MOBtexting Software Engineer Interview Questions and Answers

It included aptitude, technical and coding questions

Q1. Questions on SQL(Joins)
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Q2. Questions on arrays, substrings
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Q1. Location preferred
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Remote work preferred, open to occasional travel
• Remote work preferred

• Open to occasional travel

• Flexible with location
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Q2. Family background
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Q1. Basic java fundamentals
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Q2. Spring boot,sql
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Q1. Some technical questions from manager
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Q2. Some challenges or scenario based questions
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Q1. Salary discussion mostly
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Q2. Benifts that they offer with TR
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Q1. What is the inheritance?
Ans. 
Inheritance is a mechanism in object-oriented programming where a class inherits properties and behaviors from another class.
• Allows a class to inherit attributes and methods from another class

• Promotes code reusability and reduces redundancy

• Creates a parent-child relationship between classes

• Derived class can override or extend the functionality of the base class
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Q2. What are the types of joins in mysql
Ans. 
Types of joins in MySQL include inner join, left join, right join, and full join.
• Inner join: Returns rows when there is a match in both tables.

• Left join: Returns all rows from the left table and the matched rows from the right table.

• Right join: Returns all rows from the right table and the matched rows from the left table.

• Full join: Returns rows when there is a match in one of the tables.
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Q1. How to handle multiple api's
Ans. 
Use a centralized API gateway to manage and route requests to multiple APIs efficiently.
• Implement a centralized API gateway to handle incoming requests and route them to the appropriate API based on the endpoint.

• Utilize API management tools like Apigee, Kong, or AWS API Gateway to manage and monitor multiple APIs.

• Consider implementing a caching layer to improve performance and reduce the number of requests to external
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Q2. What does strstr function do?
Ans. 
strstr function searches for a substring within a string and returns a pointer to the first occurrence of the substring.
• Used in C programming language

• Syntax: char *strstr(const char *haystack, const char *needle)

• Example: char *str = strstr("hello world", "world")
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Q1. Return triplets where sum is zero
Ans. 
Find unique triplets in an array that sum up to zero.
• Sort the array first to easily identify duplicates.

• Use two pointers technique to find the triplets.

• Skip duplicates to avoid duplicate triplets.

• Handle edge cases like all zeros or all positive/negative numbers.

• Time complexity can be improved to O(n^2) using two pointers approach.
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Q1. Rotate the matrix 90 degrees clockwise
Ans. 
Rotate an n x n 2D matrix by 90 degrees clockwise in-place without using extra space.
• Iterate through each layer of the matrix, swapping elements in groups of 4

• Use variables to store temporary values during swapping

• Reverse the rows of the matrix to rotate it 90 degrees clockwise
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There are 2 coding questions came in round 1 with time duration of 1 hr. Coding question is related with bitwise operator,array,string

Q1. Tell me about your self
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I am a passionate software engineer with 5 years of experience in developing web applications using various technologies.
• Experienced in full stack web development

• Proficient in languages such as JavaScript, Python, and Java

• Familiar with frameworks like React, Node.js, and Django

• Strong problem-solving and analytical skills

• Excellent communication and teamwork abilities
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Q2. Tell me about your Project
Ans. 
Developed a web application for tracking personal fitness goals and progress
• Used React.js for front-end development

• Implemented RESTful APIs using Node.js and Express for back-end

• Utilized MongoDB for database management

• Incorporated chart.js for visualizing progress data
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Q3. What is Strength
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Strength is the ability to overcome challenges and obstacles, both physically and mentally.
• Physical strength refers to the ability to exert force or lift heavy objects.

• Mental strength involves resilience, determination, and the ability to stay focused under pressure.

• Strength can also refer to emotional resilience and the ability to cope with difficult situations.

• Examples: Weightlifters demonstrate physical strength, wh...read more
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Q4. Tell about your weakness?
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I tend to be overly critical of my own work, which can sometimes lead to perfectionism.
• I have a tendency to spend too much time on a task to ensure it is perfect

• I struggle with delegating tasks to others because I want to make sure they are done correctly

• I am working on finding a balance between striving for excellence and accepting that perfection is not always attainable
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Q5. Journey of collage
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My journey through college was filled with challenges, growth, and memorable experiences.
• Started as a freshman with excitement and nervousness

• Balanced academics, extracurricular activities, and social life

• Learned to manage time effectively and prioritize tasks

• Participated in internships and projects to gain practical experience

• Graduated with valuable skills and knowledge for my career
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Maths ,english ,reasoning, puzzles

Jackeron was the platform

The topic given to me is AI is good or bad

Q1. Program to find prime number
Ans. 
A program to find prime numbers in a given range.
• Iterate through numbers in the given range

• Check if each number is divisible by any number other than 1 and itself

• If not divisible, then the number is prime
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Q2. Program to find the duplicates
Ans. 
Program to find duplicates in an array of strings
• Iterate through the array and store each element in a hash set

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

• Return a list of all duplicates found
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Q1. Self introduction
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Q2. Explanation of project code
Ans. 
The project code is a web application that allows users to create and share interactive quizzes.
• The code uses HTML, CSS, and JavaScript to create the front-end interface.

• It utilizes Node.js and Express for the back-end server.

• MongoDB is used as the database to store user-generated quizzes.

• Socket.io is used for real-time communication between users during quiz sessions.
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Psuedocode and 10 aptitude codes ,pure maths.fill the blank type

First 2 basic code-i.Pattern ii.Fibnocii ,after clearing two then three will be 3 coding question-Standard Leetcode and GFG questions

Q1. You need to Design Sql table mapping based on scenerio
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Q1. About DSA,SQL,BASED ON UR RESSUME
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Q1. ABOUT LOCATION AND PACKAGE
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