Oracle Software Developer Interview Questions and Answers

Q1. Coding Question based on favorite Data Structure
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Q2. Coding Question based on trees
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Mcqs+ 1 coding test. Solved all

Q1. Longest string with no repeating character
Ans. 
Find the longest string in an array with no repeating characters.
• Iterate through each string in the array

• Use a set to keep track of characters seen so far

• Update the longest string found without repeating characters
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Q2. Generate paranthesis
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Generate all valid combinations of parentheses for a given number n
• Use backtracking to generate all possible combinations of opening and closing parentheses

• Keep track of the number of opening and closing parentheses used

• Add opening parentheses if there are remaining to be used, and add closing parentheses if it won't create an invalid combination
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2 coding question and 30 mcqs of cs fundamental and aptitude

Q1. Asked me to solve DSA question which is based on string problem name is count and say...
Ans. 
The 'Count and Say' problem generates a sequence of strings based on counting consecutive digits.
• The sequence starts with '1'.

• Each subsequent term is generated by describing the previous term.

• For example, '1' becomes '11' (one 1), '11' becomes '21' (two 1s), and '21' becomes '1211' (one 2, then one 1).

• The nth term can be generated iteratively or recursively.
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Q2. Given array contain duplicate elements need to remove duplicates and after deletion oreder of remaining element should remain same..
Ans. 
Remove duplicates from array of strings while maintaining original order.
• Iterate through the array and use a Set to keep track of unique elements.

• Add elements to a new array only if they are not already in the Set.
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1 dsa question and 35 mcq question related ti apis,aptitude,cs core concepts

Q1. Pallindrome question from leetcode
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Q2. Graph question from leetcode
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Coding is nothing but ask about the software language like python, java, etc.,

Q1. Tell about something
Ans. 
I will tell you about my experience working on a team project to develop a mobile app.
• Collaborated with team members to brainstorm ideas and plan project milestones

• Utilized programming languages such as Java and Swift to develop app features

• Conducted testing and debugging to ensure app functionality and user experience

• Received feedback from users and made necessary improvements to the app
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Q2. How did you know the job
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I found the job through a job search website and applied online.
• I was actively looking for software developer positions on job search websites.

• I came across the job posting for this position and it matched my skills and experience.

• I submitted my application online through the company's website.

• I received a call for an interview after my application was reviewed.
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Q1. Why we are hiring you
Ans. 
You are hiring me because of my strong technical skills, experience, and passion for software development.
• Strong technical skills in programming languages such as Java, Python, and C++

• Proven experience in developing and implementing software solutions

• Passion for staying updated with the latest technologies and trends in the industry
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Q2. Tell about your strength
Ans. 
My strength lies in my problem-solving skills, attention to detail, and ability to work well in a team.
• Strong problem-solving skills - I enjoy tackling complex issues and finding creative solutions.

• Attention to detail - I am meticulous in my work, ensuring accuracy and quality.

• Team player - I collaborate effectively with colleagues, contributing to a positive work environment.

• Adaptability - I am able to quickly learn n...read more
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Q1. Insert Delete in O(1)
Ans. 
Achieve O(1) insert and delete using a hash table and a doubly linked list for efficient data management.
• Use a hash table to store key-value pairs for O(1) access.

• Maintain a doubly linked list to keep track of the order of elements.

• For insertion, add the new element to the head of the linked list and update the hash table.

• For deletion, remove the element from the linked list and hash table simultaneously.

• Example: Inser...read more
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Q2. Basic Calculator II
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