Question 1

What is the output of the below JavaScript?


var bol = new Boolean();        
alert(bol);

technology programming languages

false
true
error
None of the above

Answer

Correct Option: A

Question 2

What is the output of the below JavaScript?


var patt1 = new RegExp("e");        
alert(patt1.test("This is an example"));

technology programming languages

false
true
e
11

Answer

Correct Option: B

Question 3


var patt1 = new RegExp(/e/g);
 alert(patt1.exec("This is an Example"));

technology programming languages

e
E
error
16

Answer

Correct Option: A

Question 4


var str = "This is an Example";
  alert(str.match("example"));

technology programming languages

null
Example
example
error

Answer

Correct Option: A

Question 5


var str = "This is an Example"; 
 alert(str.search("example"));

technology programming languages

11
-1
error
Example

Answer

Correct Option: B

Question 6


    var str = "This is an Example";
    alert(str.replace("Example", "Error"));

technology programming languages

Example
Error
This is an Example
This is an Error

Answer

Correct Option: D

Question 7


var one = ["a", "b"];       
var two = ["c", "d"];       
var three = one.concat(two);        alert(three);

technology programming languages

abcd
a,b,c,d
c,d,a,b
error

Answer

Correct Option: B

Question 8


var one = ["a", "b"];
alert(one.join("&amp;&amp;"));

technology programming languages

a&&b
ab&&
a,b,&&
error

Answer

Correct Option: A

Question 9


var one = ["a", "b", "c"];          
one.pop();          
alert(one);

technology programming languages

a,b
b,c
error
a,b,c

Answer

Correct Option: A

Question 10

What is the output of the below JavaScript?


var one = ["a", "b", "c", "d"];         
alert(one.slice(-2));

technology programming languages

error
a,b
a,b,c,d
c,d

Answer

Correct Option: D

Question 11

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?

technology programming languages

The before() method will print 1 2
The before() method will print 1 2 3
The before() method will print three numbers, but the order cannot be determined
The before() method will not compile
The before() method will throw exception at runtime

Answer

Correct Option: E

Question 12

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?

technology programming languages

sop 1
sop 2
sop 3
sop 4
compilation fails

Explanation:

To solve this question, we need to understand the methods used in the given Java code. TreeMap is a class that implements the Map interface using a tree structure. It stores key-value pairs in a sorted order. The methods used in the given code are:

higherKey(Object key): Returns the least key strictly greater than the given key, or null if there is no such key.
ceilingKey(Object key): Returns the least key greater than or equal to the given key, or null if there is no such key.
floorKey(Object key): Returns the greatest key less than or equal to the given key, or null if there is no such key.
tailMap(K fromKey): Returns a view of the portion of this map whose keys are greater than or equal to fromKey.

Now, let's go through each option and determine which one will produce the output "1st after mango: p":

A. sop 1: This statement calls the higherKey() method on the TreeMap object with the argument "f". This returns the least key strictly greater than "f", which is "p". The output of this statement will be "1st after mango: p". Therefore, option A is correct.

B. sop 2: This statement calls the ceilingKey() method on the TreeMap object with the argument "f". This returns the least key greater than or equal to "f", which is "f" itself. The output of this statement will be "1st after mango: f". Therefore, option B is incorrect.

C. sop 3: This statement calls the floorKey() method on the TreeMap object with the argument "f". This returns the greatest key less than or equal to "f", which is "f" itself. The output of this statement will be "1st after mango: f". Therefore, option C is incorrect.

D. sop 4: This statement creates a new TreeMap object named sub using the tailMap() method on the existing TreeMap object myMap. The tailMap() method returns a view of the portion of this map whose keys are greater than or equal to "f". The sub.firstKey() method returns the first key in the sub map, which is "f". The output of this statement will be "1st after mango: f". Therefore, option D is incorrect.

E. compilation fails: There are no compilation errors in the given code. Therefore, option E is incorrect.

The Answer is: A. sop 1

Answer

Correct Option: A

Question 13

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 &lt; 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.)

technology programming languages

.e1
.e2
=s
fly

Answer

Correct Option: B,C,D

Question 14

Given:

import java.util.regex.*;   
public class Archie {   
  public static void main(String[] args) {   
    Pattern p = Pattern.compile(args[0]);   
    Matcher m = p.matcher(args[1]);   
    int count = 

    while(m.find())  
       count++;  
     System.out.print(count);  
   }  
 }

And given the command line invocation:
java Archie "\d+" ab2c4d67 What is the result?

technology programming languages

0
3
4
8
9

Answer

Correct Option: B

Question 15

Given:

import java.util.*;   
public class Looking {   
  public static void main(String[] args) {   
    String input = "1 2 a 3 45 6";   
    Scanner sc = new Scanner(input);   
    int x = 0;   
    do {  
       x = sc.nextInt();  
       System.out.print(x + " ");  
     } while (x!=0);  
   }  
 }

What is the result?

technology programming languages

1 2
1 2 3 45 6
1 2 3 4 5 6
1 2 a 3 45 6
1 2 followed by an exception

Answer

Correct Option: E

Question 16

SAS stands for

technology programming languages

Statistical Analysis System
Statistical Analysis Systems
Statistic Analysis System
Statestical Analysis System

Answer

Correct Option: A

Question 17

SAS is a

technology programming languages

Low Level Language
High Level Language
Machine Level Language
Binary Level Language

Answer

Correct Option: B

Question 18

SAS is a

technology programming languages

Sixth Generation Language
Third Generation Language
Fifth Generation Language
Fourth Generation Language

Answer

Correct Option: D

Question 19

SAS can be used to

technology programming languages

Data access
Data management
Data analysis
All the above

Answer

Correct Option: D

Question 20

SAS can't be used for "Data Presentation"

technology programming languages

True
False

Answer

Correct Option: B

Description: programming languages Online Quiz - 8
Number of Questions: 20
Created by: Aliensbrain Bot
Tags: programming languages

programming languages Online Quiz - 8

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