{"id":19127,"date":"2018-06-18T06:18:42","date_gmt":"2018-06-18T06:18:42","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=19127"},"modified":"2020-01-23T14:11:33","modified_gmt":"2020-01-23T08:41:33","slug":"blockchain-interview-questions","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/blockchain-interview-questions\/","title":{"rendered":"Top 30 Blockchain Interview Questions &#8211; For Freshers to Experienced"},"content":{"rendered":"<div class='__iawmlf-post-loop-links' style='display:none;' data-iawmlf-post-links='[{&quot;id&quot;:1919,&quot;href&quot;:&quot;https:\\\/\\\/www.blockchain.com&quot;,&quot;archived_href&quot;:&quot;http:\\\/\\\/web-wp.archive.org\\\/web\\\/20251003153145\\\/https:\\\/\\\/www.blockchain.com\\\/&quot;,&quot;redirect_href&quot;:&quot;&quot;,&quot;checks&quot;:[{&quot;date&quot;:&quot;2025-12-10 08:56:53&quot;,&quot;http_code&quot;:403},{&quot;date&quot;:&quot;2025-12-13 18:19:32&quot;,&quot;http_code&quot;:403},{&quot;date&quot;:&quot;2025-12-20 02:48:08&quot;,&quot;http_code&quot;:403},{&quot;date&quot;:&quot;2025-12-26 07:19:55&quot;,&quot;http_code&quot;:403},{&quot;date&quot;:&quot;2025-12-30 10:04:22&quot;,&quot;http_code&quot;:403},{&quot;date&quot;:&quot;2026-01-05 00:49:42&quot;,&quot;http_code&quot;:403},{&quot;date&quot;:&quot;2026-01-12 14:45:27&quot;,&quot;http_code&quot;:403},{&quot;date&quot;:&quot;2026-01-19 09:21:31&quot;,&quot;http_code&quot;:403},{&quot;date&quot;:&quot;2026-01-23 17:20:35&quot;,&quot;http_code&quot;:403},{&quot;date&quot;:&quot;2026-02-03 18:19:59&quot;,&quot;http_code&quot;:403},{&quot;date&quot;:&quot;2026-02-08 18:01:02&quot;,&quot;http_code&quot;:403},{&quot;date&quot;:&quot;2026-03-02 06:29:30&quot;,&quot;http_code&quot;:403},{&quot;date&quot;:&quot;2026-03-25 10:52:12&quot;,&quot;http_code&quot;:403},{&quot;date&quot;:&quot;2026-03-30 09:10:54&quot;,&quot;http_code&quot;:403},{&quot;date&quot;:&quot;2026-04-19 05:59:19&quot;,&quot;http_code&quot;:403},{&quot;date&quot;:&quot;2026-05-16 22:49:20&quot;,&quot;http_code&quot;:403},{&quot;date&quot;:&quot;2026-05-25 14:55:21&quot;,&quot;http_code&quot;:403},{&quot;date&quot;:&quot;2026-06-01 14:26:08&quot;,&quot;http_code&quot;:403}],&quot;broken&quot;:true,&quot;last_checked&quot;:{&quot;date&quot;:&quot;2026-06-01 14:26:08&quot;,&quot;http_code&quot;:403},&quot;process&quot;:&quot;done&quot;}]'><\/div>\n<h2>1. Objective &#8211; Blockchain Interview Questions<\/h2>\n<p>So, we completed our journey of <a href=\"https:\/\/data-flair.training\/blogs\/blockchain-tutorial\/\"><strong>Blockchain Technology<\/strong><\/a>. Today, we will discuss the best 30 Blockchain interview questions with their answers. These Mostly asked Interview questions for Blockchain will surely help you to crack your Blockchain interview. Moreover, we are providing the essential Blockchain interview questions and answers for both freshers and experienced. Follow this complete article, to get technical Blockchain interview questions.<\/p>\n<p>So, let&#8217;s start frequently asked Blockchain Interview Questions &amp; Answers.<\/p>\n<div id=\"attachment_19150\" style=\"width: 1210px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/06\/Blockchain-interview-Questions-3-1.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-19150\" class=\"wp-image-19150 size-full\" src=\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/06\/Blockchain-interview-Questions-3-1.jpg\" alt=\"Blockchain Interview Questions\" width=\"1200\" height=\"628\" srcset=\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/06\/Blockchain-interview-Questions-3-1.jpg 1200w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/06\/Blockchain-interview-Questions-3-1-150x79.jpg 150w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/06\/Blockchain-interview-Questions-3-1-300x157.jpg 300w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/06\/Blockchain-interview-Questions-3-1-768x402.jpg 768w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/06\/Blockchain-interview-Questions-3-1-1024x536.jpg 1024w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/a><p id=\"caption-attachment-19150\" class=\"wp-caption-text\">Top 30 Blockchain Interview Questions<\/p><\/div>\n<h2>2. Best 30 Blockchain Interview Questions<\/h2>\n<p>So, here are the 30 tricky Blockchain Interview Question with Answers:<\/p>\n<p><strong>Q 1. What do you understand by Blockchain?<\/strong><\/p>\n<p><span style=\"font-weight: 400\">The blockchain is a redistributed distributed database of immutable records. The technology was discovered with the invention of <strong><a href=\"https:\/\/data-flair.training\/blogs\/decentralized-vs-centralized-exchange\/\">Bitcoins<\/a><\/strong> (the 1st cryptocurrency). It\u2019s a trusty approach and there are heaps of firms within the present situation that are using it. As everything is secure, and since it\u2019s Associate in nursing open supply approach, it will simply be sure in the long run.<\/span><\/p>\n<p><strong>Q 2. What is the principle of Blockchain Technology?<\/strong><\/p>\n<p><span style=\"font-weight: 400\">It allows the information to be distributed among the users while not being traced.<\/span><\/p>\n<p><strong>Q 3. What are the various types of Blockchains?<\/strong><\/p>\n<p><span style=\"font-weight: 400\">Blockchains are of 3 types: <\/span><\/p>\n<ol>\n<li><span style=\"font-weight: 400\"> Public <\/span><\/li>\n<li><span style=\"font-weight: 400\"> Private<\/span><\/li>\n<li><span style=\"font-weight: 400\"> Consortium<\/span><\/li>\n<\/ol>\n<p><strong><a href=\"https:\/\/data-flair.training\/blogs\/types-of-blockchain\/\">Follow the link to know more about Blockchain Types<\/a><\/strong><\/p>\n<p><strong>Q 4. Why is Blockchain a trustworthy approach?<\/strong><\/p>\n<p><span style=\"font-weight: 400\">Blockchain can be trustworthy thanks to such a large amount of reasons.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Its compatibility with different business applications thanks to its open-source nature.<\/span><\/p>\n<p><span style=\"font-weight: 400\"><strong><a href=\"https:\/\/data-flair.training\/blogs\/blockchain-security\/\">Blockchain security<\/a><\/strong>. Because it was meant for online transactions, the developers have paid special attention to maintaining the pace once it involves its security. It extremely doesn\u2019t matter what style of business one owns, Blockchain will simply be thought of.<\/span><\/p>\n<p><strong>Q 5. Name the 2 kinds of records that are present within the Blockchain Database?<\/strong><\/p>\n<p><span style=\"font-weight: 400\"> These records are block records and transactional records. Each these records will simply be accessed, and also the neatest thing is, it&#8217;s doable to integrate them with one another while not following the complicated algorithms.<\/span><\/p>\n<p><strong>Q 6. What do you mean by blocks within the Blockchain Technology?<\/strong><\/p>\n<p><span style=\"font-weight: 400\"> Blockchain consists of a list of records. Such records are kept in blocks. These blocks are successively linked with different blocks and therefore represent a sequence known as Blockchain.<\/span><\/p>\n<p><strong>Q 7. How is a block recognized within the Blockchain approach?<\/strong><\/p>\n<p><span style=\"font-weight: 400\"> Every block during this online ledger essentially consists of a hash pointer that acts as a link to the block that is before it, transaction knowledge and in fact a stamp of time.<\/span><\/p>\n<p><strong>Q 8. Is it possible to switch the data once it&#8217;s written in an exceeding block?<\/strong><\/p>\n<p><span style=\"font-weight: 400\">No, it\u2019s impossible to do so. Just in case any modification is needed, the organization merely has to erase the knowledge from all different blocks too. Because of as a result of no different reason than this, knowledge must be given the acute care of while mistreatment this approach.<\/span><\/p>\n<p><strong>Q 9. What exactly does one comprehend the security of a block?<\/strong><\/p>\n<p><span style=\"font-weight: 400\">Well, a block or the complete blockchain is protected by a powerful cryptographic hash algorithm. Every block includes a distinctive hash pointer. Any modification within the block constituents will lead to the modification within the hash identifier of the block. Therefore, it offers a wonderful level of security. Thus, one needs to not worry regarding the protection additionally because of the security of knowing that&#8217;s gift in an exceedingly block.<\/span><\/p>\n<p><strong>Q 10. What are Merkle trees? How vital are Merkle trees in Blockchains?<\/strong><\/p>\n<p><span style=\"font-weight: 400\">Merkle Tree additionally called \u2018hash tree\u2019 is a data structure in <strong><a href=\"https:\/\/data-flair.training\/blogs\/blockchain-cryptography\/\">cryptography<\/a><\/strong> during which every leaf node could be a hash of a block of knowledge, and every non-leaf node could be a hash of its kid nodes.<\/span><\/p>\n<p><span style=\"font-weight: 400\">If somebody has to verify the existence of selected dealing in an exceedingly block, then he doesn\u2019t need to transfer the complete block. Downloading a collection of a branch of this tree that contains these dealings is enough. We have a tendency to check the hashes we are simply rising the branch (relevant to my transaction). If these hashes consider sensible, then we all know that these specific dealings exist during this block.<\/span><\/p>\n<p><strong>Blockchain Interview Questions for Freshers &#8211; Q. 1,2,3,4,5,6,9<\/strong><\/p>\n<p><strong>Blockchain Interview Questions for\u00a0Experienced &#8211; Q. 7,8,10<\/strong><\/p>\n<p><strong>Q 11. Name the common sort of ledgers which will be thought of by users in Blockchain?<\/strong><\/p>\n<p><span style=\"font-weight: 400\">These are:<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400\">Centralized Distribution<\/span><\/li>\n<li><span style=\"font-weight: 400\">Decentralized distribution<\/span><\/li>\n<li><span style=\"font-weight: 400\">Distributed network<\/span><\/li>\n<\/ul>\n<p><strong><a href=\"https:\/\/data-flair.training\/blogs\/distributed-ledger-technology\/\">Follow the link to know more about Ledger<\/a><\/strong><\/p>\n<p><strong>Q12. How is a blockchain ledger different from a standard one?<\/strong><\/p>\n<p>The first and of course the prime distinction is Blockchain is a digital ledger which will be decentralized terribly simply. The probabilities of error during this approach are way under that in a standard ledger. An ordinary ledger is what that&#8217;s ready by hands or by human efforts whereas the Blockchain performs all its tasks mechanically. You simply have to be compelled to assemble it in an exceedingly correct manner and by following all the rules.<\/p>\n<p><strong>Q 13. What type of records is kept in a Blockchain? Is there any restriction on same?<\/strong><\/p>\n<p><span style=\"font-weight: 400\">There is no restriction on keeping records of any sort within the Blockchain approach. Industries are using Blockchain for securing all kinds of records.<\/span><\/p>\n<p><span style=\"font-weight: 400\">The common kinds of records (to name a few) which will be unbroken on the Blockchains are:<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400\">Records of medical transactions<\/span><\/li>\n<li><span style=\"font-weight: 400\">Identity management<\/span><\/li>\n<li><span style=\"font-weight: 400\">Transaction process<\/span><\/li>\n<li><span style=\"font-weight: 400\">Business transactions,<\/span><\/li>\n<li><span style=\"font-weight: 400\">Management activities<\/span><\/li>\n<li><span style=\"font-weight: 400\">Documentation<\/span><\/li>\n<\/ul>\n<p><strong>Q 14. Can you explain the elements of Blockchain Ecosystem?<\/strong><\/p>\n<p><span style=\"font-weight: 400\">There square measure four completely different part of Blockchain system<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400\">Shared Ledger<\/span><\/li>\n<li><span style=\"font-weight: 400\">Virtual Machine <\/span><\/li>\n<li><span style=\"font-weight: 400\">Node application<\/span><\/li>\n<li><span style=\"font-weight: 400\">Consensus Algorithm<\/span><\/li>\n<\/ul>\n<p><strong>Q 15. State difference between proof of stake and proof of work.<\/strong><br \/>\n<span style=\"font-weight: 400\">Proof of Work<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">The possibility of Mining a Block depends upon the amount of work a miner does<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Takes more energy than \u00a0proof of stake<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400\"> Proof of Stake<\/span><\/p>\n<p><span style=\"font-weight: 400\">Stakeholder Validate new block by but utilizing their share of coin on the network<\/span><\/p>\n<p><span style=\"font-weight: 400\">The first example of proof of stake is Peercoin <\/span><\/p>\n<p><strong>Q 16. Name some widespread platforms for developing blockchain applications.<\/strong><\/p>\n<p><span style=\"font-weight: 400\">After the event of bitcoin, numerous blockchain platforms started arising. <strong><a href=\"https:\/\/data-flair.training\/blogs\/ethereum-blockchain\/\">Ethereum<\/a><\/strong> came right once the evolution of Bitcoins, and is one in all the favored public platforms for building.\u00a0<\/span><span style=\"font-weight: 400\">Blockchain primarily based applications.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Then there&#8217;s a <a href=\"https:\/\/data-flair.training\/blogs\/hyperledger-in-bitcoin\/\"><strong>Hyperledger<\/strong><\/a> community for building enterprise-based solutions. Also, Qtum, IOTA, <strong><a href=\"https:\/\/data-flair.training\/blogs\/eos-blockchain\/\">EOS<\/a><\/strong> are a number of the widely used platforms for building Blockchain.<\/span><br \/>\n<strong><a href=\"https:\/\/data-flair.training\/blogs\/decentralized-applications-blockchain\/\">Blockchain Decentralized Applications (DAPPS): Ethereum<\/a><\/strong><\/p>\n<p><strong>Q 17. What are the advantages of Blockchain that you simply know?<\/strong><\/p>\n<p><span style=\"font-weight: 400\">There are plenty of <strong><a href=\"https:\/\/data-flair.training\/blogs\/advantages-and-disadvantages-of-blockchain\/\">benefits for Blockchain<\/a>:<\/strong><\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400\">Settlement in real time<\/span><\/li>\n<li><span style=\"font-weight: 400\">Cost saving<\/span><\/li>\n<li><span style=\"font-weight: 400\">Immutability<\/span><\/li>\n<li><span style=\"font-weight: 400\">Security<\/span><\/li>\n<li><span style=\"font-weight: 400\">User Pseudonymity<\/span><\/li>\n<\/ul>\n<p><strong>Q 18. Each and every block of Blockchain consist of what elements?<\/strong><br \/>\n<span style=\"font-weight: 400\">Each and every block include three major parts<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">A hash pointer to the previous block<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Timestamp<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">List of transactions <\/span><\/li>\n<\/ul>\n<p><strong>Q 19. Which one Bitcoin or Ethereum was the first distributed blockchain implementation?<\/strong><\/p>\n<p><span style=\"font-weight: 400\">The answer is <strong><a href=\"https:\/\/data-flair.training\/blogs\/bitcoin-and-cryptocurrency-technologies\/\">Bitcoin<\/a><\/strong> as it was found on 8th August 2008<\/span><\/p>\n<p><strong><a href=\"https:\/\/data-flair.training\/blogs\/bitcoin-vs-cryptocurrency\/\">Let&#8217;s revise Bitcoin vs Cryptocurrency<\/a><\/strong><\/p>\n<p><strong>Q 20. What are the forms in which Blockchain can be stored?<\/strong><\/p>\n<p><span style=\"font-weight: 400\">The <a href=\"https:\/\/www.blockchain.com\/\">blockchain<\/a> is a distributed ledger which can be stored in 2 Forms<\/span><\/p>\n<p><span style=\"font-weight: 400\">A flat file<\/span><\/p>\n<p><span style=\"font-weight: 400\">A Database<\/span><\/p>\n<p><strong>Blockchain Interview Questions for Freshers &#8211; Q. 11,12,13,14,16,17,18,19,20<\/strong><\/p>\n<p><strong>Blockchain Interview Questions for\u00a0Experienced &#8211; Q. 15<\/strong><\/p>\n<p><strong>Q 21. In Blockchain, blocks are linked in what series?<\/strong><\/p>\n<p><span style=\"font-weight: 400\">In Blockchain Blocks are arranges within the Backward to the previous block series.<\/span><\/p>\n<p><strong>Q 22. What is the primary benefit of immutability?<\/strong><\/p>\n<p><span style=\"font-weight: 400\"> There are plenty of benefits of immutability but the foremost basic benefit is increased efficiency.<\/span><\/p>\n<p><strong> Q 23.\u00a0\u00a0Is it true that a block in the blockchain can never have more than one parent block?<\/strong><br \/>\nYes, it&#8217;s true that Blockchain can never have a parent Block. Each and each block is independent in Blockchain<\/p>\n<p><strong>Q 24. State an example of asymmetric encryption Algorithm?<\/strong><\/p>\n<p>The example of asymmetric is RSA<\/p>\n<p><strong>Q 25. What are some of the widely used cryptographic algorithms?<\/strong><\/p>\n<p>Some of the most usually used algorithms are<\/p>\n<ul>\n<li>RSA<\/li>\n<li>Triple DES<\/li>\n<li>Blowfish<\/li>\n<li>Twofish<\/li>\n<li>AES<\/li>\n<\/ul>\n<p><strong>Q 26. What are the various approaches employed in attacking the RSA algorithm?<\/strong><\/p>\n<p>There square measure totally different approaches employed in assaultive the RSA algorithm:<\/p>\n<p>Brute force: It involves all potential secret keys<\/p>\n<p>Mathematical attacks: In mathematical attack, we tend to square measure mistreatment totally different techniques, that is analogous in the effort to issue the merchandise of 2 primes<\/p>\n<p><strong>Q 27. Explain the importance of blind signature and the way it&#8217;s useful?<\/strong><\/p>\n<p>It is a type of digital signature within which the content of a message is disguised (blinded) before it&#8217;s signed. The ensuing blind signature may be publically verified against the first, unblinded message within the manner of a daily digital signature.<br \/>\nBlind signatures are generally used in privacy-related protocols where the signer and message author are totally different parties. Examples include cryptographic election systems and digital money schemes.<\/p>\n<p><strong><a href=\"https:\/\/data-flair.training\/blogs\/lisk-cryptocurrency\/\">Let&#8217;s revise Lisk Cryptocurrency<\/a><\/strong><\/p>\n<p><strong>Q 28. What is Secret Sharing? Will it have any benefit in Blockchain technology?<\/strong><\/p>\n<p>It is a widely known indisputable fact that security matters tons in digital transactions. Secret sharing is associate approach meant for same. In Blockchain technology it&#8217;s an associate approach that divides secret or personal data into totally different units and sent them to the users on the network.<\/p>\n<p>The original data will solely be mixd once a participant to whom a share of the key is allotted conform to combine them at the side of others. Their square measure many security-related edges it offers in Blockchain technology.<\/p>\n<p><strong>Q 29. Can you make a case for what square measure off-chain transactions?<\/strong><\/p>\n<p>Off-chain dealing is that the movement of value outside of the blockchain. while associate on-chain dealings \u2013 usually observed as merely \u2018a transaction\u2019 \u2013 modifies the blockchain associated depends on the blockchain to see its validity an off-chain transaction depends on alternative ways to record and validate the transaction.<\/p>\n<p><strong>Q 30. What precisely does one know about executive accounting? Does Blockchain support the same?<\/strong><\/p>\n<p>Executive accounting is nothing, however, a special form of accounting that is intended solely for a business that provides services to the individuals. There\u2019s no strict higher limit on services and a business will manage any through the management accounting. Blockchain has algorithms that are specially meant to handle government accounting. In fact, it cut down several issues that are related to the same.<\/p>\n<p><strong>Blockchain Interview Questions for Freshers &#8211; Q. 21,22,23,24,25,27,29<\/strong><\/p>\n<p><strong>Blockchain Interview Questions for\u00a0Experienced &#8211; Q. 26,28,30<\/strong><\/p>\n<p>So, this was all about Blockchain interview questions and answers. Hope this helps you.<\/p>\n<p><strong><a href=\"https:\/\/data-flair.training\/blogs\/zcash-cryptocurrency\/\">Explore Zcash Cryptocurrency<\/a><\/strong><\/p>\n<h2>3. Conclusion<\/h2>\n<p>Hence, in this Blockchain interview questions, we saw most tricky questions for Blockchain interview. Moreover, we gave Blockchain interview questions for freshers as well as experienced. Hope or explanation helps you to crack you Blockchain interview. Still, if any doubt, ask in the comment tab.<\/p>\n<p><strong>See also &#8211;<\/strong><\/p>\n<p><a href=\"https:\/\/data-flair.training\/blogs\/blockchain-interview-questions-and-answers\/\"><strong>Blockchain Interview Questions &amp; Answers Part 2<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1. Objective &#8211; Blockchain Interview Questions So, we completed our journey of Blockchain Technology. Today, we will discuss the best 30 Blockchain interview questions with their answers. These Mostly asked Interview questions for Blockchain&#46;&#46;&#46;<\/p>\n","protected":false},"author":6,"featured_media":19150,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[6972,11114,14808,14809,14913],"class_list":["post-19127","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blockchain","tag-interview-questions-in-blockchain","tag-questions-on-blockchain-technology","tag-top-blockchain-interview-questions","tag-top-blockchain-questions","tag-tricky-blockchain-interview-questions"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Top 30 Blockchain Interview Questions - For Freshers to Experienced - DataFlair<\/title>\n<meta name=\"description\" content=\"Blockchain interview questions &amp; answers, free online mock test for Blockchain, what questions to ask about Blockchain, practice for Blockchain\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/data-flair.training\/blogs\/blockchain-interview-questions\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Top 30 Blockchain Interview Questions - For Freshers to Experienced - DataFlair\" \/>\n<meta property=\"og:description\" content=\"Blockchain interview questions &amp; 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