Explore topic-wise MCQs in General Awareness.

 <?php $cars = array("Volvo", "BMW", "Toyota", "Honda", "Mercedes", "Opel"); print_r(array_chunk($cars, 2)); ?>  

 <?php $fname = array("Peter", "Ben", "Joe"); $age = array("35", "37", "43"); $c = array_combine($fname, $age); print_r($c); ?>  

 <?php $a = array("A", "Cat", "Dog", "A", "Dog"); print_r(array_count_values($a)); ?>  

 <?php $a1 = array("a"=>"red", "b"=>"green", "c"=>"blue", "d"=>"yellow"); $a2 = array("e"=>"red", "f"=>"green", "g"=>"blue"); $result = array_diff($a1, $a2); print_r($result); ?>  

  <?php function calc($price, $tax) { $total = $price + $tax; } $pricetag = 15; $taxtag = 3; calc($pricetag, $taxtag); ?>  

  <?php function calc($price, $tax="") { $total = $price + ($price * $tax); echo "$total"; } calc(42); ?>  

  <?php function a() { function b() { echo 'I am b'; } echo 'I am a'; } a(); a(); ?>  

  <?php $state = array ("Karnataka", "Goa", "Tamil Nadu", "Andhra Pradesh"); echo (array_search ("Tamil Nadu", $state) ); ?>  

  <?php $fruits = array ("apple", "orange", "banana"); echo (next($fruits)); echo (next($fruits)); ?>  

  <?php $fruits = array ("apple", "orange", array ("pear", "mango"), "banana"); echo (count($fruits, 1)); ?>  

  <?php $cars = array("Volvo", "BMW", "Toyota"); echo "I like " . $cars[2] . ", " . $cars[1] . " and " . $cars[0] . "."; ?>  

  <?php $fname = array("Peter", "Ben", "Joe"); $age = array("35", "37", "43"); $c = array_combine($age, $fname); print_r($c); ?>  

  <?php $a=array("A","Cat","Dog","A","Dog"); $b=array("A","A","Cat","A","Tiger"); $c=array_combine($a,$b); print_r(array_count_values($c)); ?>  

  <?php $a1 = array("red", "green"); $a2 = array("blue", "yellow"); $a3 = array_merge($a1, $a2); $a4 = array("a", "b", "c", "d"); $a = array_combine($a4, $a3); print_r($a); ?>  

  <?php $a1 = array("a" => "red", "b" => "green", "c" => "blue", "d" => "yellow"); $a2 = array("e" => "red", "f" => "green", "g" => "blue", "h" => "orange"); $a3 = array("i" => "orange"); $a4 = array_combine($a2, $a3); $result = array_diff($a4, $a2); print_r($result); ?>  

  <?php $a1 = array_fill(1, 4, "hello"); $b1 = array_fill(5, 1, "php"); $a2 = array_merge($a1, $a2); print_r($a2); echo "
"; print_r($b1); ?>  

  <?php $names = array("Sam", "Bob", "Jack"); echo $names[0] . "is the brother of " . $names[1] . " and " . $names[1] . "."; ?>  

  <?php $names = array("Sam", "Bob", "Jack"); echo $names[0] . "is the brother of " . $names[1] . " and " . $names[1] . ".".$brother; ?>  

  <?php $place = array("NYC", "LA", "Paris"); array_pop($place); $place1 = array("Paris"); $place = array_merge($place, $place1); print_r($place); ?>  

  <?php $op2 = "blabla"; function foo($op1) { echo $op1; echo $op2; } foo("hello"); ?>  

  <?php function foo($msg) { echo "$msg"; } $var1 = "foo"; $var1("will this work"); ?>  

  <?php $states = array("karnataka" => array ( "population" => "11,35,000", "capital" => "Bangalore"), "Tamil Nadu" => array( "population" => "17,90,000", "capital" => "Chennai") ); echo $states["karnataka"]["population"]; ?>  

 class multithreaded_programing { public static void main(String args[]) { Thread t = Thread.currentThread(); t.setName("New Thread"); System.out.println(t); } } 

 class multithreaded_programing { public static void main(String args[]) { Thread t = Thread.currentThread(); t.setName("New Thread"); System.out.println(t.getName()); } } 

 class multithreaded_programing { public static void main(String args[]) { Thread t = Thread.currentThread(); System.out.println(t); } } 

 class multithreaded_programing { public static void main(String args[]) { Thread t = Thread.currentThread(); System.out.println(t); } } 

 class multithreaded_programing { public static void main(String args[]) { Thread t = Thread.currentThread(); System.out.println(t); } } 

 public class Demo { public static void main(String[] args) { Map sampleMap = new TreeMap(); sampleMap.put(1, null); sampleMap.put(5, null); sampleMap.put(3, null); sampleMap.put(2, null); sampleMap.put(4, null); System.out.println(sampleMap); } }  

 class MyThread extends Thread { public static void main(String [] args) { MyThread t = new MyThread(); /* Line 5 */ t.run(); /* Line 6 */ } public void run() { for(int i=1; i < 3; ++i) { System.out.print(i + ".."); } } } 

 class Test116 { static final StringBuffer sb1 = new StringBuffer(); static final StringBuffer sb2 = new StringBuffer(); public static void main(String args[]) { new Thread() { public void run() { synchronized(sb1) { sb1.append("A"); sb2.append("B"); } } }.start(); new Thread() { public void run() { synchronized(sb1) { sb1.append("C"); sb2.append("D"); } } }.start(); /* Line 28 */ System.out.println (sb1 + " " + sb2); } } 

 public class ThreadTest extends Thread { public void run() { System.out.println("In run"); yield(); System.out.println("Leaving run"); } public static void main(String []argv) { (new ThreadTest()).start(); } } 

 class s1 extends Thread { public void run() { for(int i = 0; i < 3; i++) { System.out.println("A"); System.out.println("B"); } } } class Test120 extends Thread { public void run() { for(int i = 0; i < 3; i++) { System.out.println("C"); System.out.println("D"); } } public static void main(String args[]) { s1 t1 = new s1(); Test120 t2 = new Test120(); t1.start(); t2.start(); } } 

 class s implements Runnable { int x, y; public void run() { for(int i = 0; i < 1000; i++) synchronized(this) { x = 12; y = 12; } System.out.print(x + " " + y + " "); } public static void main(String args[]) { s run = new s(); Thread t1 = new Thread(run); Thread t2 = new Thread(run); t1.start(); t2.start(); } } 

 public class ThreadDemo { private int count = 1; public synchronized void doSomething() { for (int i = 0; i < 10; i++) System.out.println(count++); } public static void main(String[] args) { ThreadDemo demo = new ThreadDemo(); Thread a1 = new A(demo); Thread a2 = new A(demo); a1.start(); a2.start(); } } class A extends Thread { ThreadDemo demo; public A(ThreadDemo td) { demo = td; } public void run() { demo.doSomething(); } } 

 public class WaitTest { public static void main(String [] args) { System.out.print("1 "); synchronized(args) { System.out.print("2 "); try { args.wait(); /* Line 11 */ } catch(InterruptedException e){ } } System.out.print("3 "); } } 

1. Extend java.lang.Thread and override the run() method.
2. Extend java.lang.Runnable and override the start() method.
3. Implement java.lang.Thread and implement the run() method.
4. Implement java.lang.Runnable and implement the run() method.
5. Implement java.lang.Thread and implement the start() method.

1. Deadlock will not occur if wait()/notify() is used
2. A thread will resume execution as soon as its sleep duration expires.
3. Synchronization can prevent two objects from being accessed by the same thread.
4. The wait() method is overloaded to accept a duration.
5. The notify() method is overloaded to accept a duration.
6. Both wait() and notify() must be called from a synchronized context.

Runnable target = new MyRunnable();
Thread myThread = new Thread(target);

Which of the following classes can be used to create the target, so that the preceding code compiles correctly?

 class newthread extends Thread { Thread t; String name; newthread(String threadname) { name = threadname; t = new Thread(this,name); t.start(); } public void run() { } } class multithreaded_programing { public static void main(String args[]) { newthread obj1 = new newthread("one"); newthread obj2 = new newthread("two"); try { obj1.t.wait(); System.out.print(obj1.t.isAlive()); } catch(Exception e) { System.out.print("Main thread interrupted"); } } } 

 class newthread extends Thread { Thread t; String name; newthread(String threadname) { name = threadname; t = new Thread(this,name); t.start(); } public void run() { } } class multithreaded_programing { public static void main(String args[]) { newthread obj1 = new newthread("one"); newthread obj2 = new newthread("two"); try { Thread.sleep(1000); System.out.print(obj1.t.isAlive()); } catch(InterruptedException e) { System.out.print("Main thread interrupted"); } } } 

 class newthread extends Thread { Thread t; newthread() { t = new Thread(this,"New Thread"); t.start(); } public void run() { System.out.println(t.isAlive()); } } class multithreaded_programing { public static void main(String args[]) { new newthread(); } } 

 class newthread extends Thread { Thread t1,t2; newthread() { t1 = new Thread(this,"Thread_1"); t2 = new Thread(this,"Thread_2"); t1.start(); t2.start(); } public void run() { t2.setPriority(Thread.MAX_PRIORITY); System.out.print(t1.equals(t2)); } } class multithreaded_programing { public static void main(String args[]) { new newthread(); } } 

i. URL rewriting

ii. Using session object

iii.Using response object

iv. Using hidden fields

v. Using cookies

vi. Using servlet object

 import java.awt.*; import java.applet.*; public class myapplet extends Applet { Graphic g; g.drawString("A Simple Applet",20,20); }  

 import java.lang.reflect.*; class Additional_packages { public static void main(String args[]) { try { Class c = Class.forName("java.awt.Dimension"); Method methods[] = c.getMethods(); for (int i = 0; i < methods.length; i++) System.out.println(methods[i]); } catch (Exception e) { System.out.print("Exception"); } } }  

 import java.util.*; class Collection_iterators { public static void main(String args[]) { LinkedList list = new LinkedList(); list.add(new Integer(2)); list.add(new Integer(8)); list.add(new Integer(5)); list.add(new Integer(1)); Iterator i = list.iterator(); Collections.reverse(list); Collections.sort(list); while(i.hasNext()) System.out.print(i.next() + " "); } }  

 import java.util.*; class LOCALE_CLASS { public static void main(String args[]) { Locale obj = new Locale("URDU") ; System.out.print(obj.getDisplayLanguage()); }  

 import java.util.*; class Collection_iterators { public static void main(String args[]) { LinkedList list = new LinkedList(); list.add(new Integer(2)); list.add(new Integer(8)); list.add(new Integer(5)); list.add(new Integer(1)); Iterator i = list.iterator(); Collections.reverse(list); Collections.shuffle(list); i.next(); i.remove(); while(i.hasNext()) System.out.print(i.next() + " "); } }  

 import java.util.*; class LOCALE_CLASS { public static void main(String args[]) { Locale obj = new Locale("URDU", "PAKISTAN") ; System.out.print(obj.getDisplayLanguage()); } }