Javascript Online Quiz

Q 1 - Which of the following is true about variable naming conventions in JavaScript?

A - You should not use any of the JavaScript reserved keyword as variable name.

B - JavaScript variable names should not start with a numeral (0-9).

C - Both of the above.

D - None of the above.

Q 2 - Can you assign a anonymous function to a variable?

A - true

B - false

Q 3 - Which built-in method returns the character at the specified index?

A - characterAt()

B - getCharAt()

C - charAt()

D - None of the above.

Q 4 - Which of the following function of Number object formats a number with a specific number of digits to the right of the decimal?

A - toExponential()

B - toFixed()

C - toPrecision()

D - toLocaleString()

Q 5 - Which of the following function of Boolean object returns a string of either 'true' or 'false' depending upon the value of the object?

A - toSource()

B - valueOf()

C - toString()

D - None of the above.

Q 6 - Which of the following function of String object splits a String object into an array of strings by separating the string into substrings?

A - slice()

B - split()

C - replace()

D - search()

Q 7 - Which of the following function of String object returns the calling string value converted to lower case while respecting the current locale?

A - toLocaleLowerCase()

B - toLowerCase()

C - toString()

D - substring()

Q 8 - Which of the following function of String object creates an HTML hypertext link that requests another URL?

A - link()

B - sub()

C - sup()

D - small()

Q 9 - Which of the following function of Array object calls a function for each element in the array?

A - concat()

B - every()

C - filter()

D - forEach()

Q 10 - Which of the following function of Array object adds and/or removes elements from an array?

A - toSource()

B - sort()

C - splice()

D - unshift()