Hexacta Most Frequently Asked Latest Advanced Java Interview Questions Answers
What Is The Difference Between A Menuitem And A Checkboxmenuitem?
The CheckboxMenuItem class extends the MenuItem class to support a menu item that may be checked or unchecked.
What Is A Task's Priority And How Is It Used In Scheduling?
A task's priority is an integer value that identifies the relative order in which it should be executed with respect to other tasks. The scheduler attempts to schedule higher priority tasks before lower priority tasks.
What Class Is The Top Of The Awt Event Hierarchy?
The java.awt.AWTEvent class is the highest-level class in the AWT event-class hierarchy.
When A Thread Is Created And Started, What Is Its Initial State?
A thread is in the ready state after it has been created and started.
Can An Anonymous Class Be Declared As Implementing An Interface And Extending A Class?
An anonymous class may implement an interface or extend a superclass, but may not be declared to do both.
What Is The Immediate Superclass Of Menu?
MenuItem.
What Is The Purpose Of Finalization?
The purpose of finalization is to give an unreachable object the opportunity to perform any cleanup processing before the object is garbage collected.
Which Class Is The Immediate Superclass Of The Menucomponent Class?
Object.
What Invokes A Thread's Run() Method?
After a thread is started, via its start() method or that of the Thread class, the JVM invokes the thread's run() method when the thread is initially executed.
What Is The Difference Between The Boolean & Operator And The && Operator?
If an expression involving the Boolean & operator is evaluated, both operands are evaluated. Then the & operator is applied to the operand. When an expression involving the && operator is evaluated, the first operand is evaluated.
If the first operand returns a value of true then the second operand is evaluated. The && operator is then applied to the first and second operands. If the first operand evaluates to false, the evaluation of the second operand is skipped.
How Are Java Source Code Files Named?
A Java source code file takes the name of a public class or interface that is defined within the file. A source code file may contain at most one public class or interface. If a public class or interface is defined within a source code file, then the source code file must take the name of the public class or interface.
If no public class or interface is defined within a source code file, then the file must take on a name that is different than its classes and interfaces. Source code files use the .java extension.
What Is The Relationship Between The Canvas Class And The Graphics Class?
A Canvas object provides access to a Graphics object via its paint() method.
What Are The High-level Thread States?
The high-level thread states are ready, running, waiting, and dead.
What Value Does Read() Return When It Has Reached The End Of A File?
The read() method returns -1 when it has reached the end of a file.
Can A Byte Object Be Cast To A Double Value?
No. An object cannot be cast to a primitive value.
What Is The Difference Between A Static And A Non-static Inner Class?
A non-static inner class may have object instances that are associated with instances of the class's outer class.
A static inner class does not have any object instances.
What Is The Difference Between The String And Stringbuffer Classes?
String objects are constants. StringBuffer objects are not constants.
If A Variable Is Declared As Private, Where May The Variable Be Accessed?
A private variable may only be accessed within the class in which it is declared.
What Is An Object's Lock And Which Object's Have Locks?
An object's lock is a mechanism that is used by multiple threads to obtain synchronized access to the object. A thread may execute a synchronized method of an object only after it has acquired the object's lock.
All objects and classes have locks. A class's lock is acquired on the class's Class object.
What Is The Dictionary Class?
The Dictionary class provides the capability to store key-value pairs.
How Are The Elements Of A Borderlayout Organized?
The elements of a BorderLayout are organized at the borders (North, South, East, and West) and the center of a container.
What Is The % Operator?
It is referred to as the modulo or remainder operator. It returns the remainder of dividing the first operand by the second operand.
When Can An Object Reference Be Cast To An Interface Reference?
An object reference be cast to an interface reference when the object implements the referenced interface.
What Is The Difference Between A Menuitem And A Checkboxmenuitem?
The CheckboxMenuItem class extends the MenuItem class to support a menu item that may be checked or unchecked.
What Is A Task's Priority And How Is It Used In Scheduling?
A task's priority is an integer value that identifies the relative order in which it should be executed with respect to other tasks. The scheduler attempts to schedule higher priority tasks before lower priority tasks.
What Class Is The Top Of The Awt Event Hierarchy?
The java.awt.AWTEvent class is the highest-level class in the AWT event-class hierarchy.
When A Thread Is Created And Started, What Is Its Initial State?
A thread is in the ready state after it has been created and started.
Can An Anonymous Class Be Declared As Implementing An Interface And Extending A Class?
An anonymous class may implement an interface or extend a superclass, but may not be declared to do both.
What Is The Immediate Superclass Of Menu?
MenuItem.
What Is The Purpose Of Finalization?
The purpose of finalization is to give an unreachable object the opportunity to perform any cleanup processing before the object is garbage collected.
Which Class Is The Immediate Superclass Of The Menucomponent Class?
Object.
What Invokes A Thread's Run() Method?
After a thread is started, via its start() method or that of the Thread class, the JVM invokes the thread's run() method when the thread is initially executed.
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| Hexacta Most Frequently Asked Latest Advanced Java Interview Questions Answers |
What Is The Difference Between The Boolean & Operator And The && Operator?
If an expression involving the Boolean & operator is evaluated, both operands are evaluated. Then the & operator is applied to the operand. When an expression involving the && operator is evaluated, the first operand is evaluated.
If the first operand returns a value of true then the second operand is evaluated. The && operator is then applied to the first and second operands. If the first operand evaluates to false, the evaluation of the second operand is skipped.
How Are Java Source Code Files Named?
A Java source code file takes the name of a public class or interface that is defined within the file. A source code file may contain at most one public class or interface. If a public class or interface is defined within a source code file, then the source code file must take the name of the public class or interface.
If no public class or interface is defined within a source code file, then the file must take on a name that is different than its classes and interfaces. Source code files use the .java extension.
What Is The Relationship Between The Canvas Class And The Graphics Class?
A Canvas object provides access to a Graphics object via its paint() method.
What Are The High-level Thread States?
The high-level thread states are ready, running, waiting, and dead.
What Value Does Read() Return When It Has Reached The End Of A File?
The read() method returns -1 when it has reached the end of a file.
Can A Byte Object Be Cast To A Double Value?
No. An object cannot be cast to a primitive value.
What Is The Difference Between A Static And A Non-static Inner Class?
A non-static inner class may have object instances that are associated with instances of the class's outer class.
A static inner class does not have any object instances.
What Is The Difference Between The String And Stringbuffer Classes?
String objects are constants. StringBuffer objects are not constants.
If A Variable Is Declared As Private, Where May The Variable Be Accessed?
A private variable may only be accessed within the class in which it is declared.
What Is An Object's Lock And Which Object's Have Locks?
An object's lock is a mechanism that is used by multiple threads to obtain synchronized access to the object. A thread may execute a synchronized method of an object only after it has acquired the object's lock.
All objects and classes have locks. A class's lock is acquired on the class's Class object.
What Is The Dictionary Class?
The Dictionary class provides the capability to store key-value pairs.
How Are The Elements Of A Borderlayout Organized?
The elements of a BorderLayout are organized at the borders (North, South, East, and West) and the center of a container.
What Is The % Operator?
It is referred to as the modulo or remainder operator. It returns the remainder of dividing the first operand by the second operand.
When Can An Object Reference Be Cast To An Interface Reference?
An object reference be cast to an interface reference when the object implements the referenced interface.
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