Deck 7: Javascript: Control Statements I

Question 1

Which of the following statements is correct

A) If ( studentGrade >= 60 ) document.writeln( "Passed" );
B) if ( studentGrade >= 60 ); document.writeln( "Passed" );
C) if ( studentGrade >= 60 ) document.write( "Passed" );
D) If ( studentGrade >= 60 ); document.write( "Passed" );

Answer 1

C

Question 2

What would the browser display if the following code were executed in a script
Var x = 11;
Var y = 14;
If ( x > 13 )
If ( y > 13 )
Document.writeln( "x and y are > 13" );
Else
Document.writeln( "x is < = 13" );

A) nothing
B) 11
C) x and y are > 13
D) x is < = 13

Answer 2

A

Question 3

Which of the following flowchart symbols can represent an if statement

A) diamond
B) oval/circle
C) rectangle
D) flowline

Answer 3

A

Question 4

What would the browser display if the following code were executed in a script
Var product = 0;
While (product >= 25)
Product = 2 + product;
Document.writeln( product );

A) nothing, the script would result in an error
B) 0
C) 24
D) 26

Question 5

If the string passed to parseInt contains a floating-point numeric value, parseInt will ________.

A) return NaN
B) return 0
C) round the value to the nearest tenth
D) truncate the floating-point part to be left with an integer value

Question 6

If the string passed to parseInt contains text characters, parseInt will ________.

A) return NaN
B) return 0
C) return the sum of the characters' ASCII values
D) truncate the text entries

Question 7

Which of the following flowchart symbols indicates that a decision is to be made

A) diamond
B) oval/circle
C) rectangle
D) flowline

Question 8

What would the browser display if the following script were executed
< script type = "text/javascript" >
Var count = 0;
Var total = 0;
While ( count < = 5 )
{
Total = total + 10;
Count = count + 1;
}
Document.write( total );
< /script >

A) Nothing; the browser would generate an error.
B) 0
C) 50
D) 60

Question 9

What would the browser display if the following code were executed in a script
Var product = 0;
While ( product < = 25 );
Product = 2 + product;

A) nothing, the script would result in an inifite-loop error
B) 0
C) 25
D) 26

Question 10

________ is an informal language that helps programmers develop algorithms.

A) JavaScript
B) ECMAScript
C) Pseudocode
D) AlgorithmCode

Question 11

The word sequence in the term sequence structure refers to the sequence of ________.

A) bits in a JavaScript instruction
B) JavaScript instructions in a script
C) scripts in an HTML file
D) HTML files in a Web site

Question 12

Research determined that all programs could be written in terms of only three control structures. Which of the following is not one of the three control structures

A) goto-less structure
B) sequence structure
C) selection structure
D) repetition structure

Question 13

Which of the following is a JavaScript repetition statement

A) while...repeat
B) do...while
C) do...repeat
D) for...do

Question 14

Which of the following is not a JavaScript selection statement

A) if...else
B) for...in
C) switch
D) if

Question 15

Specifying the order in which programming statements are to be executed is called ________.

A) program control
B) a program structure
C) a control structure
D) an algorithm

Question 16

What would the browser display if the following code were executed in a script
Var grade = 59;
If ( grade >= 60 )
Document.writeln( "Passed." );
Else
Document.write( "Failed. " );
Document.writeln( "You must take this course again." );

A) Passed.
B) Failed.
C) You must take this course again.
D) Failed. You must take this course again.

Question 17

A program in which all statements are executed one after the other in the order in which they are written exhibits ________.

A) transfer of control
B) algorithms
C) sequential execution
D) direct execution

Question 18

A procedure for solving a problem in terms of the actions to be executed and the order in which these actions are to be executed is called ________.

A) program control
B) a program structure
C) a control structure
D) an algorithm

Question 19

What would the browser display if the following script were executed
< script type = "text/javascript" >
Var count = 5;
Var total = 0;
While ( count > -1 )
{
Total = total - 10;
Count = count - 1;
}
Document.write( total );
< /script >

A) Nothing; the browser would generate an error.
B) 0
C) -50
D) -60

Question 20

Which of the following is not a JavaScript keyword

A) break
B) delete
C) sub
D) for

Question 21

The word top in the term top-down stepwise refinement refers to which of the following

A) the first statement that appears in the script
B) the first statement that appears in the algorithm
C) the single statement that completely represents the script
D) the entire algorithm

Question 22

What output will the following script produce
Var i = 0;
Var j = 3;
Var counter = 0;
While ( i < 5 )
{
If (i != j)
Counter = counter + i;
I = i + 1
}
Document.write( counter );

A) 9
B) 14
C) 3
D) 7

Question 23

What type of loop should be used in a script that processes test results for 150 students

A) counter controlled
B) sentinel controlled
C) algorithm controlled
D) stepwise controlled

Question 24

Which of the following is the correct abbreviation for the statement a = a * 7;

A) a =* 7;
B) a *= 7;
C) 7 =* a;
D) 7 *= a;

Question 25

What type of loop is shown in the script below
< script type = "text/javascript" >
Var gradeValue = 0,
Total = 0,
Grade = 0;
While ( gradeValue != - 1 )
{
Total = total + gradeValue;
Grade = window.prompt( "Enter Integer Grade, -1 to Quit:" , "0" );
GradeValue = parseInt( grade );
}
< /script >

A) counter controlled
B) sentinel controlled
C) algorithm controlled
D) stepwise controlled

Question 26

What is the value of i after the following statements
I = 2;
I--;
I--;

A) 0
B) 1
C) -2
D) -4

Question 27

What is the value of i after the following statements
I = 2;
I++;

A) 0
B) 2
C) 3
D) 4

Question 28

What is the output of the following script
I = 16;
Document.write( ++i );

A) 16
B) 17
C) 15
D) Nothing; the browser would generate an error.

Question 29

If the initial value of a is 15, what new value is assigned to a in the expression a %= 4

A) 2
B) 3
C) 4
D) 5