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Interview Questions and Answers

Q331. Have you heard of reactive extensions ?

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Q332. What is a lapsed listener problem ?

Design

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Q333. How observer pattern can introduce memory leaks ?

Design

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Q334. What can we do if we need to retrieve Fibonacci value at a particular index faster ? Can we use Linked List ?

Data Structure

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Q335. Sort a List of Objects using comparable and comparator

Core Java

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Q336. what does restrict mean when we talk about directive ?

Angular JS

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Q337. how are filters added to expressions?

Angular JS

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Q338. what kind of filters did you worked with ?

Angular JS

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Q339. what is event handler script ?

JavaScript

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Q340. How can java script access a database ?

JavaScript

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Q341. what kind of dtd have you worked with ?

XML

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Q342. What is the difference between save() and persist() in hibernate ?

Hibernate

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Q343. Which is the best collections for maintaining elements in an order ?

Core Java

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Q344. What is difference between url based and component based web application ?

J2EE

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Q345. Why do want to leave your current job ?

General

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Q346. Difference between 32 bit and 64 bit JVM ?

Core Java

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Q347. What is optimistic and pessimistic locking ?

Operating System

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Q348. In Case of multi layered application, If DAO layer throws an exception , How will you handle it upstream ?

Design

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Q349. Tell about shallow and deep cloning ?

Core Java

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Q350. How will you implement your own custom hashmap and linkedlist ?

Data Structure

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Q351. What is the difference between dynamic programming and the brute force algorithm?

Algorithm

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Q352. Design a Program to clone an object and all it's children.

Design

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Q353. Tell something about Dependency Injection and it's drawbacks. In which situation, you may not like to use dependency injection ?

Design

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Q354. Given a String with letters , numbers and special characters , extract Tokens from it. The rules for Token extraction are ac follows

1. Should for token of all characters till a number or special character is found
2. Should form token of all numbers till a character or special character is found
3. Special character in itself is a token
4. Ignore white spaces

For example - Bob Said "He is here"

should result in

Bob A
Said A
" S
He A
is A
here A
" S

where a is specifying alphabet and S as special character

Design

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Q355. Design a Whats app like messaging application.

architecture

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Q356. What is immutability and What are it's disadvantages ?

Design

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Q357. Can you explain any of your project bug for which you had to struggle a lot ?

General

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Q358. Can methods without a return type be declared in Java? Is there a difference between void return type and no return type ?

Core Java

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Q359. Difference between sleep() and Wait()

Operating System

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Q360. how is the internal code for the "volatile" implemented ?

Core Java

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