Commonwealth Bank of Australia, India Quality Engineer Interview Questions and Answers for Experienced

Q1. How do you work on handling multiple windows using Selenium
Ans. 
Handling multiple windows in Selenium involves switching between windows and using window handles.
• Use getWindowHandles() method to get all window handles

• Switch between windows using switchTo().window() method

• Perform actions on the desired window

• Close or quit windows as needed
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Q1. Basic Selenium ques
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Q2. Java string question
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Q1. Agile related question
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Q2. Framework related question
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Its a one hour test.

Q1. Basic Java And Coding
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Q2. Collection in Java , multithreading
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Q1. Testing levels and Test strategy
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Q1. Basic selenium,Java questions
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Q1. Coding questions, framework indepth questions
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Q1. Salary details , Negotiation, compelling force
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Q1. Multi threading print odd even with 2 threads but output should be in sync
Ans. 
Use two threads to print odd and even numbers in sync
• Create two threads, one for printing odd numbers and one for printing even numbers

• Use synchronization mechanisms like mutex or semaphore to ensure output is in sync

• Example: Thread 1 prints odd numbers (1, 3, 5, ...) and Thread 2 prints even numbers (2, 4, 6, ...)
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Q2. Largest common prefix in string array
Ans. 
Find the largest common prefix among an array of strings.
• Iterate through the characters of the first string and compare with the corresponding characters of other strings.

• Stop when a mismatch is found or when reaching the end of any string.

• Return the prefix found so far.
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Q1. Saga pattern in microservice
Ans. 
Saga pattern is a design pattern used in microservices architecture to manage distributed transactions.
• Saga pattern breaks down a transaction into a series of smaller, independent steps.

• Each step in the saga is a separate transaction that can be rolled back if needed.

• If one step fails, compensating transactions can be executed to undo the changes made by previous steps.

• Saga pattern helps maintain data consistency in a ...read more
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Q2. API validation and security
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Q1. Micro service inter communication
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Q2. Hash map hash set implementation
Ans. 
Hash map and hash set are data structures that use hashing to store key-value pairs and unique values respectively.
• Hash map uses key-value pairs where keys are hashed to find the corresponding value

• Hash set stores unique values using hashing to quickly check for duplicates

• Example: HashMap<String, Integer> map = new HashMap<>(); HashSet<Integer> set = new HashSet<>();
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Q1. Validation frame work .
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Q2. Design pattern , .
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Q3. Singleton pattern and how to break
Ans. 
Singleton pattern ensures a class has only one instance and provides a global point of access to it.
• Singleton pattern involves a private constructor, a static method to access the instance, and a static variable to hold the instance.

• To break the singleton pattern, one can use reflection to access the private constructor and create multiple instances.

• Another way to break the singleton pattern is by using serialization a
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Q1. Negotiation on package .
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Q2. Why to join here
Ans. 
I am excited about the innovative projects and collaborative team environment at this company.
• Opportunity to work on cutting-edge projects

• Collaborative team environment

• Strong company culture and values

• Room for growth and advancement

• Positive reputation in the industry
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