quiz 5

TJ05_q01.  The symbol:

==

is:

• it is not an operator

• an assignment operator

• a relational operator

• none of the other choices is correct

TJ05_q02.   A relational operator:

• creates a relation

• none of the other choices is correct

• returns 0 or 1

• could be + or -

• can return either true or false

TJ05_q03. The following:

5 < "6"

is a valid application of a relational operator

• true

• false

TJ05_q04. When evaluating the expression:

5 < 6.0 

• this is not a valid expression

• Java automatically converts the 6.0 to 6

• both the 5 and the 6.0 are converted to Strings

• Java automatically converts the 5 to 5.0

• None of the other choices is correct

TJ05_q06. The following code:

String fruit1 = "Apple";

String fruit2 = "Orange";

System.out.println(fruit1.equals(fruit2));

• the other choices are incorrect

•  

  produces an error

•  

  prints true

•  

  doesn't print anything

•  

  prints false

TJ05_q07.  The following expression:

5 < 10 && 5 > 10

• the other choices are false

•  

  is true

•  

  is false

•  

  produces an error

TJ05_q08.  Consider the following fragment of code:

if (x > 0) { if (x < 10) {

System.out.println("positive single digit number."); }

}

Which of the following is equivalent?

• if (x > 0 and < 10) {

              System.out.println("positive single digit number.");

          }

• if (x > 0 || x < 10) {

              System.out.println("positive single digit number.");

•   if (x > 0 && x < 10) {

              System.out.println("positive single digit number.");

          }

• none of the other choices is correct

TJ05_q08. what does this print:

System.out.println(3 == 4);

• false

•  

  No answer text provided.

• true

•  

  nothing, this is an error

TJ05_q11. what does this print

System.out.println(30 != 40);

• false

•  

  No answer text provided.

• true

•  

  nothing this is an error

TJ05_q12. what does this print

System.out.println(3>3)

•  

  false

•  

  No answer text provided.

•  

  nothing this is an error

•  

  true