Eksekutif.Java 2

1.      What is the answer for Math.sqrt(-9)?
a.   -3       b.   3         c.   81        d.   NaN

2.      What is the output of the following statement?
int iNum = 12;
double dNum = iNum/10;
System.out.println(iNum + " " + dNum);
a.   12 1.2  b.   12.0 1.0   c.   12 1.0    d.   12.0 1.2

3.      What is the output of the following statement?
int iNum = 12;
double dNum = (double) iNum/10;
System.out.println(iNum + " " + dNum);
a.   12 1.2   b.   12.0 1.0   c.   12 1.0   d.   12.0 1.2

4.      Which of the following is NOT a relational (comparison) operator in Java?
a.   =        b.   !=         c.   >=       d.   <=

5.      The result of the boolean expression 3 + 5 <= 8 is
a.   true     b.   false      c.   0        d.   The expression will generate a compile error

6.      The result of the boolean expression 'B' < 'a' is
a.   true     b.   false      c.   0        d.   The expression will generate a compile error

7.      The result of the boolean expression '3' < 'C' is
a.   true     b.   false      c.   0        d.   The expression will generate a compile error

8.      The result of the boolean expression 3 < '3' is
a.   true     b.   false      c.   0        d.   The expression will generate a compile error

9.      Which of the following contains only relational operators?
a.   =      <      >          b.   <=     >=     ==
c.   =<     >=     ==         d.   <      <>     >

10.  Consider the following code fragment:
sc refers to an instance of Scanner class, which is created as:
Scanner sc = new Scanner (System.in);

         int x = sc.nextInt();
         if (x >= 0)
           System.out.println("The input is ") ;
         System.out.println(x);

Which of the following statements is true?
The value of x always gets printed out.
The value of x gets printed out only when the input is positive or zero.
The value of x gets printed out only when the input is negative.
The value of x never gets printed out.

11.  What will be the value of num after the following section of code executes:
int num = 15;
if (num > 10)
   num = num * 2;
else
   num = num - 2;

a.   8         b.   13       c.   20       d.   30

12.  The output for the following fragment code is
int num = 11;
if (num >= 10)
   num = num / 2;
   System.out.println(num);
System.out.println("Done");

a.   Done      b.   5        c.   5.5      d.   11
                    Done          Done          Done

13.  What will the following code print?
int code = 321 % 4;
if (code == 0)
System.out.println("KL");
else if (code == 1)
System.out.println("PJ");
else if (code == 2)
System.out.println("SA");
else
System.out.println("Klang");
}

a.   KL         b.   PJ      c.   SA       d.   Klang KL

14.  Consider the following code fragment:
sc refers to an instance of Scanner class, which is created as:
Scanner sc = new Scanner (System.in);

        int x;
        x = sc.nextInt() ;
        if (x >= 0)
            System.out.println("positive input:");
            System.out.println(x);
        else
            System.out.println("negative input:");
            System.out.println(x);


Which of the following statements is true?
The code fragment will not compile.
If the value entered for x is zero no output occurs.
If the value entered for x is positive, "positive input:" is displayed, followed by the value of x, displayed once.
If the value entered for x is positive, "positive input:" is displayed, followed by the value of x, displayed twice.