Accenture Senior Software Tester Interview Questions, Process, and Tips

HashMap is non-synchronized and allows null values, while Hashtable is synchronized and does not allow null values.

• HashMap is non-synchronized and not thread-safe, while Hashtable is synchronized and thread-safe.

• HashMap allows null values for both key and value, while Hashtable does not allow null keys or values.

• HashMap is faster than Hashtable as it is non-synchronized.

• HashMap is part of the Java Collections Framework

Types of exceptions in Selenium include NoSuchElementException, ElementNotVisibleException, StaleElementReferenceException, TimeoutException, and WebDriverException.

• NoSuchElementException: Thrown when an element could not be found in the DOM.

• ElementNotVisibleException: Thrown when an element is present in the DOM but not visible.

• StaleElementReferenceException: Thrown when an element is no longer attached to the DOM.

• Tim...read more

Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.

• Abstract class can have constructors, fields, and non-abstract methods, while interface cannot.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Abstract classes are used to define a common behavior for subclasses, while interfaces are used to define a contract for classes ...read more

SQL queries are used to interact with relational databases by retrieving, updating, and manipulating data.

• Use SELECT statement to retrieve data from tables

• Use INSERT statement to add new data to tables

• Use UPDATE statement to modify existing data in tables

• Use DELETE statement to remove data from tables

• Use JOIN clause to combine data from multiple tables