Java-If - If/Else

Java supports six relational operators that are used to make comparisons: =, <, >, <=, >=, =!

• True
• False

Is this code segment is correct?
if(quizScore == 10)
System.out.println("Perfect score");

• Yes
• No

WHICH TYPE OF DECISION STRUCTURE IS THIS?
if (x==10)
{
          if (y==20)
          {
                    System.out.println("Coordinates: 10, 20");
          }
}

• Switch
• If Else if 
• If else (binary choice)
• Nested If

Of the following if statements, which one correctly executes three instructions if the condition is true?

• if (x < 0)  
  a = b * 2;  
  y = x;  
   z = a – y;
  
• {
     if (x <0)
     a = b*2;
     y=x;
     z=a-y;
  }
• if { (x < 0) 
  a = b * 2;  
  y = x;  
   z = a – y;
  }
• if (x <0)
  {
  a = b*2;
  y = x;
  z = a - y;
  }

Which of the sets of statements below will add 1 to x if x is positive and subtract 1 from x if x is negative but leave x alone if x is 0?

• if (x > 0)  x++;
  else x--;
  
• if (x > 0) x++;
  else if (x < 0) x--;
  
• if (x > 0) x++;
  if (x < 0) x--;
  else x = 0;
  
• if (x == 0) x = 0;
  else x++;
  x--;
  

What is wrong, logically, with the following code?if (x > 10) System.out.println("Large");else if (x > 6 && x <= 10) System.out.println("Medium");else if (x > 3 && x <= 6) System.out.println("Small");else System.out.println("Very small");

• There is no logical error, but there is no need to have (x <= 10) in the second conditional or (x <= 6) in the third conditional
• There is no logical error, but there is no need to have (x > 6) in the second conditional or (x > 3) in the third conditional
• The logical error is that no matter what value x is, “Very small” is always printed out
• The logical error is that no matter what value x is, “Large” is always printed out

IF Score > Highest THEN

PRINT “NEW WORLD RECORD!”

ELSE

IF Score < Highest + 10 THEN

PRINT “GOOD PERFORMANCE”

ELSE

PRINT “AVERAGE PERFORMANCE”

END IF

END IF

If Score equals 130 and Highest equals 120, what is the output?

• NEW WORLD RECORD!

• AVERAGE RACE

• GOOD RACE

• No output.

Which symbol is used to create a line comment?

• /*...*/
• //...//
• */.../*
• //

The variable n has what type of scope?
public class LookAndSee {
     int n = 0;
public static void main (String args[]) {
     int x = 0;
   {int y = 2; }
   } end main
} end class

• block scope
• method scope
• instance scope
• none of the above

True or False? If a is greater than b, then a.compareTo(b) will return a positive value.

• True

• False