Technical interview questions and answers section on "DBMS Basics" with explanation for various interview, competitive examination and entrance test. Solved. I can only answer about DBMS. I faced Arcesium interview where I told my favorite subject as DBMS. So, yeah, my half an hour interview was about DBMS. SQL Interview Questions - Learn SQL (Structured Programming Language) in simple and easy steps starting from basic to advanced concepts with examples.


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They may ask about various types of key like super key,primary key and candidate key and there is a one famous question what is the difference between primary key and unique key? While browsing, transactions must not be opened of data.

Top 50 Database Interview Questions & Answers – DBMS

Transactions must be kept as small as possible. Lower transaction segregation levels. Least information of data must be accessed while transacting.

Executive plan can be defined dbms concepts for interview SQL Server caches collected procedure or the plan of query execution and used thereafter by subsequent calls.

An important feature in relation to performance enhancement. Data execution plan can be viewed textually or graphically.

A data structure in the form of tree which stores sorted data and searches, insertions, sequential access and deletions are allowed in logarithmic time. Iterating over all the table rows is called Table Scan while iterating over all the index items is defined as Dbms concepts for interview Scan.

Fill Factor can be defined as being that value which defines the percentage of left space on every leaf-level page that is to be packed with data. Fragmentation can be defined as a database feature of server that promotes control on data which is stored at table dbms concepts for interview by the user.

It is a collection of programs that enables user to create and maintain a database. Then inner tavle is assigned to the outer table and every row in inner column is accessible from every row of outer table.

Dbms concepts for interview loop is executed from hash join, inner loop and then outer loop.

What would be the result? What is the difference between cross joins and natural joins? The cross join produces the cross product or Cartesian product of two tables.

SQL Interview Questions

The natural join is based on all the columns having same name and data types in both the tables. What is the purpose of the group functions in SQL?


Give some examples of group functions. Group functions in SQL work on sets of rows and returns one result per group. Say True or False.