10+ Kendriya Vidyalaya Sangathan Interview Questions and Answers

BFS traversal in a disconnected graph starting from vertex 0.

• Implement BFS algorithm to traverse the graph starting from vertex 0.

• Explore neighbor nodes first before moving to the next level neighbors.

• Consider undirected and disconnected graph where not all pairs of vertices have paths connecting them.

• Output the BFS traversal sequence for each test case in a separate line.

• Ensure the BFS path starts from vertex 0 and print connected nodes in numerical sort order.

Given a sorted alien dictionary in an array of strings, determine the character order of the alien language.

• Iterate through the words in the dictionary to find the order of characters.

• Create a graph of characters based on the order of appearance in the words.

• Perform a topological sort on the graph to get the character order of the alien language.

Database connections in JDeveloper are configured in the application's deployment descriptor file. WSDLs are XML-based descriptions of web services.

• Database connections in JDeveloper are configured in the application's deployment descriptor file, typically web.xml or persistence.xml.

• The configuration includes details such as database URL, username, password, and driver class.

• WSDLs (Web Services Description Language) are XML-based descriptions of web services, defining the ope...read more

Different types of testing include unit testing, integration testing, system testing, and acceptance testing.

• Unit testing focuses on testing individual components or units of code.

• Integration testing verifies the interaction between different components.

• System testing ensures the entire system works as expected.

• Acceptance testing validates if the system meets the user's requirements.

• OOPs stands for Object-Oriented Programming.

• Abstraction is a concept in OOP that focuses on hi...read more

Handling faults and errors in API development process and configuring fault policies for securing APIs

• Implement proper error handling mechanisms in the API code to catch and handle faults and errors

• Use logging and monitoring tools to track errors and faults in real-time

• Configure fault policies such as retry mechanisms, circuit breakers, and fallback options to handle errors gracefully

• Secure APIs by implementing authentication and authorization mechanisms, such as API keys, OA...read more

Assess candidate's ability to address HR challenges by evaluating their communication skills, problem-solving abilities, conflict resolution techniques, and knowledge of HR policies.

• Evaluate their communication skills through role-playing scenarios or case studies involving HR issues.

• Assess their problem-solving abilities by presenting them with hypothetical HR challenges and asking how they would approach them.

• Observe their conflict resolution techniques by discussing past e...read more

Algorithm is a set of instructions to solve a problem or perform a task.

• It is a step-by-step procedure to solve a problem.

• It can be represented using flowcharts or pseudocode.

• Examples include sorting algorithms like bubble sort and quicksort.

• Efficiency of an algorithm is measured using time and space complexity.

Annotations in Spring Boot, immutability of strings, try-catch exceptions, and collections

• Annotations in Spring Boot: @RestController, @RequestMapping, @Autowired, @Component, etc.

• String immutability: Strings are immutable to ensure data integrity and security

• Try-catch exceptions: Used to handle and manage exceptions in code execution

• Collections: Data structures like List, Set, Map, etc. to store and manipulate groups of objects

Remove duplicate values from ArrayList

• Create a HashSet from the ArrayList to remove duplicates

• Convert the HashSet back to ArrayList

• Use Collections.sort() to sort the ArrayList if needed

Asynchronous and synchronous are two ways of handling requests in SpringBoot.

• Synchronous requests block the thread until a response is received.

• Asynchronous requests do not block the thread and allow for parallel processing.

• SpringBoot supports both synchronous and asynchronous processing.

• Asynchronous processing can improve performance and scalability.

• Examples of asynchronous processing in SpringBoot include using CompletableFuture and Reactive Streams.

Array methods and properties in C#

• Length property returns the number of elements in an array

• IndexOf method returns the index of the first occurrence of a specified element

• Sort method sorts the elements in an array in ascending order

• Reverse method reverses the order of the elements in an array

My expected CTC is negotiable based on the role, responsibilities, and benefits offered by the company.

• My expected CTC is based on my experience, skills, and market standards.

• I am open to discussing the salary package during the negotiation process.

• I value the overall compensation package, including benefits and growth opportunities.

Exception handling is a programming concept that deals with errors during program execution.

• Use try-catch blocks to handle exceptions in code.

• Throw exceptions to indicate errors in code.

• Use finally block to execute code regardless of whether an exception is thrown or not.

Search retrieves the first occurrence of a specified value, while search all retrieves all occurrences.

• Search returns the index of the first occurrence of a specified value in a string, array, or object

• Search all returns an array of all indices of the specified value in a string, array, or object

• Search is more efficient for finding the first occurrence, while search all is useful for finding all occurrences