Rapid Global Business Solutions Junior Engineer Interview Questions and Answers

Q1. HVAC, FLS & Experience
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Q1. Software Proficiency Test
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Q1. Tell me about yourself
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I am a dedicated and detail-oriented Junior Engineer with a passion for problem-solving and continuous learning.
• Graduated with a degree in Engineering from XYZ University

• Completed internships at ABC Company, gaining hands-on experience in project management

• Proficient in CAD software and technical drawing
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Q2. Diagram of water treatment
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Water treatment involves a series of processes to remove impurities and make water safe for consumption.
• Water treatment typically involves processes such as coagulation, sedimentation, filtration, and disinfection.

• Coagulation involves adding chemicals to water to make particles clump together for easier removal.

• Sedimentation allows the larger particles to settle at the bottom of a tank.

• Filtration involves passing water...read more
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Q1. Personal details
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Q2. Why you want to join
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I want to join because I am passionate about engineering and eager to learn and grow in a dynamic environment.
• Passionate about engineering

• Eager to learn and grow

• Excited about working in a dynamic environment
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It depends on the region, for me they conducted tool test in the 1st round.

Q1. Technical questions on previously done projects
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Q2. About software and tool proficiency
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Hacker Rank test with medium difficulty

Q1. Technical discussion mainly around system design, different architectures, problem solving and coding question may be asked.
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A case study for a problem statement

There were 2 DSA questions that we had to solve on HackerRank. One of them was a medium dynamic programming question - minimum insertions required to make a string palindrome. The other was a fairly easy question that required knowledge of permutations and combinations. We just had to figure out a maths formula given the situation.
1st round also involved a logical game that we had to play. We were scored based on coding + game and shortlisted for next round.

An interviewer joined me on zoom meet and sent a HackerRank link to a question. It was a medium dynamic programming/backtracking question. I solved it but only half the test cases ran while others threw TLE as my recursive code took exponential time.

Q1. Explain what happens after you search a url on your browser. (Had to explain the whole DNS working)
Ans. 
Searching a URL triggers a series of steps involving DNS resolution, server communication, and content rendering in the browser.
• 1. User enters a URL in the browser's address bar.

• 2. The browser checks its cache for the IP address associated with the URL.

• 3. If not found, the browser queries a DNS resolver to resolve the domain name.

• 4. The DNS resolver checks its cache; if not found, it queries root DNS servers.

• 5. The roo...read more
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Q2. Explain how video calling works. (Had to explain the whole OSI model)
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Video calling transmits audio and video data over the internet using the OSI model for communication.
• Application Layer: Video calling apps like Zoom or Skype provide user interfaces for communication.

• Presentation Layer: Data is encoded and compressed (e.g., H.264 for video, AAC for audio) for efficient transmission.

• Session Layer: Establishes, maintains, and terminates connections (e.g., signaling protocols like SIP).

• Tr...read more
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Q3. Asked possible causes of ClassNotFoundException and MemoryOutOfBoundException
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Q4. Asked 2 or 3 case study questions like designing a car infotainment system.
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Q5. Asked about the usefulness of OOPS.
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OOP enhances code reusability, maintainability, and organization through encapsulation, inheritance, and polymorphism.
• Encapsulation: Bundles data and methods, e.g., a 'Car' class with properties like 'speed' and methods like 'accelerate()'.

• Inheritance: Allows new classes to inherit properties from existing ones, e.g., 'ElectricCar' inherits from 'Car'.

• Polymorphism: Enables methods to do different things based on the ob...read more
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Q6. Asked how Java code compiles/runs(had to explain about creation of class file, JVM etc)
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Java code compiles into bytecode, which the JVM executes, enabling platform-independent execution.
• Java source code (.java) is written by the developer.

• The Java compiler (javac) converts .java files into bytecode (.class files).

• Bytecode is platform-independent and can run on any system with a JVM.

• The Java Virtual Machine (JVM) interprets or compiles bytecode into machine code for execution.

• JVM manages memory and provide...read more
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Q7. Asked about working of https.
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HTTPS secures communication over the internet using encryption and authentication protocols.
• HTTPS stands for HyperText Transfer Protocol Secure.

• It uses SSL/TLS protocols to encrypt data between the client and server.

• Encryption ensures that data transmitted (like passwords) is secure from eavesdroppers.

• Authentication verifies the identity of the website, preventing man-in-the-middle attacks.

• Example: When you see 'https:...read more
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Q1. Explain few challenges that you faced during a project/internship.
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During my internship, I faced challenges related to communication, time management, and technical skills.
• Communication challenges: Difficulty in effectively conveying ideas and understanding instructions.

• Time management challenges: Struggling to prioritize tasks and meet deadlines.

• Technical skills challenges: Learning new technologies and troubleshooting issues.

• Example for communication challenge: Working in a team whe...read more
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Q2. Where do you see yourself in 5 years?
Ans. 
In 5 years, I see myself as a Senior Engineer, leading a team and working on complex projects.
• I envision myself taking on more responsibilities and leading a team of engineers.

• I hope to have gained expertise in my field and be recognized as a subject matter expert.

• I aim to work on challenging projects that require problem-solving and innovation.

• I plan to continue learning and staying updated with the latest technologie...read more
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Q3. Explain a project that you did
Ans. 
Developed a mobile app for tracking daily water intake
• Used React Native framework for cross-platform development

• Implemented a user-friendly interface with intuitive design

• Integrated a database to store and retrieve user data

• Implemented push notifications to remind users to drink water

• Conducted testing and debugging to ensure app functionality
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Q4. Tell me about a conflict that you may have faced during a project/internship
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During my internship, I faced a conflict regarding the allocation of resources for a project.
• Conflict arose when team members disagreed on the distribution of resources.

• I suggested a fair and balanced approach to allocate resources based on individual strengths and project requirements.

• We held a team meeting to discuss and resolve the conflict.

• Through open communication and compromise, we reached a consensus on resourc...read more
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In first round they will ask a pseudocode basics.

In second round they ask a question in coding segment in C,C++, Python