Deck 8: Javascript: Control Statements II

Question 1

What would the browser display if it executed the following script
< script type = "text/javascript" >
< !--
For ( var count = 0; count < 10; ++count )
{
If ( count == 5 )
Continue;
}
Document.writeln( count );
//-- >
< /script >

A) Nothing; the script would generate an error.
B) 5
C) 9
D) 10

Answer 1

D

Question 2

In a switch statement, the ________ case clause is used to process exceptional conditions and is usually listed last.

A) break
B) default
C) else
D) then

Answer 2

B

Question 3

What is the value of num after the following statement is performed
Num = 2 * Math.pow( 2, 3 );

A) 16
B) 18
C) 64
D) 8

Answer 3

A

Question 4

Switch statements contain ________ labels.

A) select
B) if...else
C) case
D) choice

Question 5

The ________ multiple-selection statement is used to handle decision making and can be used to replace multiple if and if...else statements.

A) do...while
B) case
C) break
D) switch

Question 6

Consider the following code selections. Assume count is initialized to 7 and num is initialized to 0.
I) ii)
Do
{ while ( count < 6 )
Num = count; num = count;
} while ( count < 6 )
What will the value of num be for i) and ii) respectively after the loops have been executed

A) 0, 0
B) 0, 7
C) 7, 0
D) 7, 7

Question 7

What would the browser display if it executed the following script
< script type = "text/javascript" >
< !--
For ( var count = 1; count < = 10; ++count )
{
If ( count == 5 )
Break;
}
Document.writeln( count );
//-- >
< /script >

A) Nothing; the script would generate an error.
B) 1
C) 5
D) 10

Question 8

Which of the following will not evaluate to true

A) false || false
B) true || true
C) false || true
D) true || false

Question 9

Which of the following will not evaluate to false

A) false && false
B) true && true
C) false && true
D) true && false

Question 10

What would the browser display if the following script were executed
< script type = "text/javascript" >
< !--
For ( var i = 0; i < 5; i++ )
Document.write( "O" );
//-- >
< /script >

A) Nothing; the script would generate an error
B) OOOO
C) OOOOO
D) OOOOOO

Question 11

Which of the following is not required for counter-controlled repetition

A) final value
B) initial value
C) sentinel
D) increment

Question 12

What is the value of num after the following statements are performed
Num = 2.4589;
Num = num.toFixed( 2 );

A) 2
B) 2.46
C) 2.5
D) 2.45

Question 13

What should you use as a counter in counter-controlled repetition

A) a floating-point number
B) a sentinel
C) an integer
D) a num object

Question 14

What would the browser display if it executed the following script
< script type = "text/javascript" >
< !--
Var i = 0;
Do
{
Document.write( "O" );
I++;
} while ( i > 5 );
//-- >
< /script >

A) Nothing; the script would generate an error
B) O
C) OOOOO
D) OOOOOO

Question 15

What would the browser display if the following script were executed
< script type = "text/javascript" >
< !--
For ( var i = 0; var i < 5; var i++ )
Document.write( "X" );
//-- >
< /script >

A) Nothing; the script would generate an error
B) XXXX
C) XXXXX
D) XXXXXX