Oracle Interview Questions, Process, and Tips

1 coding questions of moderate level

Q1. 10 sql queries question asked to me
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Q2. 2 dsa question, 2nd one was related to 1st one
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Q1. Why should we hire you
Ans. 
I have a strong technical background, excellent problem-solving skills, and a passion for learning and growing in the field.
• I have a Bachelor's degree in Computer Science and relevant technical certifications.

• I have experience working on various technical projects and solving complex technical issues.

• I am a quick learner and always eager to expand my knowledge and skills in the technical field.

• I am a team player and ha...read more
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Q2. How can i trust u, u will be there for 3-4 years
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You can trust me because of my strong work ethic, dedication to my career, and commitment to personal growth.
• I have a proven track record of staying with companies for several years and advancing in my career.

• I am passionate about the work I do and always strive to improve my skills and knowledge.

• I value stability and long-term relationships, both personally and professionally.
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Q1. Rac gg asm dg rman performance tunning
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Q1. Rac, asm, dg, rman, GG,
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Q1. Technical and behaviour
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Q1. Technical and behaviour and confirmation to commitment to Oracle.
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Q1. Asked basic to medium complexity technical and functional questions about the product features and previous projects
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Q1. Asked complex business scenarios handled in the past and methods and ways used to solve them. Also gave a business case example and asked how will you approach to solve it.
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Q1. Asked about most complex project delivered and my contribution in it. Asked about Challengeing business requirement faced in previous project which could not be handled with Oracle and how did you handle ...read more
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Q1. Given an array of strings, print all the possible combinations of strings created by picking one character from each string of the array. The individual strings do not contain any duplicates. Ex: {ABC, DE...read more
Ans. 
Print all possible combinations of strings by picking one character from each string in the array.
• Iterate through each character of the first string and combine it with each character of the second string.

• Repeat the process for all strings in the array to get all possible combinations.

• Use nested loops to generate combinations efficiently.
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Q2. Given an array of size n, print the indices , i which have an equilibrium point around them defined as sum of i-p to i-1 elements = sum of i to t+p-1 elements (equal sum on left side and right side of the ...read more
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Q1. Check if given string has Balanced Parentheses.
Ans. 
Check if a string has balanced parentheses.
• Use a stack to keep track of opening parentheses.

• Iterate through the string and push opening parentheses onto the stack.

• When a closing parenthesis is encountered, pop from the stack and check if it matches the closing parenthesis.

• If stack is empty at the end and all parentheses are matched, the string has balanced parentheses.
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Q2. Modified Balanced Parentheses where a character can be matched with any other character, i.e. / with &, ! with ? and so on.
Ans. 
Modified Balanced Parentheses where characters can be matched with any other character.
• Use a stack to keep track of opening characters

• When encountering a closing character, check if it matches the top of the stack

• If it matches, pop from the stack, else return false

• Continue until end of string, return true if stack is empty
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Q3. Very similar to print the spiral order traversal of a matrix
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Q1. Given a date in string format, write a java program to return the date n days after the given date. Solve the question without using DateTimeFormatter or any similar Date parsing libraries.
Ans. 
Java program to calculate date n days after given date without using Date parsing libraries.
• Parse the input date string to extract day, month, and year components.

• Calculate the total number of days represented by the input date.

• Add the specified number of days to the total days calculated.

• Convert the final total days back to day, month, and year components to get the new date.
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Q1. Java OOP questions: Function overloading and overriding, use of static function, difference between final, finally and finalize keywords.
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Q2. Print all Pythagorean triplets within a given range.
Ans. 
Print Pythagorean triplets within a given range.
• Iterate through all possible combinations of a, b, and c within the given range

• Check if a^2 + b^2 = c^2 for each combination

• Print the triplets that satisfy the Pythagorean theorem
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Q3. Print all combinations of numbers in an array which sum up to a number k. Ex : Arr={3,1,4,5} k=5 Ans : {{1,4},{5}}
Ans. 
Use backtracking to find all combinations of numbers in an array that sum up to a given number.
• Start by sorting the array in non-decreasing order to easily identify combinations.

• Use backtracking to recursively find all combinations that sum up to the target number.

• Keep track of the current combination and the remaining sum as you traverse the array.

• Add the current combination to the result when the sum equals the targe
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Q4. Standard behavioural questions: Why Oracle? Where do you see yourself in 5 years? Your strengths and weaknesses.
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Basic one along with os, dbms fundamentals

One question can be solved using dp

Q1. Identify the longest palindromic substring
Ans. 
A palindromic substring is a string that reads the same forwards and backwards.
• Use dynamic programming to find the longest palindromic substring.

• Start by considering each character as the center of a potential palindrome.

• Expand outwards from each center to check for palindromic property.

• Keep track of the longest palindromic substring found so far.

• Example: Input 'babad', Output 'bab' or 'aba'.
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Q2. Questions based on resume/projects
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