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Core Java - Interview Questions and Answers for 'Yes no' - 9 question(s) found - Order By Rating

 Q1. Are there any global variables in Java, which can be accessed by other part of your program?
Ans. No. Global variables are not allowed as it wont fit good with the concept of encapsulation.

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   Like         Discuss         Correct / Improve     java   variables   global variables   yes no

 Q2. Does a class inherit the constructor of its super class?
Ans. No.

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   Like         Discuss         Correct / Improve     java   oops   constructor   inheritence   constructor inheritance   yes no

 Q3. Can we call the garbage collector explicitly ?Core Java
Ans. Yes, We can call garbage collector directly but it doesn't guarantees that the gc will start executing immediately. This gc( ) method appears in both Runtime and System classes of java.lang package.

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   Like         Discuss         Correct / Improve     java   garbage collection   java memory management   jvm   gc   yes no     Asked in 4 Companies      expert
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 Q4. Does every class needs to have one non parameterized constructor ?Core Java
Ans. No. Every Class only needs to have one constructor - With parameters or without parameters. Compiler provides a default non parameterized constructor if no constructors is defined.

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   Like         Discuss         Correct / Improve     java   oops   constructor   default constructor   yes no      intermediate
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 Q5. Can we use "this" within static method ? Why ?Core Java
Ans. No. Even though "this" would mean a reference to current object id the method gets called using object reference but "this" would mean an ambiguity if the same static method gets called using Class name.

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   Like         Discuss         Correct / Improve     java   oops   static   this keyword   this   yes no   why questions      intermediate

 Q6. Can try statements be nested?Core Java
Ans. Yes

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   Like         Discuss         Correct / Improve     java   exceptions   try   yes no      basic

 Q7. Will static block for Test Class execute in the following code ?

class Test
{
static
{
System.out.println("Executing Static Block.");
}
public final int param=20;

public int getParam(){
return param;
}
}

public class Demo
{
public static void main(String[] args)
{
System.out.println(new Test().param);
}
}
Ans. Yes.

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   Like         Discuss         Correct / Improve     java   static   static block   final variable   yes no
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 Q8. Should we create system software ( e.g Operating system ) in Java ?Core Java
Ans. No, Java runs on a virtual machine called JVM and hence doesn't embed well with the underlying hardware. Though we can create a platform independent system software but that would be really slow and that's what we would never need.

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   Like         Discuss         Correct / Improve     java   system software java   jvm   yes-no   yes no   java operating system   architecture

 Q9. Does Kafka uses ZooKeeper ?
Ans. Yes

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   Like         Discuss         Correct / Improve     kafka   bigdata   yes-no   yes no

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