Which of the following conditions is true only when the integer variables a , b

Question

Which of the following conditions is true only when the integer variables a, b, and c contain three different values

a != b != c

Assuming that a user enters 25 as the value for x, what is the output of the following code snippet?

int x;
Scanner in = new Scanner(System.in);
System.out.print("Enter a number: ");
x = in.nextInt();

if (x < 100)
     x = x + 5;
if (x < 500)
     x = x - 2;
if (x > 10)
     x++;
else
     x--;
System.out.println(x);

(a != b) && (a != c) && (b != c)

What is the output of the code snippet given below?

for (int i = 0; i != 9; )
{
      System.out.print (" " + i);
      i = i + 2;
}

How many times does the following code snippet display "Loop Execution"?

for (int i = 0; i < 10; i++) ;
{
     System.out.println("Loop Execution") ;
}

Ten times

What does the output show when this loop executes and finally terminates?

for ( int i = 20 ; i >= 2 ; i = i - 6 )
{
      System.out.print ( i + ", " );
}

20, 14, 8, 2, –4

Which of the following for loops is not valid?

Which of the following for loops is not valid?

for (int i = 0; ; ) { . . . }

Given the following code snippet, what should we change to have all 26 alphabetic characters in the string str?

String str = "";
for ( char c = 'A' ; c < 'Z' ; c++ )
{
      str = str + c;
}

Given the following code snippet, what should we change to have all 26 alphabetic characters in the string str?

String str = "";
for ( char c = 'A' ; c < 'Z' ; c++ )
{
      str = str + c;
}

c <= 'Z'

Insert a statement that will correctly terminate this loop when the end of input is reached.

boolean done = false;
while (!done)
{
      String input = in.next();
      if (input.equalsIgnoreCase("Q"))
      {
          __________
      }
      else
      {
           double x = Double.parseDouble(input);
           data.add(x);
       }
}

done = false;

How many times will the output line be printed in the following code snippet?

for (int num2 = 1; num2 <= 3; num2++)
{
       for (int num1 = 0; num1 <= 2; num1++)
           {
                 System.out.println ( "" + num2 + " " + num1 );
           }
}

Explanation / Answer

Question 1

Answer:

(a != b) || (a != c) || (b != c)

a != b != c

Question 2

Answer:

29

Question 3

Answer:

0 2 4 6 8 10 12 14 …. (infinite loop)

Question 4

Answer:

Ten times

Question 5

Answer:

20, 14, 8, 2

Question 6

Answer:

for (int i = 0) { . . . }

Question 7

Answer:

for (int i = 0) { . . . }

Question 8

Answer:

c <= 'Z'

Question 9

Answer:

c <= 'Z'

Question 10

Answer:

done = true;

Question 11

Answer:

9 times

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