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I applied via LinkedIn and was interviewed in Jan 2024. There were 4 interview rounds.
Preparation of Bill of Quantities (BOQ) involves listing all materials, labor, and equipment needed for a project.
Identify all items required for the project
Quantify the amount of each item needed
Estimate the cost of each item
Sum up the total cost to create the BOQ
String inverters are smaller, individual inverters connected to each solar panel, while central inverters are larger inverters that connect to multiple panels.
String inverters are more cost-effective for smaller installations.
Central inverters are more efficient for larger installations due to economies of scale.
String inverters offer more flexibility in system design and monitoring.
Central inverters require less maint...
Losses associated with PVsyst include shading losses, mismatch losses, and soiling losses.
Shading losses occur when shadows from nearby objects or structures fall on the solar panels.
Mismatch losses happen when different solar panels in an array have varying performance levels.
Soiling losses occur when dirt, dust, or other debris accumulates on the surface of the panels, reducing their efficiency.
PV module refers to the basic building block of a solar panel, consisting of multiple solar cells connected in series and parallel.
PV modules can be made using different technologies such as monocrystalline, polycrystalline, and thin-film.
Monocrystalline modules are made from single-crystal silicon, offering high efficiency but higher cost.
Polycrystalline modules are made from multiple silicon crystals, providing a bal...
Calculate the number of strings and modules in a system design
Calculate the total number of modules required for the system
Determine the number of strings needed based on the module specifications
Consider factors such as voltage, current, and power ratings when calculating strings and modules
Bifacial modules can generate electricity from both sides, while monofacial modules only generate from one side.
Bifacial modules can capture sunlight from both the front and back sides, increasing energy production.
Monofacial modules only have one active side for capturing sunlight.
Bifacial modules are more efficient but also more expensive than monofacial modules.
Examples of bifacial modules include LG NeON 2 BiFacial...
PV connectors are essential components in solar power systems for connecting solar panels to inverters or other components.
PV connectors are used to connect solar panels to inverters, charge controllers, or other components in a solar power system.
They ensure a secure and reliable electrical connection between the solar panels and other system components.
PV connectors come in different types such as MC4 connectors, whi...
RS485 cables are used in industrial automation, building automation, and control systems for reliable long-distance communication.
Used in industrial automation for connecting sensors, actuators, and controllers over long distances
Commonly used in building automation systems for HVAC control, lighting control, and access control
Ideal for control systems requiring reliable communication over long distances
Can support mul...
SPD stands for Serial Presence Detect, which is a standardized way to access information about memory modules.
SPD provides information about memory module size, speed, manufacturer, and other details.
There are different classes of SPD, such as DDR, DDR2, DDR3, and DDR4.
SPD data is stored on a small EEPROM chip on the memory module.
System BIOS reads SPD data to configure memory settings for optimal performance.
CUF stands for Capacity Utilization Factor and is used to calculate the efficiency of a system or component.
CUF is calculated by dividing the actual output of a system or component by its maximum possible output.
Formula: CUF = (Actual Output / Maximum Possible Output) * 100%
For example, if a solar panel has an actual output of 500 kWh and a maximum possible output of 1000 kWh, the CUF would be 50%.
Protections involved in an ACCB panel include overload protection, short circuit protection, earth fault protection, and overvoltage protection.
Overload protection: prevents excessive current flow through the panel.
Short circuit protection: detects and interrupts short circuits to prevent damage.
Earth fault protection: detects leakage current to ground and isolates the circuit.
Overvoltage protection: safeguards against
Communication protocols are rules and conventions for exchanging data between devices.
Communication protocols define the format, timing, sequencing, and error checking of data exchange.
Examples of communication protocols include TCP/IP, HTTP, FTP, and MQTT.
Protocols can be categorized as wired (e.g. Ethernet) or wireless (e.g. Wi-Fi).
ONAN cooling is a method of cooling used in transformers.
ONAN stands for Oil Natural Air Natural cooling
In ONAN cooling, the transformer is cooled by circulating oil inside the transformer tank and allowing natural air to cool the oil
This method is commonly used in smaller transformers where the heat dissipation is not as high
Soiling loss is the reduction in solar panel efficiency due to dirt, dust, or other debris covering the surface. Mitigation involves regular cleaning and maintenance.
Soiling loss is the decrease in energy output of solar panels caused by dirt, dust, or other debris blocking sunlight from reaching the photovoltaic cells.
Mitigation strategies include regular cleaning of the solar panels to remove dirt and debris, as well...
The amount of overloading that can be done depends on the specific system and its components.
The amount of overloading that can be done varies depending on the system's design and capacity.
Overloading beyond the system's capacity can lead to performance degradation, system failure, or damage to components.
It is important to carefully consider the maximum load that a system can handle before overloading it.
Examples of o...
I have a strong interest in renewable energy and its potential to create a sustainable future.
Passionate about exploring innovative solutions for clean energy production
Believe in the importance of reducing carbon footprint and combating climate change
Fascinated by advancements in solar, wind, and hydroelectric technologies
Actively involved in researching and promoting renewable energy initiatives
I chose Ib vogt because of their strong reputation in the renewable energy industry and their commitment to sustainable practices.
Strong reputation in the renewable energy industry
Commitment to sustainable practices
Opportunities for growth and development
Innovative projects and technologies
Positive company culture and values
My 5 year plan is to advance my skills in system design, take on more challenging projects, and eventually move into a leadership role.
Continue learning and improving skills in system design
Take on more complex and challenging projects to expand knowledge and experience
Work towards gaining leadership skills and eventually move into a leadership role
Network with professionals in the field to learn from their experiences
Short term goal is to gain experience in system design and long term goal is to become a lead system design engineer.
Short term goal: Gain experience in system design through hands-on projects and mentorship.
Long term goal: Become a lead system design engineer by continuously learning and taking on more responsibilities.
Example: Short term - Completing a certification course in system design. Long term - Leading a team
I applied via Recruitment Consultant and was interviewed before Jul 2020. There was 1 interview round.
I appeared for an interview before Sep 2020.
Round duration - 60 minutes
Round difficulty - Easy
Round duration - 50 minutes
Round difficulty - Easy
Round duration - 60 minutes
Round difficulty - Easy
At the beginning of this round, the interviewer asked me about the data structures I knew. Linked lists, trees, graphs, arrays etc. was my answer. He asked me how well I knew Dynamic Programming. I said I wasn’t strong in that and he said that he would ask me a question on dynamic programming for sure.
Round duration - 40 minutes
Round difficulty - Easy
The interviewer asked me if I was comfortable with the interview process so far and how the previous interviews were. I said it was good and he gave me the first problem to solve.
Round duration - 60 minutes
Round difficulty - Easy
The interviewer asked me some Computer Science fundamentals in this round as well as some behavioural questions.
Implement a Trie data structure with insert and search functions.
Create a TrieNode class with children and isEndOfWord attributes.
Implement insert function to add words by iterating through characters.
Implement search function to check if a word exists by traversing the Trie.
Example: Insert 'apple', 'banana', 'orange' and search for 'apple' and 'grape'.
Do lot of hard work and practice of Data Structures and Algorithms based questions. I personally recommend you Coding Ninjas and Geeks For Geeks for interview preparation.
Application resume tips for other job seekersMake your resume short and try to make it of one page only and do mention all your skills which you are confident of in your resume.
Final outcome of the interviewSelectedI applied via Naukri.com
I appeared for an interview in Aug 2017.
Merge Sort is a divide and conquer algorithm that sorts an array by dividing it into two halves, sorting them separately, and then merging the sorted halves.
Divide the array into two halves
Recursively sort the two halves
Merge the sorted halves
Find pairs of integers in a BST whose sum is equal to a given number.
Traverse the BST and store the values in a hash set.
For each node, check if (X - node.value) exists in the hash set.
If yes, add the pair (node.value, X - node.value) to the result.
Continue traversal until all nodes are processed.
Merge overlapping time intervals into mutually exclusive intervals.
Sort the intervals based on their start time.
Iterate through the intervals and merge overlapping intervals.
Output the mutually exclusive intervals.
Example: [(1,3), (2,6), (8,10), (15,18)] -> [(1,6), (8,10), (15,18)]
Different types of hashing and alternative for Linear Chaining
Different types of hashing include division, multiplication, and universal hashing
Alternative for Linear Chaining is Open Addressing
Open Addressing includes Linear Probing, Quadratic Probing, and Double Hashing
An AVL tree is a self-balancing binary search tree where the heights of the left and right subtrees differ by at most one.
AVL tree is a binary search tree with additional balance factor for each node.
The balance factor is the difference between the heights of the left and right subtrees.
Insertion and deletion operations in AVL tree maintain the balance factor to ensure the tree remains balanced.
Rotations are performed ...
Find the minimum number of squares whose sum equals to a given number n.
Use dynamic programming to solve the problem efficiently.
Start with finding the square root of n and check if it is a perfect square.
If not, then try to find the minimum number of squares required for the remaining number.
Repeat the process until the remaining number becomes 0.
Return the minimum number of squares required for the given number n.
Insertion sort for a singly linked list.
Traverse the list and compare each node with the previous nodes
If the current node is smaller, swap it with the previous node
Repeat until the end of the list is reached
Time complexity is O(n^2)
I applied via Naukri.com and was interviewed in May 2019. There were 4 interview rounds.
I applied via Company Website and was interviewed in May 2019. There were 5 interview rounds.
I applied via Company Website and was interviewed in May 2019. There were 4 interview rounds.
Implemented a new customer feedback system that increased customer satisfaction by 20%
Implemented a new customer feedback system to gather insights and improve customer experience
Analyzed feedback data to identify common issues and areas for improvement
Implemented changes based on feedback to address customer concerns and enhance overall satisfaction
Trained team members on how to effectively use the new system and inte...
based on 4 interviews
Interview experience
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