Oracle Interview Questions, Process, and Tips

Q1. Design pattern used
Ans. 
The design pattern used is the Factory Method pattern.
• Creates objects without specifying the exact class of object that will be created

• Defines an interface for creating objects, but lets subclasses decide which class to instantiate
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Q2. Scenario based question
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Q1. Why are you joining this company
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Q2. Challenges faced in previous projects
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Q1. Full Java Theories
Ans. 
Full Java Theories cover the core concepts of Java programming language.
• Object-oriented programming

• Inheritance, polymorphism, encapsulation, and abstraction

• Exception handling

• Multithreading

• Collections framework
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Q1. Write a code to create a class (with some attributes) and sort the objects on the basis of their attributes and print the same.
Ans. 
Create a class with attributes, sort objects based on attributes, and print.
• Create a class with attributes like name, age, and salary

• Implement Comparable interface to define sorting logic based on attributes

• Create objects of the class, add them to a list, and use Collections.sort() to sort them

• Print the sorted objects
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Q2. Selenium coding exercise to automate a scenario: launch amazon website and Enter text "Mobile" in the search box and retrieve the name and price of all the results and store it in the custom class (with tw...read more
Ans. 
Automate scenario to search for 'Mobile' on Amazon, retrieve name and price of results, store in custom class, and display on console.
• Use Selenium WebDriver to launch Amazon website

• Locate search box element and enter 'Mobile' text

• Retrieve name and price of search results using appropriate locators

• Store name and price in custom class with attributes 'name' and 'product'

• Display stored data on console
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A basic dynamic programming question similar to the "pick or not pick" problem.

Q1. Dsa questions cs fundamentals resume based questions
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Q1. SCCP layer explanation
Ans. 
SCCP layer is a signaling protocol used in telecommunication networks for call setup and management.
• SCCP stands for Signaling Connection Control Part

• It is used in SS7 (Signaling System 7) networks

• SCCP provides additional functionality compared to MTP (Message Transfer Part)

• It handles addressing, routing, and error detection in the network

• Examples of SCCP messages include connection request, connection confirm, and conn
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Q2. MO MT call flow
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Q1. Diameter Protocol
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Q2. SS7 Protocol layers
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Q1. SMS/SMSC call flow
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Q2. MAP and CAMEL protocol layers
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Q1. String manipulation questions without using default methods like string buffer
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Q2. Selenium programs and Xpaths for dynamic tables
Ans. 
Selenium can be used to automate testing of dynamic tables by using Xpaths to locate elements.
• Identify unique attributes of table elements to create stable Xpaths

• Use functions like contains(), starts-with(), or ends-with() in Xpaths for dynamic content

• Consider using parent-child relationships in Xpaths for nested tables
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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...
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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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