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

Accepted Answer

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

Accepted Answer

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

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

Accepted Answer

The expression Math.pow(2, 3) calculates 2 raised to the power of 3, which is 8. Then, 2 * 8 equals 16.

Question 4

Switch statements contain ________ labels.
A) select
B) if...else
C) case
D) choice

Accepted Answer

Switch statements use "case" labels to define different execution paths based on the value of a variable or expression.

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

Accepted Answer

The "switch" statement is a multiple-selection statement used in programming to handle decision making by evaluating a variable or expression and executing the corresponding case block, effectively replacing multiple if and if...else statements.

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

Accepted Answer

The answer of Consider the following code selections. Assume count...

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

Accepted Answer

The script uses a loop that increments 'count' from 1 to 10, but breaks out of the loop when 'count' equals 5. Therefore, the value of 'count' when the loop breaks is 5, which is what gets printed.

Question 8

Which of the following will not evaluate to true
A) false || false
B) true || true
C) false || true
D) true || false

Accepted Answer

The expression "false || false" evaluates to false because both operands are false, and the logical OR operator (||) requires at least one operand to be true to evaluate to true.

Question 9

Which of the following will not evaluate to false
A) false && false
B) true && true
C) false && true
D) true && false

Accepted Answer

true && true will evaluate to true, all other expressions will evaluate to 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

Accepted Answer

The answer of What would the browser display if the...

Question 11

Which of the following is not required for counter-controlled repetition
A) final value
B) initial value
C) sentinel
D) increment

Accepted Answer

Counter-controlled repetition requires an initial value, a final value, and an increment to control the loop. A sentinel is used in sentinel-controlled repetition, not counter-controlled repetition.

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

Accepted Answer

The toFixed(2) method rounds the number to two decimal places, resulting in 2.46.

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

Accepted Answer

An integer is typically used as a counter in counter-controlled repetition because it provides precise and predictable increments or decrements.

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

Accepted Answer

The loop condition `i > 5` is false from the start, so the loop runs once, printing "O" before checking the condition.

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

Accepted Answer

The answer of What would the browser display if the...

Quiz 8: Javascript: Control Statements II

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 >

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

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

Switch statements contain ________ labels.

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

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

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 >

Which of the following will not evaluate to true

Which of the following will not evaluate to false

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 >

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

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

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

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 >

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 >