Scala اسئلة واجوبة المقابلات
سؤال 6. What are the advantages of using the 'Option' type over null in Scala?
Using 'Option' type forces the developer to handle the absence of a value explicitly, reducing the likelihood of null pointer exceptions. It leads to safer and more robust code.
سؤال 7. Explain the 'yield' keyword in the context of Scala collections.
In the context of Scala collections, 'yield' is used within a 'for' comprehension to produce elements for the resulting collection. It is often used for transforming and filtering data.
سؤال 8. What is the 'View' in Scala collections?
The 'View' in Scala collections provides a lazy and non-strict version of a collection. It allows you to create a lightweight view on a collection without creating a new data structure.
سؤال 9. How does Scala support multiple inheritance?
Scala supports multiple inheritance through the use of traits. A class can extend multiple traits, allowing it to inherit behavior from each of them.
سؤال 10. What is the purpose of the 'withFilter' method in Scala?
The 'withFilter' method is used in conjunction with 'for' comprehensions to enable lazy filtering of elements in a collection. It is similar to 'filter' but is evaluated lazily.
الاكثر فائدة حسب تقييم المستخدمين:
- What is a higher-order function?
- Explain the 'yield' keyword in Scala.
- Explain the difference between val and var in Scala.
- What is the purpose of the 'case' keyword in Scala?
- What are the advantages of using the 'Option' type over null in Scala?