Java Interview Questions SET-01
Java Interview Questions Set-02 ARRAY
Java Interview Questions Set-03 MAP
Java Interview Question Set-04
💛Best Practices Exception Handling 💚
Exception handling is crucial in test automation to handle unexpected errors.
👉Use try-catch blocks, assert statements, or custom exceptions tailored to specific errors for better control.
👉For instance, catch a NoSuchElementException gracefully, display relevant messages, or implement retries.
👉Improve your test scripts' resilience and maintainability with robust exception handling!
⛔️Code Examples
try {
// Your code that might raise an exception
WebElement element = driver.findElement(By.xpath("//some/xpath"));
element.click();
} catch (NoSuchElementException e) {
// Handle the specific exception
System.out.println("Element not found: " + e.getMessage());
// Add recovery action or log for further analysis
// For example, you can retry the operation or log the error
}
⛔️Best Practices for Writing Try-Catch Blocks in Java:
👉Specificity is Key:
Catch specific exceptions rather than using a generic Exception block. This allows for targeted handling of different errors, enhancing code readability and maintainability.
👉Keep it Concise:
Only include code within the try-catch block that is susceptible to exceptions. Avoid placing large portions of code within the block to maintain focus on error-prone areas.
👉Log and Report:
Utilize logging mechanisms within the catch block to record details about the exception. This aids in troubleshooting and provides valuable insights into the root cause of issues during test execution.
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SDET Interview Question and Answers
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Jenkins Interview Questions and Answers
In Java, "error" and "exception" are two distinct concepts that represent different types of issues in a program.
1. Error:
- Definition:
- Errors in Java represent severe problems that are typically beyond the control of the programmer. They are exceptional conditions that should not be caught or handled under normal circumstances.
- Examples:
- Examples of errors include
OutOfMemoryError(indicating insufficient memory to run the application) orStackOverflowError(caused by a stack overflow). - Handling:
- Errors are not meant to be caught or handled by the application. When an error occurs, it usually indicates a critical and unrecoverable problem, and the application is likely to terminate.
2. Exception:
- Definition:
- Exceptions in Java represent exceptional conditions that a program should catch and handle. They are events that occur during the execution of a program that disrupt the normal flow of instructions.
- Examples:
- Examples of exceptions include
NullPointerException(attempting to access a null object reference) orFileNotFoundException(attempting to open a file that does not exist). - Handling:
- Exceptions are meant to be caught and handled by the programmer. Java provides a mechanism using
try,catch, andfinallyblocks to handle exceptions. This allows the program to gracefully respond to unexpected situations and continue its execution.
Summary:
- - Errors are severe issues beyond the programmer's control, and they are not meant to be caught or handled.
- - Exceptions are exceptional conditions that should be caught and handled to ensure the program's graceful execution.
- - Both errors and exceptions extend the
Throwableclass in Java, forming the basis for Java's exception handling mechanism.
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SDET Interview Question and Answers
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