JavaScript Interview Questions and Answers

JavaScript Interview Questions and Answers

JavaScript Interview Questions and answers

JavaScript Interview Questions and answers for beginners and experts. List of frequently asked JavaScript Interview Questions with answers by Besant Technologies. We hope these JavaScript Interview Questions and answers are useful and will help you to get the best job in the networking industry. This JavaScript Interview Questions and answers are prepared by JavaScript Professionals based on MNC Companies expectation. Stay tuned we will update New JavaScript Interview questions with Answers Frequently.

Best JavaScript Interview Questions and answers

Besant Technologies supports the students by providing JavaScript Interview Questions and answers for the job placements and job purposes. JavaScript is the leading important course in the present situation because more job openings and the high salary pay for this JavaScript and more related jobs. We provide the JavaScript online training also for all students around the world through the Gangboard medium. These are top JavaScript Interview Questions and answers, prepared by our institute experienced trainers.

JavaScript Interview Questions and answers for the job placements

Here is the list of most frequently asked JavaScript Interview Questions and answers in technical interviews. These questions and answers are suitable for both freshers and experienced professionals at any level. The questions are for intermediate to somewhat advanced JavaScript professionals, but even if you are just a beginner or fresher you should be able to understand the answers and explanations here we give.

Q1.) What is JavaScript?

Q2.) What are JavaScript Data Types?

Q3.) What is the differentiation between JavaScript and Java?

Q4.) What close() makes in Javascript?

Q5.) What is the definition of the prompt box?

Q6.) List some features of JavaScript

Q7.) List some of the advantages of JavaScript.

Q8.) What are the disadvantages of using inner HTML in JavaScript?

Q9.) What does a type of operator do?

Q10.) What are the different scopes of a variable? Define local variable?

Q11.) What is the means by 'call back'?

Q12.) What does unshift() function do in Javascript?

Q13.) What is Means by Currying in Javascript?

Q14.) What are Cookies in Javascript?

Q15.) What is the purpose of Object.defineProperties () method?

Q16.) Define the mechanism of the type of operator?

Q17.) What are the meanings of undefined variables and undeclared variables?

Q18.) What is try catch in JavaScript?

Q19.) What is the role of JavaScript in a web page?

Q20.) What is the 'Strict' mode in JavaScript and how can it be enabled?

Q21.) Why use JavaScript strict mode?

Q22.) How does inheritance work in JavaScript?

Q23.) What is the use of Push method in JavaScript?

Q24.) What does Pop () method of the array do?

Q25.) What is unshift method in JavaScript?

Q26.) What does .push do in JavaScript?

Q27.) What is object in Javascript?

Q28.) Is Exception handling possible in Javascript?

Q29.) How do I fix JavaScript errors?

Q30.) What is error handling in JavaScript?

Q31.) What would be the output of following code ?

Q32.) What Is The Difference Between Sessionstate And Viewstate?

Q33.) Can Javascript Code Be Broken In Different Lines?

Q34.) Is A Javascript Script Faster Than An Asp Script?

Q35.) How are object properties assigned?

Q36.) What are the different types of errors in JavaScript?

Q37.) What are non primitive data types in JavaScript?

Q38.) Which keywords are used to handle exceptions?

Q39.) What is the use of blur function?

Q40.) Can JavaScript react to events?

Q41.) What is the function of delete operator?

Q42.) Methods Get And Post In Html Forms - What's The Difference?

Q43.) What Is A Hypertext Link?

Q44.) Explain how can you submit a form using JavaScript?

Q45.) Does JavaScript support automatic type conversion?

Q46.) How does return work in JavaScript?

Q47.) how can the style/class of an element be changed?

Q48.) What is the difference between JavaScript and JScript?

Q49.) What is eval JavaScript?

Q50.) What is called Variable typing in Javascript?

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