Naviga Senior Developer Interview Questions and Answers

Q1. Don't remember so I have no
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Q2. I can't remember it
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Q1. I don't know the res
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Q2. I can't remember it
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Medium level questions asked

Simple easy to medium 2 questions asked of string and array

Q1. Tell me about yourself
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Q2. JavaScript like fetch axios and others
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Questions on dsa, coding question, overall good experience and so on

Q1. Binary search and sorting
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Q2. Prime number coding question
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Q1. What is async javascript
Ans. 
Async JavaScript allows for non-blocking code execution, improving performance by handling multiple tasks simultaneously.
• Async JavaScript uses callbacks, promises, and async/await to handle asynchronous operations.

• It allows for tasks like fetching data from a server or updating the UI without blocking the main thread.

• Example: Using setTimeout to simulate async behavior in JavaScript.
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Q2. Do you know wordpress
Ans. 
Yes, I am familiar with WordPress and have experience in developing websites using it.
• I have worked on creating custom themes and plugins for WordPress.

• I am proficient in using WordPress CMS to manage content and customize websites.

• I have experience in optimizing WordPress websites for performance and SEO.

• I am familiar with popular WordPress plugins like Yoast SEO, WooCommerce, and Contact Form 7.
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Asked related to python

Q1. Tell me about yourself
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Q2. Explain the project in resume
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Q1. Difference between string and string builder.
Ans. 
String is immutable, while StringBuilder is mutable and more efficient for concatenating strings.
• String is immutable, meaning once created, its value cannot be changed. StringBuilder is mutable, allowing for modifications without creating new objects.

• String concatenation creates a new string object each time, while StringBuilder modifies the existing object directly.

• StringBuilder is more efficient for concatenating mul...read more
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Q2. What is async and await
Ans. 
Async and await are keywords in JavaScript used to work with asynchronous code.
• Async is used to define a function as asynchronous, allowing it to run in the background without blocking the main thread.

• Await is used to pause the execution of an async function until a Promise is settled, and then resumes the function with the resolved value.

• Async/await is a more readable and cleaner way to write asynchronous code compare...read more
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Round duration - 70 Minutes
Round difficulty - Medium

Timing was 9:15AM. Platform was not very good. Questions were not well explained.

Q1. 
Merge Overlapping Intervals Problem Statement
Given a specified number of intervals, where each interval is represented by two integers denoting its boundaries, the task is to merge all overlapping interv...read more
Ans. Brute Force
1. We are given the function MERGEINTERVALS(), which takes a 2D vector representing the vector of intervals and returns another 2D vector which is the vector of merged intervals.
2. We create another function ISOVERLAP() to check if the current interval overlaps with the other interval.
3. Now we create an empty 2D vector “RES” to store finally merged intervals and another boolean vector “VIS” to mark if the current in...read more
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Q2. 
Rat in a Maze Problem Statement
You need to determine all possible paths for a rat starting at position (0, 0) in a square maze to reach its destination at (N-1, N-1). The maze is represented as an N*N ma...read more
Ans. Bactracking
Approach: We can start the traversal of the paths from the rat’s starting position, i.e. (0,0) keeping track of the visited cells during the traversal. We will recursively go through all the paths possible until the last index of the grid (destination) is reached, and add the path information using which the rat successfully reached the end.
 
Algorithm is as follows:
 
1. Take the starting position of th...read more
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Q3. 
Problem: Permutations of a String
Given a string STR consisting of lowercase English letters, your task is to return all permutations of the given string in lexicographically increasing order.
Explanatio...read more
Ans. Backtracking
The idea is to fix a character at a position and then find the permutations for rest of the characters.
Make a list ‘ans’ which will contain the permutations of the given string.
 
Algorithm:
Let’s define a function generatePermutaionsHelper(Str, l, r). This function generates the permutations of the substring which starts from index  ‘l’ and ends at index  ‘r’.
• Call the function: generatePermutai...read more
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