Interview Questions and Answers for 'Knight capital' | Search Interview Question

Interview Questions and Answers for 'Knight capital' - 3 question(s) found - Order By Rating

Q1. Write a Program to find the missing integer in an array of consecutive numbers?

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Q2. What are the benefits of creating immutable objects ?

Core Java

Ans. 1. Security and Safety - They can be shared across multiple threads as they are thread safe. Moreover, it protects then from bad state due to interception by the other code segment. One such problem due to mutability and access by alternate code segment could be the change of hash code and then the impact on its search with hash collections.

2. Reuse - In some cases they can be reused as only one copy would exist and hence it can be relied upon. For example - String Pool

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Very frequently asked. Usually asked with questions related to String. Frequently asked at CTS / Cognizant

Q3. What is an Immutable Object ?

Core Java

Ans. Object that can't be changed after instantiation.

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Related Questions

Why is String immutable in Java ?

Why Char array is preferred over String for storing password?

How does making string as immutable helps with securing information ? How does String Pool pose a security threat ?

How is string object immutable if we can concat a string to it ?

How to implement an immutable class ?

What is an immutable class ?

Does Declaring an object "final" makes it immutable ?

Is String final in Java ?

What are stateless objects ? How are they different from immutable objects ? Which of these two is thread safe ?

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