Tag: programming languages

Quizzes (351) Questions (7021)

Questions Related to programming languages

Multiple choice technology programming languages

Given: 

public static void before() {
    Set set = new TreeSet();
    set.add("2");
    set.add(3);
    set.add("1");
    Iterator it = set.iterator();
    while (it.hasNext())    System.out.print(it.next() + " ");
}

Which statements are true?

  1. The before() method will print 1 2

  2. The before() method will print 1 2 3

  3. The before() method will print three numbers, but the order cannot be determined

  4. The before() method will not compile

  5. The before() method will throw exception at runtime
Reveal answer Fill a bubble to check yourself
E Correct answer
Full explanation
Multiple choice technology programming languages

Given: 


import java.util.*;   
public class Magellan {   
  public static void main(String[] args) {   
    TreeMap myMap = new TreeMap();   
    myMap.put("a", "apple"); myMap.put("d", "date");   
    myMap.put("f", "fig"); myMap.put("p", "pear");   
    System.out.println("1st after mango: " +   // sop 1  
       myMap.higherKey("f"));  
     System.out.println("1st after mango: " +   // sop 2  
       myMap.ceilingKey("f"));  
     System.out.println("1st after mango: " +   // sop 3  
       myMap.floorKey("f"));  
     SortedMap sub = new TreeMap();  
     sub = myMap.tailMap("f");  
     System.out.println("1st after mango: " +   // sop 4  
       sub.firstKey());  
   }  
 }

Which of the System.out.println statements will produce the output 1st after mango: p?

  1. sop 1

  2. sop 2

  3. sop 3

  4. sop 4

  5. compilation fails
Reveal answer Fill a bubble to check yourself
A Correct answer
Full explanation
Multiple choice technology programming languages

Given: 

class TKO {
    public static void main(String[] args) {
        String s = "-";
        Integer x = 343;
        long L343 = 343L;
        if(x.equals(L343))  s += ".e1 ";
        if(x.equals(343))  s += ".e2 ";
        Short s1 = (short)((new Short((short)343)) / (new Short((short)49)));
        if(s1 == 7)        s += "=s ";
        if(s1 < new Integer(7+1))  s += "fly ";
        System.out.println(s);
    }
}

Which of the following will be included in the output String s? (Choose all that apply.)

  1. .e1

  2. .e2

  3. =s

  4. fly
Reveal answer Fill a bubble to check yourself
B,C,D Correct answer
Full explanation