WAFU Technologies Software Engineer Interview Questions and Answers

Q1. How does hash table work?.
Ans. 
A hash table stores key-value pairs for efficient data retrieval using a hash function to compute an index.
• Uses a hash function to convert keys into array indices.

• Handles collisions using methods like chaining or open addressing.

• Example: Inserting key 'apple' might hash to index 3, storing value 'fruit'.

• Average time complexity for search, insert, and delete is O(1).

• Resizing may occur when the load factor exceeds a cert
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Q2. Difference between multithreading and multiprocessing.
Ans. 
Multithreading uses multiple threads within a single process, while multiprocessing uses multiple processes for parallel execution.
• Multithreading shares the same memory space, making it lightweight and faster for communication.

• Multiprocessing has separate memory spaces, which can lead to better stability and isolation.

• Example of multithreading: A web server handling multiple requests simultaneously.

• Example of multiproc...read more
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The aptitude test was quite easy. You will easily solve the questions in one go

The group discussion around was moderate like the people were divided into different groups one group was of 10 people and you need to speak very well on the given topic as compared to the other guys and your through the round

Q1. Ask about the oops concepts and some programming related questions and after that finally discuss about the projects which I did in the college
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Basic aptitude test very easy

Topic was pros and cons of social media
total time was 10, 2 minutes for each candidate.

Q1. Can you describe a challenging problem you've faced during a project and how you solved it?
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Q2. Tell me about your projects mentioned in the resume.
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Q3. Tell me about yourself
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Q4. Why are you interested in this -- position?
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Q5. What do you know about our company?
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Online Assessment - 1 Hrs

40 question and you have to solve all these and also mention your marks of graduation, they also select the people on the basic of 10, 12th marks,

They give the trending topic like what you learn from the covid19 and all the group discussion topic, and you have 5(for whole group not for only your) minutes and you are free to speak English or Hindi.

Q1. In this round they asked about the technical skill and all you mention in your resume, Tell the full form of PHP.
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Q2. What is role of DBA?
Ans. 
A DBA is responsible for managing and maintaining databases, ensuring data integrity, performance, and security.
• Designing and implementing database structures

• Installing and configuring database software

• Monitoring and optimizing database performance

• Ensuring data security and backup

• Troubleshooting and resolving database issues

• Collaborating with developers and system administrators

• Performing database upgrades and migratio
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Q1. Tell Me Something About Yourself, Your Family Background
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Q2. How you want to work like front-end or back-end?
Ans. 
I am comfortable working in both front-end and back-end development.
• I have experience in both front-end and back-end technologies such as HTML, CSS, JavaScript, React, Node.js, and SQL.

• I enjoy the creativity and design aspect of front-end development, as well as the problem-solving and logic aspect of back-end development.

• I am adaptable and willing to work on whichever aspect is needed for the project at hand.
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Q3. If you get the offer form other company than you switch or not?
Ans. 
It depends on various factors such as salary, benefits, growth opportunities, and work culture.
• Consider the salary offered by the other company. If it is significantly higher, it may be worth considering the switch.

• Evaluate the benefits package offered by the other company. If it includes better healthcare, retirement plans, or other perks, it could be a deciding factor.

• Assess the growth opportunities in both companies...read more
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They given current trending technology

Paper written coding test

Q1. Good experience but didn't get offer
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Q2. Nothing but good experience
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It was medium. It consisted of basic pattern questions

Medium level questions were asked

I can say u have to prepare well if u want to clear the coding test

Q1. Tell me about urself
Ans. 
I am a passionate software engineer with experience in developing web applications and a strong background in computer science.
• Experienced in developing web applications using technologies like HTML, CSS, JavaScript, and React

• Strong background in computer science with knowledge of algorithms and data structures

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

• Familiar with Agile development methodologies
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Q2. Strengths and weaknesses
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Q1. Tell me somenthi g about
Ans. 
I believe there might be a typo in the question. Could you please clarify?
• Ask for clarification on the specific topic or information the interviewer is looking for.

• Offer to provide more details or examples once the question is clarified.
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Q2. What is your name
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Q1. What is your name
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Q2. What is your address
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Q1. What is salary expect
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Q2. What is job expect
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