10+ Interview Questions and Answers

Program to check for duplicate elements in an arraylist of strings

• Iterate through the arraylist and use a HashSet to store unique elements

• If an element is already in the HashSet, it is a duplicate

• Return true if a duplicate is found, false otherwise

Java program to check for duplicate elements in an ArrayList of strings.

• Iterate through the ArrayList and use a HashSet to store elements as you go.

• If an element is already in the HashSet, it is a duplicate.

• Return true if duplicates are found, false otherwise.

My strongest programming language is Java.

• Extensive experience with Java programming

• Proficient in object-oriented programming

• Familiar with Java frameworks like Spring and Hibernate

Encapsulation and Inheritance are two important OOPS concepts.

• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: Class with private data members and public methods.

• Inheritance: Ability of a class to inherit properties and behavior from another class. Example: Subclass inheriting from a superclass.

Use the url to make a request to the API and fetch data.

• Use a library like axios or fetch to make the HTTP request.

• Parse the response data to extract the necessary information.

• Handle any errors that may occur during the request.

Stack is a data structure that follows Last In First Out (LIFO) principle, while an array is a data structure that stores elements in contiguous memory locations.

• Stack is dynamic in size, while array has a fixed size.

• Stack operations include push and pop, while array operations include random access.

• Example: Stack can be implemented using arrays, but arrays cannot be implemented using stacks.

Reactjs components are reusable, independent pieces of UI that can be composed together to build complex user interfaces.

• Components are the building blocks of a React application

• They can be class components or functional components

• Components can have their own state and lifecycle methods

• Components can be nested within other components to create a hierarchy

• Examples: Button component, Navbar component, UserList component

I will prepare a report by organizing and summarizing the test results in a clear and concise manner.

• Gather all the test results and observations

• Organize the information in a structured format

• Include details such as test cases executed, bugs found, and overall test coverage

• Summarize the key findings and recommendations for improvement

• Ensure the report is easy to understand for stakeholders

To create a bug report, document the issue with clear steps to reproduce and include screenshots or videos if necessary.

• Clearly describe the issue including steps to reproduce

• Include screenshots or videos if applicable

• Specify the environment and conditions in which the bug occurred

• Assign a severity level to the bug based on its impact

• Submit the bug report to the appropriate team for resolution