Green Sources Technical Support Engineer Interview Questions and Answers

There was total of 40 questions
First 20: Aptitude based topics like time and work, profit and loss, speed and distance
Second 20: Programming MCQs based on C, C++ and python. Task is to guess the correct output and errors.

There were 4 coding questions based on array, 2 SQL queries and one article.
Coding questions were easy for batch 2 but difficult for batch 1. Star patterns are present in batch 1.
SQL queries were easy.
One article (200-300)words. Topics was Google maps.

Q1. Founder came and asked approach I used to solve coding questions in round 2. He then check the output for each question. Then he checked the SQL queries I have written, in which I had write two wrong queri...read more
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Q2. He asked me about different approaches to solve a problem
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Q3. He asked about the project I had done on Java Full stack.
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First there will be a topic given to you to write an article of length 300-400 words in 15 mins. This article writing is to check your knowledge of English language.
Then there is a 45 mins round test in which 40 questions will be asked.
20 Technical and 20 Programming.
The programming questions will be from C++, and you are required to choose the correct output of the given C++ program.
The technical aptitude questions were medium to hard.

Q1. It's a 1:30 hr round. In this part, there will be 4 coding questions from arrays topic which you can solve with any programming language you know. Along with this, you will have 2 questions from SQL and e...read more
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It consists of basic aptitude questions and some coding output questions followed by basic SQL questions. Overall the difficulty level was medium.

Q1. They asked me to write code for 4 problems. All questions consists array medium level and then there are difficult SQL questions to solve. Unfortunately I couldn't passed this round. But it was a great lea...read more
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It has general aptitude questions with moderate difficulty

It was mixed coding plus SQL question after the exam I had explain my solution.

Q1. What is polymorphism
Ans. 
Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• It enables a single interface to be used for different data types or classes.

• Examples include method overloading and method overriding in object-oriented programming.
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Q2. Find missing number from nth number array.
Ans. 
Find missing number from nth number array.
• Iterate through the array and calculate the sum of all numbers

• Calculate the sum of numbers from 1 to n using the formula n*(n+1)/2

• Subtract the sum of array from the sum of numbers from 1 to n to find the missing number
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Q3. Explain inheritance and it types
Ans. 
Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.
• Inheritance allows a class to reuse code from another class.

• Types of inheritance include single inheritance, where a class inherits from only one parent class, and multiple inheritance, where a class inherits from multiple parent classes.

• Example: Class B inherits from Class A, so Class B can access
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Q4. Find 2nd max elements from aaray
Ans. 
Find 2nd max element from array of strings
• Sort the array in descending order

• Skip the first element (max element)

• Return the second element
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Coding round on the programming language of your choice

Q1. Telephonic Round
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Q1. Manager Round - Both Soft and Technical skills
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Q1. Offer and Negotiation Round
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Simple Coding questions without DSA

Q1. Basic C#, DSA Questions
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