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Interview Questions and Answers - Order By Newest

Q3051. Details of networking apis supported by java.

Ans. retrofit 2, volly and OkHttp

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Q3052. What are different awt constructs ?

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

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Q3053. Combine and join integer and string list to single list and sort.

Core Java

Ans. Object[] combined = new Object[first.length second.length];
System.arraycopy(first, 0, combined, 0, first.length);
System.arraycopy(second, 0, combined, first.length, second.length);

-- OR --

Object[] combined = Stream.concat(Arrays.stream(first), Arrays.stream(second)).toArray();

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Q3054. Difference between interface and inheritance

Core Java

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

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Q3055. C dynamic memory questions

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

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Q3056. Write program to control traffic in a parking lot.

Design

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

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Q3057. What is stereotype annotation ?

Spring

Ans. These annotations are used to create Spring beans automatically in the application context. The main stereotype annotation is @Component . @Controller: Which is used to create Spring beans at the controller layer. The stereotype annotations in spring are @Component, @Service, @Repository and @Controller

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Q3058. what is dispatcher servlet@componentScan use ?

Spring Framework

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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Q3059. 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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Q3060. Give specific situation about when to go for constructor based injection and setter based injection in spring.

Spring

^{This question was recently asked at 'Tata Consultancy (TCS)'.This question is still unanswered. Can you please provide an answer.}

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Q3061. Can you tell us a use case of reflection in java that you have applied ?

Design

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Q3062. Difference between Spring and Spring MVC ?

Spring

^{This question is still unanswered. Can you please provide an answer.}

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Q3063. Write SQL query to join 2 tables ?

SQL

Ans. Select * from table1 join Select * from table2

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Q3064. 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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Q3065. How to build a blocking queue ?

Data Structure

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

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Q3066. 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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Q3067. What is runtime Polymorphism ?

Design

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

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Q3068. Linked List related questions.

Data Structure

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

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Q3069. SQL Questions.

Database

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

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Q3070. Explain your project details.

General

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

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Q3071. Difference between injection and auto wiring.

Spring

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

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Q3072. Which interface is used for hashset implementation ?

Core Java

Ans. HashSet implements Set interface.

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Q3073. What are the drawbacks of micro services ?

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

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Q3074. Difference between function overloading and method overloading?

Core Java

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Q3075. Explain Working of joins in sql.

Database

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Q3076. JWT internal working

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

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Q3077. Why do we use Hibernate ?

Hibernate

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

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Q3078. 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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Q3079. Write an algorithm for square root of a given number.

Core Java

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

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Q3080. 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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