Jforce Solutions Springboot Developer Interview Questions and Answers

Q1. Spring filters explained briefly
Ans. 
Spring filters are components in Spring framework that intercept incoming HTTP requests and outgoing HTTP responses.
• Filters are used to perform tasks like logging, authentication, authorization, etc.

• They are configured in the web.xml file or using annotations like @WebFilter.

• Example: javax.servlet.Filter interface is implemented to create custom filters.
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Q2. Spring security concepts
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Q3. Flat map vs map
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Flat map is used to flatten nested collections, while map is used to transform elements in a collection.
• Flat map is used when you have a collection of collections and you want to flatten it into a single collection.

• Map is used to transform each element in a collection using a given function.

• Example: Using flatMap to flatten a list of lists - list.stream().flatMap(List::stream).collect(Collectors.toList())

• Example: Using...read more
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Q4. Stream apI in java 8 explanation
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Stream API in Java 8 allows for functional-style operations on collections.
• Stream API provides a way to process collections of objects in a functional way.

• It supports operations like filter, map, reduce, and collect.

• Example: List names = Arrays.asList("Alice", "Bob", "Charlie"); Stream stream = names.stream();

• Example: List numbers = Arrays.asList(1, 2, 3, 4, 5); int sum = numbers.stream().filter(n -> n % 2 == 0).mapToI
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Q5. Paraller programming concepts in java 8
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Java 8 introduced parallel programming concepts like streams, parallel streams, and CompletableFuture.
• Java 8 introduced streams which allow for functional-style operations on collections.

• Parallel streams allow for parallel processing of stream elements, improving performance on multi-core processors.

• CompletableFuture class enables asynchronous programming by representing a future result of an asynchronous computation.
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Q6. Abstract vs interfcae
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Abstract classes can have both abstract and non-abstract methods, while interfaces can only have abstract methods.
• Abstract classes can have constructors, fields, and methods, while interfaces cannot.

• A class can implement multiple interfaces but can only extend one abstract class.

• Abstract classes are used to define a common behavior for subclasses, while interfaces are used to define a contract for classes to implement.

• ...read more
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Q7. SOLID principle explain
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SOLID is a set of five design principles to make software designs more understandable, flexible, and maintainable.
• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Objects of a superclass should be replaceable with objects of its subclasses without aff...read more
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Q8. Static keyword explain
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Static keyword is used in Java to create class-level variables and methods.
• Static variables are shared among all instances of a class

• Static methods can be called without creating an instance of the class

• Static keyword can also be used to create static blocks for initialization
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Q1. Oops, basic ,SQL ,ado
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Curd operation with SQL connectivity

Ms office,Core Java , Tally , C,

In my Opinion,view , If you ask me, As far as I can see/I am Concerned , It seems to me that , I think /feel/reckon/ belive , If you want my option , What we have to decide

Q1. Tell me about your self?
Ans. Thank you for giving me this opportunity my name is KOLA SHIREESHA I am from peddavaram village,tiruvuru mandal, ntr district, comeing to my education qualification my schooling at zpss chennuru and my inter in akshara junior college tiruvuru and my graduation in Sai degree college TIRUVURU and next coming to my family details my family consists 4members including me. My father's name is KOLA VENKANNA.he is business ma...read more
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Q2. What is the full form of BDA
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BDA stands for Big Data Analytics.
• BDA refers to the process of examining large and complex data sets to uncover patterns, correlations, and insights.

• It involves using various techniques and tools to analyze data and make informed business decisions.

• Examples of BDA include analyzing customer behavior data to improve marketing strategies or analyzing financial data to identify potential risks.
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