TechO2 Interview Questions and Answers

4 easy level questions will be asked basically from arrays and strings.

Assignment will be given after clearing coding round. In my case ELearning Platform project was given and 7 days time was given to complete.

Q1. DBMS questions like ACID properties, database transaction. Etc
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Q2. Project related questions
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Q3. Basic and conceptual questions of frameworks you know
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Q4. Basic coding questions like armstrong number, palendromic sequence, recursion
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Q1. How would you utilize AWS or Azure services to create scalable web applications
Ans. 
Utilize AWS or Azure services for scalable web applications
• Use AWS Elastic Beanstalk or Azure App Service for easy deployment and scaling

• Leverage AWS Lambda or Azure Functions for serverless computing

• Utilize AWS Auto Scaling or Azure Autoscale to automatically adjust resources based on traffic

• Store data in AWS RDS or Azure SQL Database for scalable database solutions

• Use AWS CloudFront or Azure CDN for content delivery
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Q2. How would you tackle memory leaks if the system your working on was experiencing this issue?
Ans. 
I would use memory profiling tools to identify the source of the leaks and then fix them by properly managing memory allocation and deallocation.
• Use memory profiling tools like Valgrind or Instruments to identify the source of the leaks

• Review the code to ensure proper memory allocation and deallocation practices are being followed

• Implement smart pointers or garbage collection to automatically manage memory

• Use static co...read more
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Q3. Have you worked on legacy systems?
Ans. 
Yes, I have experience working on legacy systems.
• I have successfully maintained and upgraded legacy systems to meet current business needs.

• I have refactored legacy code to improve performance and scalability.

• I have integrated new technologies with legacy systems to enhance functionality.

• I have experience troubleshooting and debugging issues in legacy systems.
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Q1. Are you capable to work with cross functional teams and handle disputes effectively
Ans. 
Yes, I have experience working with cross functional teams and resolving disputes effectively.
• I have successfully collaborated with team members from different departments to achieve project goals.

• I am skilled at mediating conflicts and finding mutually beneficial solutions.

• I prioritize open communication and actively listen to all team members' perspectives.

• I have experience using conflict resolution techniques such a
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Basically It is a list of 25 questions having mix of Resoning,Aptitude &English. Each Queztion carries 2 marks and also there was a plus point that it doesn't have any negative marks

Q1. Basically it is about the Technical Subjects that U mention eariler in your coresponding CV's. Whatever Subject you meantioned their gonna answer about it for tge questions regarding to that subject
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Q1. Brief Description about Youself
Ans. 
I am a passionate software developer with a strong background in computer science and a love for problem-solving.
• Graduated with a degree in Computer Science from XYZ University

• Proficient in programming languages such as Java, Python, and C++

• Experience with web development using HTML, CSS, and JavaScript

• Completed internships at ABC Company and DEF Company

• Participated in coding competitions like Codeforces and LeetCode
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Q2. What is your goal in Life
Ans. 
My goal in life is to continuously learn and grow, both personally and professionally, while making a positive impact on others.
• Continuous learning and self-improvement

• Making a positive impact on others

• Achieving personal and professional growth

• Contributing to the community or society

• Finding fulfillment and happiness in my pursuits
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Q3. What do you know about tgis job Profile
Ans. 
Software Developer Trainee involves learning and applying software development skills under supervision.
• Learning programming languages and tools

• Assisting in developing and testing software applications

• Participating in team meetings and code reviews

• Receiving mentorship and guidance from senior developers
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Q4. Why should we hire you instead of all achoknowledgable freshers sitting behind for this job role ?
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Q5. What are ur hobbies and strengths and weeknesses
Ans. 
My hobbies include coding, reading, and playing video games. My strengths are problem-solving, attention to detail, and adaptability. My weaknesses are public speaking and time management.
• Hobbies: coding, reading, playing video games

• Strengths: problem-solving, attention to detail, adaptability

• Weaknesses: public speaking, time management
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Q6. Why you want to do this job role
Ans. 
I am passionate about coding and problem-solving, and I believe this job role will provide me with the opportunity to learn and grow as a software developer.
• Passionate about coding and problem-solving

• Opportunity to learn and grow as a software developer

• Excited about the challenges and projects in this role
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Q7. Why you want to join us instead of other good companies.
Ans. 
I am drawn to your company's innovative projects and collaborative work culture.
• I am impressed by the cutting-edge technologies your company is using.

• I value the emphasis your company places on teamwork and professional development.

• I believe my skills and passion align well with the opportunities at your company.
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Q8. How you balance yourself in a fatal situation
Ans. 
I remain calm, assess the situation, prioritize tasks, and take necessary actions to mitigate the risk.
• Stay calm and composed to think clearly

• Assess the situation to understand the severity

• Prioritize tasks based on urgency

• Take necessary actions to mitigate the risk
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Q9. If you alredy working under a company but want to switch it then the questions will remain same but just add some 2 to 3 extra questions like i am meantioning it down👇
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Q10. What was ur job profile
Ans. 
I was responsible for developing and maintaining software applications.
• Developed new features and functionalities for existing software applications

• Fixed bugs and issues reported by users

• Collaborated with team members to design and implement solutions

• Participated in code reviews and testing processes
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Q11. How do u know about our company
Ans. 
Researched online, read about company culture, projects, and achievements.
• Visited company website and read about the services offered

• Checked out company's LinkedIn page for updates and employee reviews

• Read articles or news related to the company's recent projects or achievements
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Q12. Did u Resign by ur own or The comapny Resign you ??
Ans. 
I resigned from my previous position voluntarily.
• I resigned from my previous job on my own accord.

• I made the decision to leave the company.

• I chose to resign from my previous role.

• I voluntarily left my previous position.
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Q13. What was ur salary their
Ans. 
I am not comfortable sharing my previous salary information.
• I prefer not to disclose my previous salary as it is confidential information.

• I believe that my salary history should not be a determining factor for my potential as a Software Developer Trainee.

• I am more focused on the opportunities and growth potential that this position offers rather than past salary.

• I am confident that my skills and qualifications align wi...read more
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Q14. Incase u alredy have an experience in a better company then interviewer ask this -* why joing us instead u have an magnificent well role on your comapny*
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Q1. Number series in aptitude
Ans. 
Number series in aptitude involves identifying the pattern in a sequence of numbers and predicting the next number.
• Look for patterns such as arithmetic progression, geometric progression, or a combination of both.

• Check for alternate numbers, differences between consecutive numbers, or multiplication factors.

• Consider prime numbers, squares, cubes, or other mathematical operations applied to the series.

• Example: 2, 4, 6, ...read more
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Q2. Relation ships in berbal
Ans. 
Relationships in verbal communication are crucial for effective collaboration and understanding.
• Verbal communication involves both verbal and non-verbal cues

• Active listening is key to building strong relationships in verbal communication

• Clarity and conciseness in speech can enhance relationships

• Empathy and understanding of others' perspectives are important in verbal relationships
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Q1. Explain the four branches of oops
Ans. 
The four branches of OOP are encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Inheritance: Allowing a class to inherit properties and behavior from another class.

• Polymorphism: The ability for objects of different classes to respond to the same method call.

• Abstraction: Hiding the complex implementation details and showing only
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Q2. Explain about the structures in c
Ans. 
Structures in C are user-defined data types that allow grouping of variables of different data types under a single name.
• Structures are used to represent a record which consists of different data types.

• They are defined using the 'struct' keyword.

• Each variable in a structure is called a member.

• Structures can be nested within other structures.

• Example: struct employee { int emp_id; char emp_name[50]; float emp_salary; };

• E
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Q1. Can you introduce yourself?
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Q2. What is graphQL?, What is REST API? and which is better graphQL or REST API?
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I was asked to discuss the system design of Google Meet, with a primary focus on video processing and WebRTC.

A graph question regarding LC 1334.

Q1. Can you provide an introduction and a summary of your past experiences, as well as your motivations for wanting to join this company?
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Q1. What is the D/B verification and validation in QA?
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Q2. Verification : ensures the product is being built correctly (meet design specifications). Validation : ensures the right product is built (meets user needs and requirements).
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Q1. The Knowledge and Skills
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Q1. The interviewer asked about the process, which differs from company to company. As my current company does not follow the process, the interviewer rejected me.
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Q1. What is hoisting
Ans. 
Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope during compilation.
• Variable declarations are hoisted to the top of their scope but not their initializations.

• Function declarations are fully hoisted, meaning they can be called before they are declared.

• Hoisting can lead to unexpected behavior if not understood properly.
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Q2. What is throttling
Ans. 
Throttling is a technique used to control the rate at which a function is executed.
• Throttling limits the number of times a function can be called over a specified period of time.

• It helps in optimizing performance by preventing excessive function calls, especially in scenarios like scroll events or API requests.

• Example: Throttling can be used to limit the rate at which a user can resize a window, ensuring smoother perfo
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Q3. What is debouncing
Ans. 
Debouncing is a technique used to limit the number of times a function is called in a short period of time.
• Debouncing is often used in scenarios like search bars where you want to wait for the user to finish typing before making an API call.

• It involves setting a delay before executing a function after the last time it was called.

• Debouncing helps in optimizing performance by reducing unnecessary function calls.

• Example: ...read more
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Q4. What is event coupling
Ans. 
Event coupling is the dependency between different parts of a system based on events.
• Event coupling occurs when one component triggers an event that another component listens for.

• It can lead to tight coupling between components, making the system harder to maintain.

• Reducing event coupling can be achieved by using a centralized event bus or implementing a pub/sub pattern.

• Example: A button click event in a UI component t
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Q5. Remove duplicates from array
Ans. 
Use Set to remove duplicates from array of strings
• Create a Set from the array to automatically remove duplicates

• Convert the Set back to an array to get unique values

• Example: const arr = ['apple', 'banana', 'apple', 'orange']; const uniqueArr = [...new Set(arr)];
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Q6. Reverse a Linked List
Ans. 
Reverse a linked list by changing the direction of pointers
• Create three pointers: prev, current, next

• Iterate through the linked list, updating pointers to reverse the direction

• Return the new head of the reversed linked list
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Q7. Explain closure function with an example
Ans. 
Closure function is a function defined inside another function, with access to the outer function's variables.
• Closure functions have access to the outer function's variables even after the outer function has finished executing.

• They can be used to create private variables and functions in JavaScript.

• Example: function outerFunction() { let outerVar = 'I am outer'; function innerFunction() { console.log(outerVar); } retur
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Q1. How to rotate a matrix?
Ans. 
To rotate a matrix, transpose it and then reverse each row or column depending on the direction of rotation.
• Transpose the matrix by swapping elements across the diagonal

• For clockwise rotation, reverse each row of the transposed matrix

• For anti-clockwise rotation, reverse each column of the transposed matrix
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Q2. How to find a particular element in a sorted array?
Ans. 
Use binary search to efficiently find a particular element in a sorted array.
• Start by comparing the target element with the middle element of the array.

• If the target element is less than the middle element, search the left half of the array.

• If the target element is greater than the middle element, search the right half of the array.

• Repeat the process until the target element is found or the search space is empty.
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