Oracle Software Engineer II Interview Questions and Answers

Design a system for managing car parking.

• Determine the size and layout of the parking lot.

• Decide on the type of parking system (e.g. self-parking, valet).

• Implement a ticketing system for tracking cars and payments.

• Use sensors or cameras to monitor parking spaces.

• Integrate with a payment gateway for online payments.

• Provide real-time information on available parking spaces.

• Consider implementing a loyalty program for freq...read more

Designing a system for an elevator

• Identify the requirements and constraints

• Determine the number of floors and elevators needed

• Choose the elevator algorithm (e.g. FCFS, SCAN, LOOK)

• Design the elevator controller

• Consider safety features (e.g. emergency stop, overload protection)

• Include user interface (e.g. buttons, displays)

• Consider maintenance and repair

• Test and optimize the system

A photo-sharing app system design

• Use a scalable architecture to handle large amounts of data

• Implement a secure authentication and authorization system

• Utilize a content delivery network (CDN) for fast image loading

• Allow users to tag and categorize photos for easy search and discovery

• Implement a notification system for likes, comments, and new followers

A generic swap function swaps two values of any data type.

• The function should take two parameters of any data type.

• Use a temporary variable to store the value of one parameter.

• Assign the value of the second parameter to the first parameter.

• Assign the value of the temporary variable to the second parameter.

Search for an element in a rotated sorted linked list.

• Find the pivot point where the list is rotated.

• Divide the list into two sublists based on the pivot point.

• Perform binary search on the appropriate sublist.

• Handle edge cases such as empty list and list with only one element.

Search an element in a rotated sorted array

• Find the pivot point where the array is rotated

• Divide the array into two sub-arrays based on pivot point

• Perform binary search on the appropriate sub-array

• Repeat until element is found or sub-array size is 1

Given a Sudoku board, find possible numbers for an empty cell.

• Iterate through empty cells and check possible numbers using row, column, and box constraints.

• Use a set to keep track of possible numbers for each empty cell.

• Return the set of possible numbers for the given empty cell.

Find integer average of 4 unsigned integers without typecasting

• Add all the integers and divide by 4

• Use bit shifting to divide by 4

• Handle overflow by using long long data type

• Use unsigned int data type for input

Code to identify 32 bit or 64 bit architecture of a processor

• Check if the operating system is 32 bit or 64 bit

• If OS is 32 bit, processor is 32 bit

• If OS is 64 bit, check if processor supports 64 bit architecture

• Use CPUID instruction to check if processor supports 64 bit architecture

Convert binary number to base 64 integer

• Divide the binary number into groups of 6 bits

• Convert each group of 6 bits to decimal

• Map the decimal value to the corresponding base 64 character

• Concatenate the base 64 characters to form the final integer

Creating test cases for random scenarios ensures software reliability and robustness through diverse input validation.

• Identify edge cases: Test with minimum and maximum input values, e.g., an empty array vs. a large array.

• Use random data: Generate random inputs to simulate real-world usage, e.g., random user names or passwords.

• Test invalid inputs: Ensure the system handles unexpected inputs gracefully, e.g., negative n...read more