Vawsum Schools Android Developer Interview Questions and Answers

It has include logical ,reasoning question. Aptitude questions are include mcq type question.

Firstly introduce yourself then HR take the one subject then selected candidate discuss on that subject. Subject related talking positive and negative point. Then who candidate speak better these are select in next round.

Six coding questions to be solved within an hour. The coding questions were standard aptitude based and did not include any complex topics like Dynamic Programming or trees in my case.

Q1. I had to solve a problem. Given an expression involving operators and operands with parentheses, convert it to postfix expression. I used the stack data structure.
Ans. 
Convert infix expressions to postfix using the stack data structure for operator precedence and parentheses handling.
• Use a stack to hold operators and parentheses while scanning the expression.

• Output operands (numbers/variables) immediately to the postfix expression.

• Pop operators from the stack to the output when encountering a lower precedence operator.

• Handle parentheses: push '(' onto the stack and pop until '(' when...read more
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Q1. A puzzle question
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Online coding test having basic problems and some aptitude problem.

Q1. Interviewer will ask opps and 2 basic coding problem 2 aptitude problem if you mention any technology in resume then ask about technology and projects
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Q2. What is opps ?
Ans. 
OOPs stands for Object-Oriented Programming, a programming paradigm based on the concept of objects.
• OOPs focuses on creating objects that contain both data and methods to manipulate that data.

• Encapsulation, inheritance, polymorphism, and abstraction are key principles of OOPs.

• Examples of OOPs languages include Java, C++, and Python.
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Q3. What is singleton class ?
Ans. 
A singleton class is a class that can only have one instance created and provides a global point of access to that instance.
• Singleton classes are often used for logging, caching, database connections, and thread pools.

• They typically have a private constructor to prevent instantiation from other classes.

• They provide a static method to access the single instance, which is created if it doesn't exist yet.
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Divisibility, LCM, HCF.
Numbers, Decimals, Fractions, Powers.
Profit, Loss.
Simple interest and Compound interest.
Speed, Distance, Time.
Work and wages.
Trains, Boats, Streams-upstream/downstream, Circular track questions.
Cistern and pipes.

Coding interviews test candidates' technical knowledge, coding ability, problem solving skills, and creativity, typically on a whiteboard.

Choose a topic based on the assignment.
2 Conduct research.
3 Write a thesis statement

Discussion on experience and current role and responsibilities

Q1. 1. Discuss one past project
Ans. 
Developed a web-based inventory management system to streamline stock tracking and order processing for a retail client.
• Utilized React for the front-end, ensuring a responsive and user-friendly interface.

• Implemented a RESTful API using Node.js and Express to handle data transactions.

• Integrated a PostgreSQL database for efficient data storage and retrieval.

• Incorporated real-time notifications for low stock levels using ...read more
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Q2. 2. Design a job scheduler
Ans. 
A job scheduler is a software application that manages the scheduling of tasks or jobs to be executed by a computer system.
• Define the job scheduling requirements such as priority, deadline, resource constraints, etc.

• Implement a scheduling algorithm like First Come First Serve, Shortest Job First, Round Robin, etc.

• Maintain a queue of jobs to be executed and allocate resources accordingly.

• Monitor job execution and handle...read more
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Q1. How much experience you have?
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Q2. How much expecting ?
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60 Minute Duration on 3 topics, including logical, oop and mathematical

Q1. 1st round is of Tech MCQ in all domains, its a bit moderate
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Q2. A Hard Leetcode Problem you can solve with reference
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Q3. Tech Hr with mainly your resume and DSA
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Q4. General HR and Culture fit round
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