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

Interview Questions and Answers - Order By Newest

Q2521. what is dispatcher servlet@componentScan use ?

Ans. @ComponentScan in a Spring Application.

With Spring, we use the @ComponentScan annotation along with the @Configuration annotation to specify the packages that we want to be scanned. @ComponentScan without arguments tells Spring to scan the current package and all of its sub-packages.

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Q2522. Write program to recursively iterate through map ?

Core Java

^{This question was recently asked at 'Cloudflare'.This question is still unanswered. Can you please provide an answer.}

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Q2523. Give specific situation about when to go for constructor based injection and setter based injection in spring.

Spring

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Q2524. Can you tell us a use case of reflection in java that you have applied ?

Design

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Q2525. Write SQL query to join 2 tables ?

SQL

Ans. Select * from table1 join Select * from table2

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Q2526. Difference between Query param and path param ?

^{This question was recently asked at 'GSpann Technologies, Motorola Solutions'.This question is still unanswered. Can you please provide an answer.}

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Q2527. How to build a blocking queue ?

Data Structure

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Q2528. Can you give me a use case where you utilized serialization in your project code?

Core Java

Ans. we use serialization when we send response to client in JSON format.(the process of converting model object into json is nothing but serialization

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Q2529. What is runtime Polymorphism ?

Design

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Q2530. Linked List related questions.

Data Structure

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Q2531. Explain your project details.

General

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Q2532. Which interface is used for hashset implementation ?

Core Java

Ans. HashSet implements Set interface.

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Q2533. Difference between function overloading and method overloading?

Core Java

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Q2534. JWT internal working

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Q2535. Which is faster, LinkedList or ArrayList?

Core Java

Ans. ArrayList is fast for random access, but is slow on deletion and insertion.

LinkedList is slow for random access, but is fast on deletion and insertion.

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Q2536. Write an algorithm for square root of a given number.

Core Java

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Q2537. Have you ever worked on any project dealing with authentication and authorization ?

Authentication

Ans. Yes, I have worked on single sign on project.

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Q2538. Can we use combination of two authentication mechanism in an application ? Narrate with an example.

Authentication

Ans. Yes We can use. Negotiate is a very good example with NTLM fallback mechanism over Kerberose.

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Q2539. What is meant by platform ? Which platform does java provides ?

Core Java

Ans. platform is the hardware or software environment in which a program runs. There are two types of platforms software-based and hardware-based. Java provides software-based platform.

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Q2540. Why packages are used in Java ?

Core Java

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Q2541. What are the best strategies to improve code readability ?

General

Ans. https://dzone.com/articles/10-tips-how-to-improve-the-readability-of-your-sof

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Q2542. Give an example of a time when you recommended code changes in a code review that simplified the code ?

Code Review

Ans. If there is a situation to remove duplicates values from an arrayList. Developer implemented using legacy for-loop where I suggested to use Linked hash set to remove duplicates from the list.

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Q2543. How is Docker different than standard virtualization ?

Docker

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Q2544. What are the technologies you would like to work on ?

General

Ans. Java 7 , SQL Server

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Q2545. Is it possible to have a static class ?

Core Java

Ans. We can have a static inner class but not static outer class.

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Q2546. How do you analyze memory leaks in your java application ?

Ans. https://dzone.com/articles/what-to-do-about-java-memory-leaks-tools-fixes-and

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Q2547. Why in Java does it require "static" in the main function?

Core Java

Ans. Because there needs to be a starting point till when there is no object created in memory and hence it needs to be run in static scope

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Q2548. What are the mutable and immutable data types ?

^{This question was recently asked at 'Technicolor,Velotio'.This question is still unanswered. Can you please provide an answer.}

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Q2549. what do mean by J2EE and java?

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Q2550. What are the different types of inheritance ?

Core Java

Ans. Single Level
Multi Level
Hierarchical
Multiple
Hybrid

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