Core Java اسئلة واجوبة المقابلات
Test your skills through the online practice test: Core Java Quiz Online Practice Test
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سؤال 216. How many static init can you have ?
As many as you want, but the static initializers and class variable initializers are executed in textual order and may not refer to class variables declared in the class whose declarations appear textually after the use, even though these class variables are in scope.
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سؤال 217. What is mutable object and immutable object?
If a object value is changeable then we can call it as Mutable object. (Ex., StringBuffer, ') If you are not allowed to change the value of an object, it is immutable object. (Ex., String, Integer, Float, ')
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سؤال 218. What is the basic difference between string and stringbuffer object?
String is an immutable object. StringBuffer is a mutable object.
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سؤال 219. What is the byte range?
128 to 127
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سؤال 220. Can a double value be cast to a byte?
Yes, a double value can be cast to a byte.
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الاكثر فائدة حسب تقييم المستخدمين:
- How could Java classes direct program messages to the system console, but error messages, say to a file?
- What are the differences between an interface and an abstract class?
- Why would you use a synchronized block vs. synchronized method?
- How can you force garbage collection?
- What are the differences between the methods sleep() and wait()?