7hillsTS Interview Questions and Answers

Mutable objects can be modified after creation, while immutable objects cannot be modified.

• Mutable objects can have their state changed, while immutable objects cannot.

• Immutable objects are thread-safe, while mutable objects may require synchronization.

• Examples of mutable objects include lists, sets, and dictionaries, while examples of immutable objects include strings, numbers, and tuples.

Yes, indexing can be used in dictionaries.

• Dictionaries in Python support indexing using keys.

• You can access the value associated with a key by using the key as an index.

• Indexing in dictionaries is efficient as it uses hash tables for key-value lookup.

• Example: my_dict = {'name': 'John', 'age': 25}; print(my_dict['name']) will output 'John'.

Visual Studio Code

• Free and open-source code editor

• Supports multiple programming languages

• Has a large library of extensions

• Integrates with Git for version control

Smoke testing is a preliminary testing to check if the software build is stable enough for further testing.

• Smoke testing is a type of non-exhaustive testing

• It is performed to ensure that the critical functionalities of the software are working fine

• It is usually done after a new build is received

• It helps in identifying the major issues early in the testing cycle

• Example: Checking if the login page is working fine after a

Regression testing is testing the entire system after changes while retesting is testing only the failed test cases.

• Regression testing is done to ensure that changes made to the system do not affect the existing functionality.

• Retesting is done to ensure that the defects found in the previous test cycle have been fixed.

• Regression testing is done after every build while retesting is done after every defect fix.

• Regression...read more

Testing is important to ensure software quality and prevent defects.

• Identifies defects and errors in software

• Ensures software meets requirements and specifications

• Improves software quality and reliability

• Reduces the risk of software failure and downtime

• Saves time and money by catching issues early

• Increases customer satisfaction and trust

• Examples: testing user interfaces, functionality, performance, security

Testing methods / stages include unit testing, integration testing, system testing, acceptance testing, and regression testing.

• Unit testing: testing individual units or components of the software

• Integration testing: testing how different units or components work together

• System testing: testing the entire system as a whole

• Acceptance testing: testing to ensure the software meets the requirements and is ready for release

• R...read more

Defect leakage can be handled by identifying the root cause, fixing the issue, and implementing preventive measures.

• Identify the root cause of the defect leakage

• Fix the issue causing the defect leakage

• Implement preventive measures to avoid future defect leakage

• Conduct thorough testing to ensure the defect has been resolved

• Communicate the resolution and preventive measures to the team and stakeholders