Java Miscellaneous Online Test Series 1 | Core Java Quiz | Java Online Test

The String class is declared as

Inheritance provides ________________ .

If we apply instanceof method on the variable that have null value, it will return

What about the Package class?

The java compiler creates the default constructor of the class always.

If we have private method in class, there is

In java4, System.out.println(“A”+”B”);

In the Java SE 6 platform, what key tuning option(s) are needed to achieve high performance?

We can create the multiple objects by one type only

The instance method of the class gets memory everytime, we create the instance of the class

Which pair of keywords must you use when invoking a method that might throw an exception?

What is the main function of any variable ?

Which of the following statements are true about the default implementation of the public int hashCode() method of the Object class?

Booleans are _______.

What will be the value of “num” after the following statements?
int num;
num = (5+4);
num = num / 9;
num = 12;

The exception that raises by not initializing a component in the panel is:

What is Java (in regard to Computer Science) ?

which of the following classes are available in the java.lang package?

What is an assignment statement

The Java SE 6 platform delivers a technology that can greatly improve performance by reducing unnecessary synchronization overhead. It allows a thread to lock and unlock an object with minimal use of atomic operations. What is this technology called?