Database/DBMS Interview Questions And Answers

Database/DBMS Interview Questions And Answers - Part I.

1) What Is A Database?

Answer: A database is a logically coherent collection of data with some inherent meaning, representing some aspect of real world and which is designed, built and populated with data for a specific purpose.

In Simple words, database can be your contact book in your mobile, your address book in your laptops. Simple example of database can be: Data collected, maintained and used in airline or railway reservation.

2) What Is DBMS & Database?

Answer: DBMS Stands for "Database Management System". DBMS is a collection of programs that enables user to create and maintain a database. In other words, DBMS is a complex software system that is used to manage, store and manipulate data and metadata used to describe the data.

The DBMS manages the interaction between the end user and the database.

The database and DBMS software together is called as Database system.

3) What Are The Advantages Of DBMS?

Answer: Some of the advantages of DBMS are:

Redundancy is controlled: Duplicating of data is controlled in DBMS by which the data extraction becomes easy.

Consistency: On controlling of data repetition the data reliability increases and time taken for any operation is completed in less time and extracted data is accurate.

Sharing: One more advantage is the data can be shared among the N number of users who are authorized with restrictions as per there requirement. Unauthorized access is restricted.

Integration: data is stored in form of tables and we can have N number of tables all these tables can be linked with other tables by using keys this makes the retrieval of data easy.

Some other advantages are:

Provides multiple user interfaces.
Enforces integrity constraints.
Provides backup and recovery.

4) What Are The Disadvantages In File Processing System?

Answer: Some of the disadvantages in file processing system are:

Data redundancy & inconsistency.
Difficult in accessing data.
Data isolation.
Data integrity.
Concurrent access is not possible.
Limited Data Sharing & Security Problems.
Excessive Program Maintanence

5) Discuss How To Know When There Is A Need Of DBMS & When There Is Not?

Answer: Use a DBMS when the following points are important and necessary:

Persistent storage of data.
Centralized control of data.
Control of redundancy, consistency and integrity.
Multiple user support.
Sharing of data.
Data independence and data documentation.
Control of access and security.
Backup and recovery.

Don’t go for DBMS when the following points becomes important and necessary:

Multiple user access is not needed / required.
Data and applications are simple and stable.
The initial investment in hardware, software and training is too high.

ALSO CHECK THE BELOW FAQ's:

6) What Is Parallel & Distributed Database? Differentiate Them.
7) Differentiate Between File-Oriented System & Database System?
8) What Are The Applications Of Databases?
9) What Is The Importance Of Databases?
10) What Is DBMS & RDBMS?

11) What Are The Three Types Of Users In DBMS?
12) What Are The Disadvantages Of Database System?
13) Describe The Three Levels Of Data Abstraction?
14) Discuss About External/ View/Individual Level Of The Architecture?
15) Discuss About Logical/ Conceptual Level Of The Architecture?

... Return To DBMS FAQ's Main Page.

... Return To HR Interview Questions With Answers Main Page.

Tell Me Something About Yourself - Interview Answers.

Try to introduce some of your most important employment-oriented skills as well as your education and accomplishments to the interviewer. Answer to this question is very important because it positions you for the rest of the interview . That's why this statement is often called the "Positioning Statement". One should take the opportunity to show his/her communication skills by speaking clearly and concisely in an organized manner. Since there is no right or wrong answer for this question hence it is important to appear friendly. YOUR ANSWERS CAN BE: 1) I am a person with strong interpersonal skills and have the ability to get along well with people . I enjoy challenges and looking for creative solutions to problems. 2) Besides the details given in my resume, I believe in character values, vision and action. I am quick in learning from mistakes. I am confident that the various tests that you have conducted will corroborate my competencies apti...

What Is (Are) Your Weakness (Weaknesses)? - Interview Answers

There’s a saying – “However small the thorn maybe it has the ability to pierce.” Never say you are a Workaholic, a Perfectionist, etc. because it sounds negative. Try to convert these negative biased qualities into positive ones. For Example, In place of Workaholic you can say you are a hard worker and always willing to work for extra hours. In place of Perfectionist , you can say you are detail oriented and like to set high standard for work. “Try to specify your weakness as your strength and also highlight it as a benefit.” Your answers can be: 1) One of my weaknesses as I perceive is occasional compromise on time for quality and perfection. 2) I feel I am not very detail-oriented . I’m a person that wants accomplish as much as possible. I realized this hurts quality and therefore I‘m trying hard to find a balance between quality and quantity. 3) At times even when I need help, I try to solve my own problems instead of asking a co-worker who might know...

What Is (Are) Your Strengths? - Interview Answers

This is a simple and popular interview question. Generally people answer it in two ways. There are people who simply state their strength like “I am Young, Dynamic, Intelligent, Smart and so on…”. Such answer is neither right nor wrong but does not help u in any way also. Secondly there are peoples who state their strengths and explain them how he can use his strength for the job and industry. Do not simply state your strength. Everyone has some strength, all you need is to convert them into benefits. In short, try to advertise yourself by converting your features into strengths. “EVERYONE CLAIM THEY ARE HONEST, HARDWORKING, SMART AND SO ON….. BUT WITH AN EXAMPLE IT IS MUCH MORE BELIEVABLE.” Your answers can be : 1) I am a hard worker and because of this ability I can work for additional hours to accomplish my tasks.I am commitment oriented and hence I always enjoy the trust and confidence of my team mates which enables me to perform my duties very easily. 2) I am a...

HR & Technical Interview Questions With Answers.

Search This Blog