Object Oriented Programming
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What is the output?
public class Demo implements Runnable{ public static void main(String args[]) { Runnable t = new Demo(); t.start(); } public void run() { System.out.println("Task"); }}
/**/
document.oncopy = new Function("return false");
document.onpaste = new Function("return false");
document.onselectstart = new Function("return false");
document.oncontextmenu = new Function("return false"); /**/
What is the output?
public class Demo{ public static void main(String args[]){ try{ int a[]=new int[5]; a[5]=30/0; } catch(Exception e){System.out.println("C1");} catch(ArithmeticException e){System.out.println("C2");} catch(ArrayIndexOutOfBoundsException e){System.out.println("C3");} System.out.println("Output"); } }
/**/
document.oncopy = new Function("return false");
document.onpaste = new Function("return false");
document.onselectstart = new Function("return false");
document.oncontextmenu = new Function("return false"); /**/
What is the output?
public class Demo{ void m(){ int x = 50/0; System.out.println("1"); } void n(){ m(); System.out.println("2"); } void p(){ try{ n(); }catch(Exception e){System.out.println("3");} } public static void main(String args[]){ Demo obj=new Demo(); obj.p(); System.out.println("4"); } }
/**/
document.oncopy = new Function("return false");
document.onpaste = new Function("return false");
document.onselectstart = new Function("return false");
document.oncontextmenu = new Function("return false"); /**/
What happens if run() is called directly instead of start() in Java threads?
/**/
document.oncopy = new Function("return false");
document.onpaste = new Function("return false");
document.onselectstart = new Function("return false");
document.oncontextmenu = new Function("return false"); /**/
What is the output?
public class Outer { public static void method() { interface IF { void greet(); System.out.println("Hi"); } class Inner implements IF { public void greet() { System.out.println("Hello"); } } Inner in = new Inner(); in.greet(); } public static void main(String[] args) { method(); System.out.println("Bye"); }}
/**/
document.oncopy = new Function("return false");
document.onpaste = new Function("return false");
document.onselectstart = new Function("return false");
document.oncontextmenu = new Function("return false"); /**/
What is the output?
public class Outer { public void method() { class Inner { static final String a = "Hello"; public void greet() { System.out.println(a); } } new Inner().greet(); } public static void main(String[] args) { new Outer().method(); System.out.println("Bye"); }}
/**/
document.oncopy = new Function("return false");
document.onpaste = new Function("return false");
document.onselectstart = new Function("return false");
document.oncontextmenu = new Function("return false"); /**/
What does the T in class Demo<T> {} represent?
document.oncopy = new Function("return false");
document.onpaste = new Function("return false");
document.onselectstart = new Function("return false");
document.oncontextmenu = new Function("return false");
// Disable copy, paste, text selection, and right-click context menu
document.oncopy = new Function("return false");
document.onpaste = new Function("return false");
document.onselectstart = new Function("return false");
document.oncontextmenu = new Function("return false");
// Prevent new tab and new window shortcuts
window.addEventListener("keydown", function(event) {
if ((event.ctrlKey && event.key === 't') || (event.ctrlKey && event.key === 'n')) {
event.preventDefault();
alert("Opening a new tab or window is not allowed during the quiz.");
// Close the current tab or new window immediately
window.close();
}
});
// Detect and close the tab if the user tries to switch away from it
document.addEventListener("visibilitychange", function() {
if (document.visibilityState === "hidden") {
alert("Please stay on this tab to complete the quiz.");
// Reload the page if user tries to leave the tab
location.reload();
}
});
// Block certain key combinations for opening developer tools
window.addEventListener("keydown", function(event) {
if ((event.ctrlKey && event.shiftKey && event.key === 'i') || // Ctrl+Shift+I
(event.ctrlKey && event.shiftKey && event.key === 'j') || // Ctrl+Shift+J
(event.ctrlKey && event.shiftKey && event.key === 'c') || // Ctrl+Shift+C
(event.ctrlKey && event.key === 'u')) { // Ctrl+U
event.preventDefault();
alert("Developer tools are disabled during the quiz.");
}
});
document.oncopy = new Function("return false");
document.onpaste = new Function("return false");
document.onselectstart = new Function("return false");
document.oncontextmenu = new Function("return false");
What are generic methods?
/**/
document.oncopy = new Function("return false");
document.onpaste = new Function("return false");
document.onselectstart = new Function("return false");
document.oncontextmenu = new Function("return false"); /**/
/**/
document.oncopy = new Function("return false");
document.onpaste = new Function("return false");
document.onselectstart = new Function("return false");
document.oncontextmenu = new Function("return false"); /**/
In which line do you find an anonymous object being created?
class Student {public class MyClass { public static void main(String args[]) { Student obj = new Student(); //Line-1 Student obj1 = new Student(), obj2 = new Student(); //Line-2 new Student(); //Line-3 }}
/**/
document.oncopy = new Function("return false");
document.onpaste = new Function("return false");
document.onselectstart = new Function("return false");
document.oncontextmenu = new Function("return false"); /**/
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