Discuss Correct / Improve build and release Asked in 1 Companies}

Q1093. What does the following exception means

org.hibernate.LazyInitializationException: could not initialize proxy - no Session

Hibernate

Ans. The error states that Hibernate is not able to initialize proxy / dependent entity objects as there is no session or transaction present. Very likely we are trying to load the dependent entities lazily but the call to dependent object property is not wrapped within the session or transaction.

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_{Like Discuss Correct / Improve Lazy Loading Lazy Initialization org.hibernate.LazyInitializationException}

Q1094. If you are given choice to avoid LazyInitializationException using any of the following measures, which are the ones you will choose and why ?

1. Set lazy=false in the hibernate config file.
2. Set @Basic(fetch=FetchType.EAGER) at the mapping.
3. Make sure that we are accessing the dependent objects before closing the session.
4. Force initialization using Hibernate.initialize

Hibernate

Ans. First resolution is a big No as it conveys no lazy loading in complete app. even second is advocating the same but for a particular mapping.

third one is most appropriate if loading and dependent entity property access is closer to each other in code and can be accomplished.

I don't mind using 4th too.

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_{Like Discuss Correct / Improve lazy loading lazy initialization LazyInitializationException}

Q1095. Is it advisable to keep session or transaction open for long time just to avoid LazyInitializationException ?

Hibernate

Ans. No. It's a resource and performance overhead.

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_{Like Discuss Correct / Improve LazyInitializationException Lazy Loading}

Q1096. How to create list that will sort it's elements dynamically?

Algorithm

Ans. Override the behavior of collection class to sort the list upon each element addition. Though it's not recommended as list are sorting heavy data structures.

List<MyType> list = new ArrayList<MyType>() {
public boolean add(MyType mt) {
super.add(mt);
Collections.sort(list, comparator);
return true;
}
};

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_{Like Discuss Correct / Improve Asked in 1 Companies intermediate}

Q1097. What is an execution engine within JVM ?

Core Java

Ans. Execution engine contains interpreter and JIT compiler, which covert byte code into machine code.

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_{Like Discuss Correct / Improve jvm execution engine compiler Asked in 1 Companies}

Q1098. Write program to create a linked list and perform different operations on it.

Algorithm

Ans. import java.util.*;
class LinkedListSolution{
protected LinkedList list;
public LinkedListSolution(){
list = new LinkedList();
}
public Object pop() throws NoSuchElementException{
if(list.isEmpty())
throw new NoSuchElementException();
else
return list.removeFirst();
}
public void push(Object obj){
list.addFirst(obj);
}
public Object peek() throws NoSuchElementException{
if(list.isEmpty())
throw new NoSuchElementException();
else
return list.getFirst();
}
public boolean isEmpty(){
return list.isEmpty();
}
public String toString(){
return list.toString();
}
}
class TestStack{
public static void main(String args[]){
LinkedListSolution s = new LinkedListSolution();
s.push("First");
s.push("Second");
s.push("Third");
System.out.println("Top: " s.peek());
s.push("Fourth");
while(!(s.isEmpty()))
System.out.println(s.pop());
}
}

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_{Like Discuss Correct / Improve Linkedlist data structures algorithm Asked in 2 Companies basic}

Q1099. write program to do matrix multiplication

Core Java

^{This question was recently asked at 'Kony Labs'.This question is still unanswered. Can you please provide an answer.}

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Q1100. Can the foreign key column have null values ?

Database

^{This question was recently asked at 'Volkswagen It services'.This question is still unanswered. Can you please provide an answer.}

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Q1101. How do threads share information ?

Core Java

Ans. Through common memory area.

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_{Like Discuss Correct / Improve threads Asked in 1 Companies}

Q1102. What is ACL ?

Operating System

Ans. Access Control List or ACL is the list of permissions attached to an object in the File System.

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_{Like Discuss Correct / Improve acl file system file security object security operating system}

Q1103. Write a Program to delete a node from Linked List ?

Data Structure

^{This question was recently asked at 'Caprus IT'.This question is still unanswered. Can you please provide an answer.}

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_{Like Discuss Correct / Improve linkedlist delete a node from linked list Asked in 1 Companies}

Q1104. What is the difference between TimeBasedRollingPolicy and SizeBasedTriggeringPolicy within Log4j ? Can we use both together and What would that mean ?

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