Javascript Online Quiz
Following quiz provides Multiple Choice Questions (MCQs) related to Javascript Framework. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.
Q 1 - Which of the following is true about variable naming conventions in JavaScript?
A - JavaScript variable names must begin with a letter or the underscore character.
Answer : C
Explanation
Both of the above options are correct.
Q 2 - Which of the following type of variable is visible everywhere in your JavaScript code?
Answer : A
Explanation
Global Variables: A global variable has global scope which means it is visible everywhere in your JavaScript code.
Q 3 - Which built-in method calls a function for each element in the array?
Answer : C
Explanation
forEach() method calls a function for each element in the array.
Q 4 - Which built-in method returns the characters in a string beginning at the specified location?
Answer : A
Explanation
substr() method returns the characters in a string beginning at the specified location through the specified number of characters.
Q 5 - Which of the following function of String object returns a number indicating the Unicode value of the character at the given index?
Answer : B
Explanation
charCodeAt() − Returns a number indicating the Unicode value of the character at the given index.
Q 6 - 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?
Answer : A
Explanation
localeCompare() − Returns a number indicating whether a reference string comes before or after or is the same as the given string in sort order.
Q 7 - Which of the following function of String object creates a string to be displayed as bold as if it were in a <b> tag?
Answer : D
Explanation
bold() − Creates a string to be displayed as bold as if it were in a <b> tag.
Q 8 - Which of the following function of String object causes a string to be displayed in fixed-pitch font as if it were in a <tt> tag?
Answer : A
Explanation
fixed() − Causes a string to be displayed in fixed-pitch font as if it were in a <tt> tag.
Q 9 - Which of the following function of Array object creates a new array with all of the elements of this array for which the provided filtering function returns true?
Answer : C
Explanation
filter() − Creates a new array with all of the elements of this array for which the provided filtering function returns true.
Q 10 - Which of the following function of Array object returns a string representing the array and its elements?
Answer : D
Explanation
toString() − Returns a string representing the array and its elements.
