Jio Software Developer Interview Questions and Answers

Fetch data from a public API and display it as a list using JavaScript and HTML for dynamic web applications.

• Choose a Public API: Select an API like JSONPlaceholder or OpenWeatherMap to fetch data. Example: 'https://jsonplaceholder.typicode.com/posts'.

• Use Fetch API: Utilize the Fetch API in JavaScript to make HTTP requests. Example: 'fetch(url).then(response => response.json())'.

• Display Data: Create an HTML lis...read more

Optimizing React applications involves techniques to enhance performance and reduce unnecessary rendering for a smoother user experience.

• Use React.memo: This higher-order component prevents unnecessary re-renders by memoizing the component's output based on its props.

• Implement useCallback and useMemo: These hooks help to memoize functions and values, preventing re-creation on every render, which can improve perfor...read more

Reverse a singly linked list by changing the direction of its pointers.

• Initialize three pointers: prev (null), current (head), and next (null).

• Iterate through the list, updating next to current's next, current's next to prev, and then move prev and current forward.

• Continue until current is null, at which point prev will be the new head of the reversed list.

• Example: For list 1 -> 2 -> 3, the reversed list wil...read more

Efficiently count letter frequencies in a sentence using a hash map for O(n) time complexity.

• Use a hash map (dictionary) to store letter counts.

• Iterate through each character in the sentence.

• Ignore non-letter characters and convert letters to lowercase.

• Example: For 'Hello World', the counts would be {'h': 1, 'e': 1, 'l': 3, 'o': 2, 'w': 1, 'r': 1, 'd': 1}.

Count occurrences of elements, store if count equals x in array of strings.

• Iterate through elements, count occurrences using a hashmap

• Store elements with count equal to x in a separate array

• Return the array of strings with elements that meet the criteria

Effective salary negotiation involves research, clear communication, and understanding your worth in the job market.

• Research industry standards: Use websites like Glassdoor or Payscale to find average salaries for similar roles.

• Know your worth: Consider your skills, experience, and unique contributions that justify a higher salary.

• Practice your pitch: Prepare a clear and concise explanation of why you deserve the ...read more

JSP stands for JavaServer Pages, a technology used for creating dynamic web pages.

• JSP allows embedding Java code in HTML pages

• It simplifies the process of creating dynamic web content

• JSP files are compiled into servlets by the server for execution

Implementing a stack using arrays without custom data structures

• Use an array to store the elements of the stack

• Keep track of the top of the stack using a variable

• Implement push operation by adding elements to the end of the array

• Implement pop operation by removing elements from the end of the array