{"id":115,"date":"2021-08-02T05:07:54","date_gmt":"2021-08-02T05:07:54","guid":{"rendered":"https:\/\/codecasm.com\/blogs\/?p=115"},"modified":"2021-08-02T05:10:12","modified_gmt":"2021-08-02T05:10:12","slug":"javascript-interview-questions","status":"publish","type":"post","link":"https:\/\/codecasm.com\/blogs\/javascript-interview-questions\/","title":{"rendered":"JavaScript interview questions"},"content":{"rendered":"\n<p><br>1. What is ES6?<br>2. Features of ES6?<br>3. Difference between var, let &amp; const<br>4. What is object in JavaScript?<br>5. What is literals in JavaScript?<br>6. Difference ways to create object in JavaScript?<br>7. What is &#8216;this&#8217; object in JavaScript?<br>8. What is prototype?<br>9. Do you know inheritance? Do we have inheritance in JavaScript? How to use it?<br>10. What is closure? Give an example?<br>11. What is callback? Give an example?<br>12. Do you know callback hell? Please explain?<br>13. What is apply, bind &amp; call?<br>14. What is filter &amp; map?<br>15. What is map &amp; set?<br>16. List the array functions(methods)<br>17. What is deep &amp; shallow copy? Difference between both?<br>18. What is RxJS?<br>19. How many operators are there in RxJS?<br>20. What is forkjoin?<br>21. What is an observable?<br>22. What is subject behaviour?<br>23. What is promise?<br>24. What is async &amp; wait? Explain with example?<br>25. Difference between promise &amp; async-await?<br>26. How do you handle nested promise call?<br>27. What is difference between setTimeout &amp; setInterval?<br>28. What is constructor?<br>29. Explain me types of access modifier?<br>30. What is singleton class?<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1. What is ES6?2. Features of ES6?3. Difference between var, let &amp; const4. What is object in JavaScript?5. What is literals in JavaScript?6. Difference ways to create object in JavaScript?7. What is &#8216;this&#8217; object in JavaScript?8. What is prototype?9. Do you know inheritance? Do we have inheritance in JavaScript? How to use it?10. What is [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[37,9,25],"class_list":["post-115","post","type-post","status-publish","format-standard","hentry","category-javascript","tag-interview","tag-javascript","tag-learning"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/codecasm.com\/blogs\/wp-json\/wp\/v2\/posts\/115","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/codecasm.com\/blogs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/codecasm.com\/blogs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/codecasm.com\/blogs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/codecasm.com\/blogs\/wp-json\/wp\/v2\/comments?post=115"}],"version-history":[{"count":1,"href":"https:\/\/codecasm.com\/blogs\/wp-json\/wp\/v2\/posts\/115\/revisions"}],"predecessor-version":[{"id":116,"href":"https:\/\/codecasm.com\/blogs\/wp-json\/wp\/v2\/posts\/115\/revisions\/116"}],"wp:attachment":[{"href":"https:\/\/codecasm.com\/blogs\/wp-json\/wp\/v2\/media?parent=115"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/codecasm.com\/blogs\/wp-json\/wp\/v2\/categories?post=115"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/codecasm.com\/blogs\/wp-json\/wp\/v2\/tags?post=115"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}