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

Interview Questions and Answers - Order By Newest

Q1361. Write a SQL to display all duplicate names from Employee Table

SQL

Ans. SELECT * FROM EMPLOYEE A WHERE A.ROW_ID IN (SELECT MAX(ROW_ID) FROM EMPLOYEE b WHERE A.NAME = B.NAME )

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

_{Like Discuss Correct / Improve}

Q1362. Write an SQL to get Employees who are also Managers

SQL

Ans. SELECT A.NAME FROM EMPLOYEE A, EMPLOYEE B WHERE A.ID = B.MANAGER_ID

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

_{Like Discuss Correct / Improve}

Q1363. Which objects are eligible for garbage collection ?

Core Java

Ans. Objects that have lost their reference i.e. they cannot be accessed/used by the program anymore.

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

_{Like Discuss Correct / Improve garbage collection Asked in 1 Companies basic}

Q1364. Which Data structure can be used for creating Queue ?

Data Structure

^{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 queue collections data structure}

Q1365. What is a BlockingQueue ?

Core Java

^{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 queue blockingqueue collections}

Q1366. Which immutable classes have you worked with ? Can you name some immutable Collections ? How to make an immutable collection ?

Core Java

Ans. string and wrapper class objects

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

_{Like Discuss Correct / Improve immutability immutable immutability classes immutable immutability collections Asked in 3 Companies}

Q1367. Which of the two - Arrays or LinkedList - is a better data structure for implementing Queue ? and Why ?

Data Structure

^{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 Arraylist linkedlist queue collections}

Q1368. What are the benefits of immutability or Immutable classes ?

Core Java

Ans. Immutable objects are thread-safe so you will not have any synchronization issues.Immutable objects are good for Map keys and Set elements, since these typically do not change once created.Immutability makes it easier to write, use and reason about the code (class invariant is established once and then unchanged)Immutability makes it easier to parallelize your program as there are no conflicts among objects.The internal state of your program will be consistent even if you have exceptions.References to immutable objects can be cached as they are not going to change.

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

_{Like Discuss Correct / Improve immutable immutability classes benefits of immutable immutability classes Asked in 1 Companies}

Q1369. What is the difference between SDLC and Agile ?

Process

Ans. Here are the differences between Agile and Waterfall Methodology:

The software development process is divided into different phases in the Waterfall model while Agile methodology segregates the project development lifecycle into sprints

Waterfall is a structured software development methodology, and often times can be quite rigid, whereas the Agile methodology is known for its flexibility

According to the Waterfall model, software development is to be completed as one single project, which is then divided into different phases, with each phase appearing only once during the SDLC. However, the Agile methodology can be considered as a collection of many different projects, which are nothing but the iterations of the different phases focusing on improving the overall software quality with feedback from users or the QA team

If you want to use the Waterfall model for software development, then you have to be clear with all the development requirements beforehand as there is no scope of changing the requirements once the project development starts. The Agile methodology, on the other hand, is quite flexible, and allows for changes to be made in the project development requirements even after the initial planning has been completed

All the project development phases such as designing, development, testing, etc. are completed once in the Waterfall model while as part of the Agile methodology, they follow an iterative development approach.

As a result, planning, development, prototyping and other software development phases can appear more than once during the entire SDLC One of the major differences between Agile and Waterfall development methodology is their individual approach towards quality and testing.

In the Waterfall model, the Testing phase comes after the Build phase, but, in the Agile methodology, testing is typically performed concurrently with programming or at least in the same iteration as programming

While Waterfall methodology is an internal process and does not require the participation of customers, the Agile software development approach focuses on customer satisfaction and thus, involves the participation of customers throughout the development phase

The Waterfall model can be regarded as a stringently sequential process, however, the Agile methodology is a highly collaborative software development process, thereby leading to better team input and faster problem solving

The Waterfall model is best suited for projects which have clearly defined requirements and in which change is not expected at all, while Agile development supports a process in which the requirements are expected to change and evolve. Thus, if you are planning to develop a software that would require frequent overhauls and has to keep up with the technology landscape and customer requirements, Agile is the best approach to follow

The Waterfall model exhibits a project mindset and lays its focus strictly on the completion of project development, while Agile introduces a product mindset that focuses on ensuring that the developed product satisfies its end customers, and changes itself as the requisites of customers change

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

_{Like Discuss Correct / Improve sdlc agile adlc vs agile Asked in 3 Companies}

Q1370. What is the difference between Kan Ban and Agile ? Which one do you prefer ?

Process

^{This question was recently asked at 'Ancestry'.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 kanban agile kanban vs agile Asked in 1 Companies}

Q1371. How is LinkedList collection class internally implemented ? Is it a Linked List or Doubly Linked List ?

Core Java

^{This question was recently asked at 'Ancestry'.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 linkedlist internal implementation of linkedlist Asked in 1 Companies}

Q1372. How ConcurrentHashMap provides better performance compared to HashTable ?

Core Java

Ans. ConcurrentHashMap uses multiple buckets to store Data and hence avoid read locks which facilitates better performance.

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

_{Like Discuss Correct / Improve ashTabl expert rare}

Q1373. What are annotations and what are it's advantages ?

Core Java

^{This question was recently asked at 'Tata Consultancy (TCS)'.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}

Q1374. Suppose we have a string "Java is object oriented language" and we have to reverse every alternate word in string. How would we do that using Java program.

Core Java

^{This question was recently asked at 'datalake solutions'.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 string manipulation code coding Asked in 1 Companies}

Q1375. how do you share data between JSP and spring controller using Angular JS ?

AngularJS

Ans. For JPS we can use modelAttribute and ModelAndView object to share data between JPS and Controller. In case of Angular JS, the angular js always get data in form of JSON and it can be accessed by REST WS. So the angular js share data with controller in the form of JSON.

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

_{Like Discuss Correct / Improve angularjs jsp spring controller Asked in 1 Companies}

Q1376. Can we override wait() or notify() ?

Core Java

Ans. No, because these are final.

public final void wait() throws InterruptedException

public final void notify()

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

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

Q1377. Why did you choose programming ?

General

^{This question was recently asked at 'HCSS'.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}

Q1378. A Kid can go up 1, 2 or 3 stairs in one step. Write a method that takes number of steps in a stair will print all possible ways he can take.

For example , printAllCombinations(3) should print

111
12
21
3

Similarly , printAllCombinations(4) should print

1111
121
13
211
22
31
4

Core Java

Ans. public static String findStep(int n) {
if (n == 1 || n == 0)
return 1;
else if (n == 2)
return 2;
else
return findStep(n - 3) + findStep(n - 2) + findStep(n - 1);
}

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

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

Q1379. Write a method that takes an integer and verifies if the number is power of 10.

Core Java

Ans. public static boolean isPowerOfTen(long input) {

if (input % 10 != 0 || input == 0) {
return false;
}

if (input == 10) {
return true;
}

return isPowerOfTen(input/10);
}

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

_{Like Discuss Correct / Improve check if number is power of 10 in java Asked in 1 Companies}

Q1380. What is the default data type of state variables in Clonable interface and Serializable interface ?

Core Java

Ans. Cloneable and Serializable are Marker Interfaces, So these are empty interfaces with no variables.

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

_{Like Discuss Correct / Improve cloneable serializable static variables Asked in 1 Companies}

Q1381. Can you write the code for implementing the one to many (student -> courses) relationship in hibernate?

Hibernate

Ans. @OneToMany(cascade = CascadeType.ALL)
@JoinColumn(name = "student_id")
private Set countries;

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

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

Q1382. Can you explain software design principles cohesion and coupling with an example?

Design

^{This question was recently asked at 'Fidelity Information Services (FIS)'.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 cohesion coupling Asked in 1 Companies frequent}

Q1383. In singleton Pattern framework, Web application deployed on multiple cluster server will have how many objects?

Design

^{This question was recently asked at 'Pandora'.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 singleton Asked in 1 Companies}

Q1384. Does relational database facilitate read or write optimization while storing information ?

database

Ans. Usually Relational Databases are optimized for writing. Some exception being usage of indices where indices needs to be updated after insertion and eventually helps with Log(n) reading time.

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

_{Like Discuss Correct / Improve read optimization rdbms relational database}

Q1385. In a file there are 1 million words . Find 10 most frequent words in that file.

Design

^{This question was recently asked at 'Amazon'.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 file handling Asked in 1 Companies}

Q1386. How can i split a linked list in two parts in java 8?

Core Java

Ans. This can be done using a Spliterator.

LinkedList list = Arrays.asList("names","numbs","birds","animals");
Spliterator split1 = list.Spliterator();
Spliterator split2 = split1.Spliterator();

Now, the LinkedList is split into split1 and split2.
use split2 first then split1 to check the output.

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

_{Like Discuss Correct / Improve java 8 parallel stream spliterator Asked in 1 Companies}

Q1387. how does abstraction help your application ?

Core Java

^{This question was recently asked at 'Intel'.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 abstraction oops concepts Asked in 1 Companies basic}

Q1388. Explain OOps concepts.

Core Java

Ans. There are four main OOP concepts in Java. These are:

Abstraction. Abstraction means using simple things to represent complexity. We all know how to turn the TV on, but we don?t need to know how it works in order to enjoy it. In Java, abstraction means simple things like objects, classes, and variables represent more complex underlying code and data. This is important because it lets avoid repeating the same work multiple times.

Encapsulation. This is the practice of keeping fields within a class private, then providing access to them via public methods. It?s a protective barrier that keeps the data and code safe within the class itself. This way, we can re-use objects like code components or variables without allowing open access to the data system-wide.

Inheritance. This is a special feature of Object Oriented Programming in Java. It lets programmers create new classes that share some of the attributes of existing classes. This lets us build on previous work without reinventing the wheel.

Polymorphism. This Java OOP concept lets programmers use the same word to mean different things in different contexts. One form of polymorphism in Java is method overloading. That?s when different meanings are implied by the code itself. The other form is method overriding. That?s when the different meanings are implied by the values of the supplied variables. See more on this below.

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

_{Like Discuss Correct / Improve oops oops concepts Asked in 16 Companies basic frequent}

Frequently asked in Genpact.

Q1389. What is object cloning ?

Core Java

Ans. Its is the process of creating exact copy of an object being cloned. In Object class one native method called clone() is there which is meant for Shallow Cloning of Object. Shallow cloning means bitwise copy of an object.In case of primitive data type it will create an exact copy of primitive values as well as variables but if the object contains any reference of an object then it will not copy the referenced object rather it will create the copy of reference variable and assigned it to the old object.

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

_{Like Discuss Correct / Improve cloning Asked in 3 Companies basic frequent}

Q1390. How to configure Tomcat to have number of user restrictions?

Server

^{This question was recently asked at 'Accolite'.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 omca Asked in 1 Companies}

Search Interview Questions

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