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Q2281. Can we build an application that where few functions gets executed as a cron as well as services. How ?

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Q2282. What are different in memory data structures that are used in No Sql Database ?

NoSql Database

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Q2283. What are different types of No Sql Databases ?

NoSql

Ans. graph based
column based
document based

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Q2284. How would you choose your favorite company name for e.g. three companies are given in radio buttons Infosys, TCS and Aricent. Do You need to loop trough all radio buttons and select your favorite company or can just get the selected value.

Javascript

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Q2285. Write code to get count of every 5 letter word in a string using lambda expression

Core Java

Ans. String str = "I had been saying that he had been there";

Map<String,Long> countWords = Arrays.asList(str.split(" ")).stream().filter(p->p.length() = 5).collect(Collectors.groupingBy(p->p,Collectors.counting()));

System.out.println(countWords);

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Q2286. Can you write code so that we can keep track of Keys that have their values changed along with the number of times they were changed.

Core Java

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Q2287. How are hash codes generated ?

Data Structure

Ans. Use hashCode() which returns an integer value, generated by a hashing algorithm

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Q2288. What are the different types of methods in Java ?

Core Java

Ans. Static Methods
Instance Methods
Accessor / Mutator or getter setters

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Q2289. Are getters setter / accessor mutator methods instance methods or static methods ? why ?

Core Java

Ans. They are usually instance methods. They are usually applied to DAOs / DTOs / POJO that are used to transport objects and used to access object elements. As they are tied to objects and are not common to all objects of a class, hence they are created as non static.

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Q2290. Design a class that find all files with SSN.

Core Java

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Q2291. Describe inheritance and polymorphism and their importance for OOP.

Core Java

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Q2292. What is the difference between instantiation and initialization ?

Core Java

Ans. Instantiation is the process of reserving memory for the object

For ex -

List list = new ArrayList();

Initialization is the process of setting the default value for the object or default object construction.

List list = new ArrayList(set);

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Q2293. Why do we need to close the Scanner ?

Core Java

Ans. For releasing input stream reference (System.in), you should close scanner.

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Q2294. Difference between Arrays and LinkedList ?

Data Structure

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Q2295. How can we make sure that only one object of a class get's created ?

Design

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Q2296. Explain your experience working on UI ? Have you worked with JSF ?

General

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Q2297. Have you faced any problem integrating software / services with any of your partners or vendors ?

General

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Q2298. Can we capture the Request body within the interceptor or Filter and perform operations on it ?

Spring

Ans. Yes, But with interceptor it will remove the body from the request and then we will have to explicitly add the attributes to the session to forward it to the handler.

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Q2299. Have you ever faced challenged with your current work ?

general

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Q2300. Which of the following - arrays or LinkedList allow elements to be accessed using index and how ?

Data Structure

Ans. Arrays allows elements to be accessed directly using the index.

As Array elements are stored in continuous memory locations it's very easy to find the memory address of any element using the formula as following

Memory Address of Array start or index 0 + ( Size of array element * Index )

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Q2301. Can we access elements at a particular index using LinkedList collection class ?

Ans. Yes we can. But as the underlying structure of the collection class is double linked list, it will eventually have to traverse to the element linearlly and hence would result in bad performance.

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Q2302. Can we access elements at a particular index using LinkedList collection class ?

Data Structure

Ans. Yes we can. But as the underlying structure of the collection class is double linked list, it will eventually have to traverse to the element linearlly and hence would result in bad performance.

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Q2303. Can you give an example of a Get and Post Request.

Web Service

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Q2304. Can you design a program that can identify if two shapes on x and y plane would intersect ?

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Q2305. How can we identify if we circle on a xy place would intersect ?

Ans. If the sum of their radius is greater than the shortest distance between them, then they will intersect.

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Q2306. How can we identify if two squares ( given their diagonal coordinates ) would intersect on xy plane ?

Ans. Using the diagonal coordinates we can easily calculate the other 2 coordinates using Pythagoras.

Any 2 rectangles or squares will intersect if any coordinate of one square would lie within the boundary of another one. A point x,y will be inside the square ( x1,y1;x2,y1;x1,y2;x2,y2 ) is x is between x1 and y2 and y is between y1 and y2.

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Q2307. Explain CAP Theorem.

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Q2308. Have you heard of Rest method Patch ?

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Q2309. Do you think we should have security Tokens in Url ?

Design

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Q2310. What information should be sent in url vs sent within the body in case of Post request ?

Design

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