Core java - Interview Questions and Answers for 'Wells fargo' | Search Interview Question

Core java - Interview Questions and Answers for 'Wells fargo' - 4 question(s) found - Order By Newest

Frequently asked at Manhattan Associates ( Based on 2 feedback )

Q1. What is a Lambda Expression ? What's its use ?

Ans. Its an anonymous method without any declaration.

Lambda Expression are useful to write shorthand Code and hence saves the effort of writing lengthy Code.

It promotes Developer productivity, Better Readable and Reliable code.

Sample Code for lambda

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

_{Like Discuss Correct / Improve java java8 lambda expression architecture Asked in 58 Companies expert frequent}

Try 1 Question(s) Test

Q2. What is a ConcurrentHashMap ?

Core Java

Ans. ConcurrentHashMap is a hashMap that allows concurrent modifications from multiple threads as there can be multiple locks on the same hashmap.

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

_{Like Discuss Correct / Improve java collections hashmap map concurrenthashmap concurrenthashmap concurrency general electric ge Asked in 32 Companies rare}

Q3. why aren't arrays better than array list ?

Core Java

Ans. 1. Arrays don't provide any built in support for sorting searching like operation and we need to do it explicitly.

2. It can hold only homogeneous objects,

3. We have to reserve memory as no dynamic expansion allowed.

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

_{Like Discuss Correct / Improve arrays arraylist arrays vs arraylist Asked in 3 Companies}

Q4. Can you write immutable class without final?

Core Java

Ans. By making the constructor private

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

_{Like Discuss Correct / Improve 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.