Javacript_Quiz 3

Which of the following function of Array object returns the first (least) index of an element within the array equal to the specified value, or -1 if none is found?

indexOf()
join()
lastIndexOf()
map()

Which of the following function of String object returns a string representing the specified object?

toLocaleUpperCase()
toUpperCase()
toString()
substring()

Which of the following function of String object causes a string to be displayed as a subscript, as if it were in a <sub> tag?

sup()
small()
strike()
sub()

Which of the following function of Array object applies a function simultaneously against two values of the array (from left-to-right) as to reduce it to a single value?

pop()
push()
reduce()
reduceRight()

Can you pass a anonymous function as an argument to another function?

true
false

Which of the following function of Array object returns a new array comprised of this array joined with other array(s) and/or value(s)?

concat()
pop()
push()
some()

Which built-in method returns the length of the string?

length()
size()
index()
None of the above

Which of the following function of Array object calls a function for each element in the array?

concat()
every()
filter()
forEach()

Which of the following is an advantage of using JavaScript?

Less server interaction
Immediate feedback to the visitors
Increased interactivity
All of the above

Which of the following function of Array object returns a string representing the array and its elements?

toSource()
sort()
splice()
toString()

Which of the following function of Array object adds one or more elements to the end of an array and returns the new length of the array?

pop()
push()
join()
map()

Which of the following function of Array object extracts a section of an array and returns a new array?

reverse()
shift()
slice()
some()

Which of the following function of Number object formats a number with a specific number of digits to the right of the decimal?

toExponential()
toFixed()
toPrecision()
toLocaleString()

Which of the following function of String object causes a string to be displayed in the specified color as if it were in a <font color=’color’> tag?

fixed()
fontcolor()
blink()
bold()

Which built-in method returns the string representation of the number’s value?

toValue()
toNumber()
toString()
None of the above

Which of the following is the correct syntax to create a cookie using JavaScript?

document.cookie = 'key1 = value1; key2 = value2; expires = date'
browser.cookie = 'key1 = value1; key2 = value2; expires = date'
window.cookie = 'key1 = value1; key2 = value2; expires = date'
navigator.cookie = 'key1 = value1; key2 = value2; expires = date'

Which of the following is true about variable naming conventions in JavaScript?

JavaScript variable names must begin with a letter or the underscore character
JavaScript variable names are case sensitive
Both of the above
None of the above

Which of the following function of String object returns a number indicating whether a reference string comes before or after or is the same as the given string in sort order?

localeCompare()
search()
substr()
concat()

Which of the following function of Number object returns a string value version of the current number in a format that may vary according to a browser’s locale settings.?

toExponential()
toFixed()
toLocaleString()
toString()

Which of the following function of String object returns the character at the specified index?

charAt()
charCodeAt()
concat()
indexOf()

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