Java Programming Interview Questions for Automation Testing with Answers 2024
Comprehensive Java Automation Testing Interview Questions and Answers 2024
Java Programming Interview Questions for Automation Testing with Answers 2024
In a Java programming interview for automation testing in 2024, expect questions on topics such as object-oriented programming concepts, Java collections, exception handling, and multithreading. Interviewers may also inquire about Java frameworks commonly used in automation testing, like Selenium or Appium. Other potential areas of focus might include Java 8 features, API testing using RestAssured, and testing frameworks such as TestNG or JUnit. Be prepared to explain your automation testing frameworks, your experience with test automation design patterns, and how you approach debugging and troubleshooting in Java. Practice coding exercises related to these topics and be ready to showcase your problem-solving skills and knowledge of Java best practices during the interview.
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1 - What is Java programming language?
Java is a widely used programming language that is platform independent, which means it can run on any platform that supports Java without the need for recompilation.
2) What are the main features of Java?
Object oriented: Java is an object oriented language, which means it focuses on objects that can contain data and code.
Platform independent: Java code can be run on any platform that supports Java Virtual Machine (JVM).
Simple: Java has a simple syntax and is easy to learn and use.
Secure: Java has built in security features to protect against harmful viruses and malware.
Robust: Java has strong memory management and automatic garbage collection.
Multithreaded: Java supports concurrent programming by allowing multiple threads to run simultaneously.
3) What is the difference between == and equals() method in Java?
The “==” operator is used to compare the reference of two objects, while the equals() method is used to compare the content or values of two objects.
4) What is the difference between HashMap and HashTable in Java?
HashMap is not synchronized (not thread safe) and allows null values and keys, while HashTable is synchronized (thread safe) and does not allow null values and keys.
5) What is polymorphism in Java?
Polymorphism in Java allows objects to take on multiple forms. This can be achieved through method overriding or method overloading.
6) What is an interface in Java?
An interface in Java is like a blueprint of a class that contains only abstract methods and constants. A class implements an interface and provides the implementation for its methods.
7) What is the importance of exception handling in Java?
Exception handling in Java is important for handling unexpected errors that may occur during program execution. It helps in identifying and dealing with errors gracefully.
8) What is the difference between composition and inheritance in Java?
Inheritance allows a class to inherit the properties and behavior of another class, while composition allows a class to contain an object of another class as a member.
9) What is the use of the ‘static’ keyword in Java?
The ‘static’ keyword in Java is used to create class level variables and methods that can be accessed without creating an object of the class.
10) What is the purpose of the ‘final’ keyword in Java?
The ‘final’ keyword in Java is used to declare constants, prevent method overriding, and prevent class inheritance.
11) What are some commonly used libraries or frameworks in Java for automation testing?
Some commonly used libraries/frameworks for automation testing in Java include Selenium, TestNG, JUnit, Cucumber, and Apache JMeter.
12) How do you handle dynamic elements in Selenium WebDriver?
Dynamic elements in Selenium WebDriver can be handled using techniques like XPath or CSS selectors that can uniquely identify the element even if its attributes change.
13) What is the difference between driver.findElement() and driver.findElements() in Selenium WebDriver?
driver.findElement() returns the first matching element found on the web page, while driver.findElements() returns a list of all matching elements found on the web page.
14) How do you handle pop up windows in Selenium WebDriver?
Pop up windows in Selenium WebDriver can be handled using the Alert class to accept, dismiss, or get text from the pop up.
15) Can you execute JavaScript code in Selenium WebDriver? If yes, how?
Yes, JavaScript code can be executed in Selenium WebDriver using executeScript() method provided by WebDriver's JavascriptExecutor interface.
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