Jupiter Wagons Desktop Support Engineer L1 and L2 Interview Questions and Answers

Confidence is. The key. The questions are medium too tough

Q1. Arrays and all exceptions within coding
Ans. 
Arrays are data structures used to store a collection of elements. Exceptions are errors that occur during program execution.
• Arrays can be one-dimensional or multi-dimensional

• Arrays can be of primitive data types or objects

• Exceptions can be handled using try-catch blocks

• Common exceptions include NullPointerException and ArrayIndexOutOfBoundsException
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Q2. SQL joins and aggregations and window function
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Q1. What are your strengths and weaknesses?
Ans. 
I excel in problem-solving and teamwork, but I sometimes struggle with time management under tight deadlines.
• Strength: Strong problem-solving skills - I enjoy tackling complex coding challenges, like optimizing algorithms for better performance.

• Strength: Effective teamwork - I thrive in collaborative environments, having successfully led a project with cross-functional teams.

• Weakness: Time management - I occasionally u...read more
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Q2. Solve the given question using Binary trees (code given herein), and walk us through your approach.
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Q3. Where do you see yourself in 5 years?
Ans. 
In five years, I envision myself as a lead software engineer, driving innovative projects and mentoring junior developers.
• I aim to lead a team on impactful projects, like developing scalable applications that enhance user experience.

• I plan to deepen my expertise in cloud technologies, contributing to projects that leverage AWS or Azure for better performance.

• I want to mentor junior engineers, sharing knowledge through ...read more
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It was 2 coding questions of medium level

Q1. Longest substring with non repeating characters
Ans. 
Find the longest substring in a given string that does not contain any repeating characters.
• Use a sliding window approach to iterate through the string.

• Keep track of the characters seen so far using a set.

• Update the start and end indices of the window to find the longest substring.

• Return the length of the longest substring.
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Q2. Candy problem. There is similar question in geeks for geeks
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This aptitude + technical MCQ test was of 120 minutes in duration. Had MCQs on quantitative ability, logical ability, Language, and technical MCQs consisted of questions on DBMS, OS, Networks, DSA. There were two coding questions as well. One on Bit Manipulating, and the other on DFS.

Q1. A question on BFS very similar to Leetcode 924. Was given one hour to discuss and come to an optimized solution with the interviewer.
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Q1. Search an element in a sorted and rotated array
Ans. 
Search an element in a sorted and rotated array
• Find the pivot point where the array is rotated

• Divide the array into two sub-arrays based on pivot point

• Perform binary search on the appropriate sub-array
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Q2. SQL query on left join
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Q3. Questions on CPP memory management
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Q4. Questions related to projects done
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Q1. Propose a system for a popular media stream service
Ans. 
Proposed system for a popular media stream service
• Implement a recommendation engine to suggest content based on user preferences and viewing history

• Integrate with social media platforms to allow users to share and discuss content

• Provide multiple subscription options with varying levels of access and features

• Ensure high-quality streaming with minimal buffering through the use of content delivery networks

• Implement robust...read more
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Q2. Questions related to Fullstack Tech Stacks
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Guesstimate on number of Reddit users in India. No starting input was given. Gave solution by using bottom to top approach. Tried to focus on quantifying teenagers with internet access and a particular interest about internet. Gave a figure around ~1 million in a year.

Q1. Where do you see yourself at McKinsey?
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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

Merge Sort, FIFO based question

An App was given to design in given tim eframe

There were 2 questions to test our basic coding knowledge.

Q1. Some basic introduction followed by sort 2 arrays into a single array.
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Q1. Applications of various data structures.
Ans. 
Data structures are used in various applications like search algorithms, storage systems, and graph algorithms.
• Search algorithms like binary search use arrays and trees for efficient searching.

• Storage systems use data structures like hash tables and linked lists for organizing and accessing data.

• Graph algorithms like Dijkstra's algorithm use graphs and trees for solving complex problems.
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Q1. Some basic hr questions like tell me about yourself, what do you know about magicbricks,where do you see yourself in 5 years etc
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He gave a topic for group discussion of ten years of modi government.

DSA, system design, react, redux

DSA, stystem design, react, redux