{"id":8651,"date":"2019-01-15T17:24:26","date_gmt":"2019-01-15T17:24:26","guid":{"rendered":"https:\/\/www.monsterindia.com\/career-advice\/8-important-dbms-interview-questions-for-techies-8651\/"},"modified":"2021-11-23T07:22:40","modified_gmt":"2021-11-23T07:22:40","slug":"8-important-dbms-interview-questions-for-techies","status":"publish","type":"post","link":"https:\/\/www.foundit.com.ph\/career-advice\/8-important-dbms-interview-questions-for-techies\/","title":{"rendered":"8 Important DBMS Interview Questions for techies"},"content":{"rendered":"\n

<\/span><\/p>\n\n\n\n

Congratulations on reaching the interview stage. It’s surely a great achievement to get here as it is a testament to the fact that you have met the organisation’s key selection requirements. However, don’t rest on your laurels just yet. A DBMS job interview gives you the chance to convince your future employer that you\u2019re the right fit for the position. One sure-shot way to succeed is to prepare really well for the interview. <\/span><\/p>\n\n\n\n

Here we list eight essential DBMS interview questions to help you in your next interview. <\/span><\/p>\n\n\n\n

1. Can you explain two key differences between DBMS and RDBMS? <\/span><\/strong><\/span><\/p>\n\n\n\n

\u2022 While DBMS store data as files, RDBMS on the other hand, stores data in a tabular form while also providing relationship integrity. <\/span><\/p>\n\n\n\n

\u2022 The concept of normalisation doesn’t exist in DBMS while it’s present in RDBMS. <\/span><\/p>\n\n\n\n

2. Can you point out how many types of database languages exist?<\/strong> <\/span><\/p>\n\n\n\n

There are essentially four types of database languages: <\/span><\/p>\n\n\n\n

\u2022 Data Definition Language (DDL) <\/span>
\u2022 Data Manipulation Language (DML) <\/span>
\u2022 DATA Control Language (DCL) <\/span>
\u2022 Transaction Control Language (TCL) <\/span><\/p>\n\n\n\n

3. Can you explain the integrity rules in DBMS? <\/span><\/strong><\/span><\/p>\n\n\n\n

There are two primary integrity rules that exist in DBMS: <\/span><\/p>\n\n\n\n

\u2022 Entity Integrity: It states that “Primary key can never have a NULL value.” <\/span><\/p>\n\n\n\n

\u2022 Referential Integrity: It specifies that “The value of a Foreign Key can either be a NULL value or should be the primary key value of any other relation.\u201d <\/span><\/p>\n\n\n\n

4. Can you describe what BCNF is in the DBMS? <\/span><\/strong><\/span><\/p>\n\n\n\n

BCNF stands for the Boyce Codd Normal Form. Considered to be an advanced form of 3NF, BCNF is stricter than the 3NF. At times, it\u2019s also called as 3.5NF. <\/span><\/p>\n\n\n\n

In addition, any table is said to comply with BCNF if it satisfies the following two conditions: <\/span><\/p>\n\n\n\n

\u2022 If it is in the 3NF. <\/span>
\u2022 For every functional dependency X->Y, where X is the super key of a table. <\/span><\/p>\n\n\n\n

5. Can you describe the different phases of a Transaction? <\/span><\/strong><\/span><\/p>\n\n\n\n

Every transaction has three different phases: <\/span>
\u2022 Analysis phase <\/span>
\u2022 Redo phase <\/span>
\u2022 Undo phase <\/span><\/p>\n\n\n\n

You may also like:<\/strong> 6 Questions to ask at the end of your Job Interview<\/a><\/p>\n\n\n\n

6. Can you list out the different types of keys? <\/span><\/strong><\/span><\/p>\n\n\n\n

There are seven types of keys available.
<\/span>
\u2022 Primary key <\/span>
\u2022 Candidate key <\/span>
\u2022 Super key <\/span>
\u2022 Alternate Key <\/span>
\u2022 Unique Key <\/span>
\u2022 Composite\/Compound Key <\/span>
\u2022 Foreign key <\/span><\/p>\n\n\n\n

7. Can you touch upon the different type of relationships that exist in DBMS? <\/span><\/strong><\/span><\/p>\n\n\n\n

DBMS relationships are used to portray an association between the tables. The various relationship types are as under: <\/span><\/p>\n\n\n\n

\u2022 One-to-One <\/span>
\u2022 One-to-Many <\/span>
\u2022 Many-to-Many <\/span><\/p>\n\n\n\n

8. Can you list out the various levels of data abstraction? <\/span><\/strong><\/span><\/p>\n\n\n\n

There are three levels of data abstraction: <\/span><\/p>\n\n\n\n

\u2022 Physical level: Considered to be the lowest level of abstraction, this level explains the storage of data. <\/span><\/p>\n\n\n\n

\u2022 Logical level: The next level of abstraction, this level explains the contents of the data that is stored in the database as well as describing the relationship between them. <\/span><\/p>\n\n\n\n

\u2022 View level: Considered to be the highest level of data abstraction, this level only describes a part of the entire database. <\/span><\/p>\n\n\n\n

We want to ensure you go in fully prepared for your DBMS interview leaving nothing to chance. Hence, we have compiled an additional list of eight frequently asked DBMS Interview questions that will surely leave you in a position of strength before your all-important DBMS interview. <\/span><\/p>\n\n\n\n

\u2022 Explain the concept of data abstraction in DBMS <\/span>
\u2022 Can you touch upon the concept of the functionality of DML Compiler? <\/span>
\u2022 Can you explain what durability means in DBMS? <\/span>
\u2022 What does transparent DBMS mean? <\/span>
\u2022 What does data warehousing mean? <\/span>
\u2022 What is 1NF, 2NF, and 3NF? <\/span>
\u2022 Explain what a stored procedure is <\/span>
\u2022 Describe the communication process with RDBMS? <\/span><\/p>\n\n\n\n

Before going in for that crucial DBMS interview, make it a point to review the answers you have prepared. While you\u2019re at it, try and figure out new innovative ways to showcase your skills and experience to your prospective employer as well. Sometimes all it needs to crack an interview is to try a different approach.<\/span><\/p>\n\n\n\n


Looking for DBMS Jobs in top cities? Click at the links below:
<\/strong><\/span>
\u2022 DBMS Jobs in Hyderabad<\/a><\/span>
\u2022 DBMS Jobs in Mumbai<\/a><\/span>
\u2022 DBMS Jobs in Chennai<\/a><\/span>
\u2022 DBMS Jobs in Bangalore<\/a><\/span>
\u2022 DBMS Jobs in Pune<\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Congratulations on reaching the interview stage. It’s surely a great achievement to get here as it is a testament to the fact that you have met the organisation’s key selection requirements. However, don’t rest on your laurels just yet. A DBMS job interview gives you the chance to convince your future employer that you\u2019re the […]<\/p>\n","protected":false},"author":1,"featured_media":8652,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[147],"tags":[],"class_list":{"0":"post-8651","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-interview-questions"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.foundit.com.ph\/career-advice\/wp-json\/wp\/v2\/posts\/8651","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.foundit.com.ph\/career-advice\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.foundit.com.ph\/career-advice\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.foundit.com.ph\/career-advice\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.foundit.com.ph\/career-advice\/wp-json\/wp\/v2\/comments?post=8651"}],"version-history":[{"count":1,"href":"https:\/\/www.foundit.com.ph\/career-advice\/wp-json\/wp\/v2\/posts\/8651\/revisions"}],"predecessor-version":[{"id":10149,"href":"https:\/\/www.foundit.com.ph\/career-advice\/wp-json\/wp\/v2\/posts\/8651\/revisions\/10149"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.foundit.com.ph\/career-advice\/wp-json\/wp\/v2\/media\/8652"}],"wp:attachment":[{"href":"https:\/\/www.foundit.com.ph\/career-advice\/wp-json\/wp\/v2\/media?parent=8651"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.foundit.com.ph\/career-advice\/wp-json\/wp\/v2\/categories?post=8651"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.foundit.com.ph\/career-advice\/wp-json\/wp\/v2\/tags?post=8651"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}