Should I know JavaScript before learning React Native?

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Shibaji Debnath

IT Professional Trainer with 15 years of experience in IT Industry

Yes, JavaScript Learning is essential.
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public class X { public static void main(String [] args) { X x = new X(); X x2 = m1(x); /* Line 6 */ X x4 = new X(); x2 = x4; /* Line 8 */ doComplexStuff(); } static X m1(X mx) { mx = new X(); return mx; } } After line 8 runs. how many objects are eligible for garbage collection?
Only one. After line 8 the original object referred to by x2 is dereferenced and ready for garbage collection. In m1(), mx ignores the object passed as argument and refers to a new object which is returned.
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What is an Exception in Java?
We can Say Exception is an event which terminates the normal execution of a program
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What is a singleton class and when do you use it?
Singleton class have a private constructor. while we can't create an object from outside of class, we can create an object only once.
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Hi, Can anyone help me on below queries? 1. What makes a class as "Thread safe class" ? 2. equals() method uses 3. Difference between String vs StringBuffer ?
There are three ways to construct thread-safe Java class which has some state: 1. Make it truly immutable 2.Make field volatile. 3.Use a synchronized block
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What are the qualities of a good Java trainer?
Good java trainers are always teaching their students with practical examples. This exactly happens in BEE Apprentice, our trainers are working in MNCs hence they are updated with technology and are best trainers.
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