Oracle Financial Services Software Interview Questions, Process, and Tips

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Duration : - 1 Hour
Platform : - Hackerrank
Topics : - REST API, SQL and DSA

Q1. How to create a table in SQL and elements to it.
Ans. 
To create a table in SQL, use the CREATE TABLE statement and define its elements.
• Use CREATE TABLE statement followed by table name

• Define columns with data types and constraints

• Add primary key constraint to uniquely identify each row

• Example: CREATE TABLE customers (id INT PRIMARY KEY, name VARCHAR(50), email VARCHAR(50))
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Q2. How to use JOIN operation on tables. Give an Example.
Ans. 
JOIN operation is used to combine rows from two or more tables based on a related column between them.
• JOIN can be used with different types like INNER, LEFT, RIGHT, FULL OUTER, etc.

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column;

• JOIN can be used to fetch data from multiple tables in a single query.
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Q1. Bubble sort algorithm and how to optimize it.
Ans. 
Bubble sort repeatedly swaps adjacent elements if they are in wrong order.
• Bubble sort has a time complexity of O(n^2).

• It is not efficient for large datasets.

• Optimizations include adding a flag to check if any swaps were made in a pass and stopping if none were made.

• Another optimization is to keep track of the last swapped index and only iterate up to that index in the next pass.
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Q2. Balanced Parenthesis using Stack
Ans. 
Balanced Parenthesis using Stack is a problem to check if the given expression has balanced parentheses or not.
• Create an empty stack

• Traverse the expression string and for each character, check if it is an opening parenthesis

• If it is an opening parenthesis, push it onto the stack

• If it is a closing parenthesis, check if the stack is empty or if the top element of the stack is the corresponding opening parenthesis

• If the s...read more
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Q3. Kth largest element in an array
Ans. 
Finding the Kth largest element in an array.
• Sort the array in descending order and return the Kth element.

• Use a max heap to find the Kth largest element.

• Use quickselect algorithm to find the Kth largest element.
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Q1. Why OFSS ? How you are better than others?
Ans. 
OFSS is a leading consulting firm with a strong track record. I am better than others because of my skills, experience, and dedication.
• OFSS is a well-established and reputable consulting firm with a proven track record of success.

• I have a strong skill set and relevant experience that make me a valuable asset to OFSS.

• I am dedicated and committed to delivering high-quality results for clients.

• I have a track record of exc...read more
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Q2. Why you consider yourself fit for this role?
Ans. 
I am fit for this role because of my strong analytical skills, ability to work in a team, and experience in consulting.
• Strong analytical skills: I have a proven track record of analyzing complex problems and providing effective solutions.

• Ability to work in a team: I excel in collaborating with diverse teams to achieve common goals.

• Experience in consulting: I have previously worked as a consultant, gaining valuable expe...read more
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Good question on train problems and english

Rest API questions and trees questions in data structure

Q1. Fundamentals of Oracle DB and Architecture
Ans. 
Fundamentals of Oracle DB and Architecture
• Oracle Database is a relational database management system (RDBMS)

• It uses SQL (Structured Query Language) for querying and managing data

• Consists of physical and logical structures like data files, tablespaces, and schemas

• Architecture includes components like instance, memory structures, and background processes
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Q2. Prepare well for the Architecture and Basics
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Q1. Fundamentals of Oracle DB, RAC, DG and Architecture.
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Q2. Work experience, questions related to your experience
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Q1. Default question, which hiring manager asks
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