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[VV98] Spring certification feedback, James Gosling retired, Paths, Visitor pattern, KafkaUI, job matching poll, Power of less, emotion reaction
?????Feedback on Spring certification with tips to pass it:
??? Java founder, James Gosling, is retiring
James Gosling said:
I've finally retired. After a crazy number of years as a software engineer, it's time for me to just have fun. The last 7 years at Amazon have been great, despite COVID-19 and industrial craziness. I've got a long list of side projects to plough through. It'll be fun.
???JAVA CERTIFICATION QUESTION: Paths first chunk
What is the output of the following snippet? (Assume the file exists)
Path path = Paths.get("C:\\home\\joe\\foo");
System.out.println(path.getName( 0 ));
* C
* C:
* home
* IllegalArgumentException
* Compilation error
#java #certificationquestion #ocp
Answer: home
getName(0) Returns the path element corresponding to the specified index.
The 0th element is the path element closest to the root.
Path getName(int index)
Returns a name element of this path as a Path object.
The index parameter is the index of the name element to return. The element that is closest to the root in the directory hierarchy has index 0. The element that is farthest from the root has index count-1.
Parameters:
index - the index of the element
Returns:
the name element
Throws:
IllegalArgumentException - if index is negative, index is greater than or equal to the number of elements, or this path has zero name elements
??? QUOTE
?? DESIGN PATTERN: The Quiz !
The ____ Pattern is a design pattern that lets you add new operations to objects without changing their class structures.
It separates the algorithm from the objects and enables dynamic dispatch of operations based on object types.
* Mediator
* Interpreter
* Visitor
* Observer
#programming #design #pattern
Answer: Visitor
The Visitor Pattern is a behavioral design pattern in software development that allows you to add new operations to objects without changing their class structures. It achieves this by separating the algorithm (visitor) from the objects on which it operates, enabling dynamic dispatch of the operation based on the object's type.
Key components of the Visitor Pattern:
Visitor:
The Visitor is an interface or abstract class that defines a set of visit methods, each corresponding to a different type of object. Concrete visitor classes implement these methods to perform specific operations on objects.
Element:
The Element is an interface or abstract class that declares an accept method.
Concrete element classes implement this method and accept a visitor as an argument.
The accept method dispatches the visit operation to the appropriate visitor method.
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Concrete Visitor:
Concrete Visitor classes are specific implementations of the visitor interface.
Each concrete visitor provides the logic for the visit methods associated with different element types.
Concrete Element:
Concrete Element classes are specific implementations of the element interface.
They implement the accept method to call the appropriate visitor's visit method.
Object Structure:
The Object Structure represents a collection of elements and provides methods for adding, removing, or iterating over them.
It's the entry point for initiating visitor operations on its elements.
The Visitor Pattern is beneficial in scenarios where you need to add new operations or behaviors to a set of objects without modifying their class hierarchy.
It promotes maintainability, extensibility, and the ability to work with complex object structures.
It's commonly used in compilers, abstract syntax trees, and various data processing applications.
?? Introducing KafkaUI: The Ultimate GUI for Apache Kafka Management ??
What is KafkaUI? ??
Capabilities of KafkaUI ???
Advantages of Using KafkaUI ??
Setting Up KafkaUI ??
Conclusion ??
Key Takeaways ??
#kafka #kafkaui #introduction
POLL?? As a candidate, do you apply for a job only when you match 100% of the requirements? YES/ NO
Options:
? Yes, only if I meet all.
?? No, I still apply.
#programming #job #requirement #full #matching #poll
The power of less ??
Many companies succeed not by adding delight to our lives, but by removing ? some kind of pain.
With its live tracking function??, Uber removed the uncertainty of waiting for a taxi.
? Instead of adding a positive to your customers’ lives, think of removing a negative.
#teamwork #pain #removal
Is nothing going according to plan? ??
React to the problem?, not to stress?.
When you make the emotion your focus, you get tunnel vision????. And you're prone to poor decisions. ??
To dial down the emotions, you can imagine the challenge is happening to a friend at a different company.??♂?
#teamwork #emotion #reaction
JOKE: The evil jackpot??
The Devil's Coding Creation
One day, the devil approaches God with a mischievous grin.
"Come on, God, just let me create one thing!" the devil pleads.
God sighs, exasperated. "Oh, for Pete's sake... fine. You can create one thing."
The devil's eyes gleam with satisfaction as he mutters, "Jackpot..."
And that's how YAML was created.
Conclusion and Explanation:
This joke plays on the frustrations many programmers have with YAML (Yet Another Markup Language). YAML, often used for configuration files, can be notoriously tricky due to its sensitivity to whitespace and indentation errors. By attributing its creation to the devil, the joke humorously suggests that YAML's complexity and potential for causing headaches are so diabolical that they must have been invented by the devil himself.