Chapter 3- arrays

Question 1

You can think of an array as a collection of variables contained within a single variable

Answer 1

True

Question 2

You access an arrays elements value just as you access the value of any other variable except that you include the element index in brackets

Answer 2

True

Question 3

An if statement keeps repeating until it’s conditional expression evaluated to false

Answer 3

False

Question 4

Case labels must be discrete values and cannot use operators

Answer 4

True

Question 5

A break statement restarts a loop with a new iteration.

Answer 5

False

Question 6

You use a ____ when you want to store a group or a list of related information in a single, easily managed location

Answer 6

Array

Question 7

Each piece of data contained in an array is called an __

Answer 7

Element

Question 8

The _ statement is used to execute specific programming code if the evaluation of a conditional expression returns a truthy value

Answer 8

If

Question 9

A set of statements contained within a set of braces is known as ___ block

Answer 9

Command

Question 10

If you want to execute one set of statements when a condition evaluated to a truthy value and another set of statements when the condition evaluated to a falsy value, you need the _ statement

Answer 10

If/else

Question 11

The _ statement controls program flow by executing a specific set of statements, depending on the value of an expression

Answer 11

Switch

Question 12

A _ label in a switch statement represents a specific value and is followed by one or more statements that are executed if the value of the label matches the value of the switch statements expression

Answer 12

Case

Question 13

A case label consists of the keyword case, followed by a literal value or variable name, followed by a _

Answer 13

Colon

Question 14

The _ label contains statements that execute when the value returned by the switch statement expression does not match a case label

Answer 14

Default

Question 15

A _ statement is used to end the execution of a switch statement

Answer 15

Break

Question 16

The conditional expression in the whole statement is enclosed within _ following the keyword while

Answer 16

Parentheses

Question 17

A _ statement is a control flow statement that repeatedly executed a statement or a series of statements that while the value of a specific condition is truthy or until the value of a specific condition becomes truthy

Answer 17

Loop

Question 18

One of the simplest types of loop statements is the _ statement which repeats a statement or series of statements as long as a given conditional expression evaluated to a truthy value

Answer 18

If

Question 19

Each repetition of a looping statement is called a _

Answer 19

Iteration

Question 20

Unlike the while statement the statements in a _ statement always execute once, before a conditional expression is evaluated

Answer 20

Do/while

Question 21

The _ statement is used to repeat a statement or series of statements as long as a given conditional expression evaluated to a truthy value

Answer 21

For

Question 22

A _ statement restarts a loop with a new iteration

Answer 22

Continue

Question 23

A single statement that declares a variable and specifies array values as its content is called an array _

Answer 23

Literal

Question 24

Which of the following references the second element in the newSections array?

Answer 24

newsSections[1]

Question 25

Which method returns a collection of references to all instances of a certain element in an HTML document?

Answer 25

getElementsByTagName()

Question 26

Changing the order in which a JavaScript code is executed is known as _

Answer 26

Controlling flow

Question 27

To end a switch statement once it performs its required task, include a _ statement at the end of the statements associated with each case label

Answer 27

Break

Question 28

In a _ loop, a loop statement never ends because it’s conditional expression is never falsy

Answer 28

Infinite

Question 29

Each repetition of a looping statement is called a _

Answer 29

Iteration

Question 30

Placing one decision making statement within another decision making statement creates a _ decision making structure

Answer 30

nested