Oostelijke Onderneming Software Developer Interview Questions and Answers

Q1. How make a queue using a stack
Ans. 
To implement a queue using a stack, use two stacks and simulate the queue operations.
• Use two stacks, one for enqueue operation and one for dequeue operation.

• For enqueue operation, simply push elements onto the stack used for enqueueing.

• For dequeue operation, if the dequeue stack is empty, pop all elements from enqueue stack and push onto dequeue stack.

• Then pop from the dequeue stack to simulate dequeue operation.
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Q2. Create a linked list
Ans. 
A linked list is a data structure consisting of nodes where each node points to the next node in the sequence.
• Create a Node class with data and next pointer

• Initialize a head pointer to null

• Add nodes by updating next pointers

• Traverse the list by following next pointers
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First round 14 Java ,3 SQL ,3 apptitude

3 Java questions strings and Java

Q1. About the programming
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Q2. Your coding questions
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Q1. Self Intro about you
Ans. 
I am a passionate software developer with 5 years of experience in full-stack development.
• Experienced in Java, JavaScript, HTML, CSS, and SQL

• Strong problem-solving skills and ability to work in a team

• Developed a web application for a startup company using React and Node.js
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Q2. About your resume
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Q1. Print unique numbers in list
Ans. 
Print unique numbers in list
• Iterate through the list and store each number in a set to keep track of unique numbers

• Print out the numbers in the set to display the unique numbers
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Q1. Tell me about
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Q2. Your self they are asking
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Q3. What is your weakness
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Q4. Any questions ask for me
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Q5. All the best future
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Coding for international

Q1. AWS basic questions were asked
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Q2. MongoDB, MySQL basic questions were asked
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Quantitative arithmetic,verbal reasoning,non-verbal reasoning,etc

In first round there were two test
1st is the personality test.
2nd is the aptitude test were they asked about 10 aptitude questions and around 40 coding based questions, some of them were mcq and rest were output based.

Contains 4 DSA based questions, 1 question was hard, and other 3 questions were of medium level.