KLA Interview Questions and Answers

Using Bitwise OR operation to find the smallest missing number in an array.

• Iterate through the array and perform Bitwise OR operation with each element to set corresponding bit in a bitmask

• Iterate through the bitmask to find the first unset bit, which represents the smallest missing number

• Example: Array [0, 1, 3, 4, 6] would have a bitmask of 10101, smallest missing number is 2

Prepare by gathering information from stakeholders, exploring the application, creating test scenarios, and using exploratory testing.

• Gather information from stakeholders to understand the purpose of the application.

• Explore the application to identify key functionalities and potential areas of risk.

• Create test scenarios based on the observed behavior and potential user interactions.

• Use exploratory testing to uncover defects and validate the application's behavior.

• Collaborate ...read more

Pseudo code for a scenario

• Define variables and data structures needed

• Write the main logic using conditional statements and loops

• Handle edge cases and error conditions

• Test the pseudo code with sample inputs

Writing test cases for scenario and bug life cycle

• Create test cases to cover all possible scenarios in the application

• Include positive and negative test cases to ensure thorough testing

• Document bug life cycle stages such as New, Assigned, In Progress, Resolved, Closed

• Verify bug fixes and retest to ensure they are resolved properly

Flow diagram of Wafer Test cases

• Start with wafer preparation

• Perform electrical testing on each die

• Check for defects and record results

• Sort dies based on test results

• End with final wafer disposition

Test cases should cover various scenarios to ensure software quality.

• Test case for positive scenario

• Test case for negative scenario

• Test case for boundary value testing

• Test case for error handling

• Test case for performance testing