Database Questions And Answers

  

By: Prof. Fazal Rehman Shamil
Last modified on October 21st, 2020

DBMS is a collection of that enables user to create and maintain a database. Relational Database Management System (RDBMS) is the most common database used across organizations, making SQL a must-have skill. This blog on SQL Interview Questions and answers aims to guide you through various SQL questions from concepts, such as MS SQL Server, MySQL database, etc.

  1. Database interview questions are open-ended questions asked by an interviewer to assess your expertise in database management. Depending on your answers, the interviewer will decide if your database knowledge aligns with the organization’s needs.
  2. Dear Readers, Welcome to Database Interview questions with answers and explanation. These 25 solved Database questions will help you prepare for technical interviews and online selection tests during campus placement for freshers and job interviews for professionals.

Here, i am sharing with you some important Database Management System MCQ’s type questions answers.

Questions

1) DCL stands for

  1. Data Control Language
  2. Data Console Language
  3. Data Control Level
  4. Data Console Level
1

2) A ……… is used to define overall design of the database

  1. Schema
  2. Application program
  3. Data definition language
  4. None of the above
1

3) …………… database is used as template for all databases created.

  1. Master
  2. Model
  3. Temp DB
  4. None of the above
1

4) Which of the following is/are the DDL statements?

  1. Create
  2. Drop
  3. Alter
  4. All of the above
4
Database test question and answers

5) The database environment has all of the following components except.

  1. Users
  2. Database
  3. Database Administration
  4. Separate files
1

6) Related fields in a database are grouped to form a

  1. Data file
  2. Data record
  3. Menu
  4. None of the above
2

7) The way a particular application views the data from the database that the application uses is

  1. Module
  2. Relational model
  3. Schema
  4. Sub Schema
4

8) A shared collection of logically related data.

  1. Data Base
  2. Mark Sheet
  3. Result
  4. Record
4

9) The Description of the Data is known as.

  1. System Catalog
  2. File
  3. Dictionary
  4. Tech
1

10) A software system that enables users to define, create, maintain, and control Access to the database.

  1. Database Management System
  2. Data Management
  3. Filing system
  4. Record
1

11. Which of the following is a physical storage media?
a) Tape Storage
b) Optical Storage
c) a and b
d) RAM

C

12. The time for repositioning the arm is called ___ and it increases with the distance that the arm must move.
a) Access time
b) Seek time
c) Average seek time
d) Burst time

B

13. In Flash memory, the erase operation can be performed on a number of pages, called an _______ at once, and takes about 1 to 2 milliseconds.
a) Delete block
b) Read block
c) Flash block
d) Erase block

D

14. A major goal of the database system is to minimize the number of block transfers between the disk and memory. This can be achieved by which of the followings;
a) Secondary storage
b) Catalog
c) Storage
d) Buffer

D

Oracle Database Questions And Answers

15. Which of the following is the smallest unit of allocation in an Oracle database?
a) Database
b) Database Block
c) Tablespace
d) Instance

B

16.The time factor when determining the efficiency of an algorithm is measured by
a) Counting microseconds
b) Counting the number of statements
c) Counting the number of key operations
d) Counting the kilobytes of algorithm

C

17. Which of the following fixed database roles can add or remove user IDs?
a) db_setupadmin
b) db_securityadmin
c) db_accessadmin
d) db_sysadmin

C

Which data model which define how the data is actually stored is

A logical model
B external model
C internal model
D none of these
E All of these

Answer: C
Data about data is called

A directory
B data bank
C both a and b
D none of the above
E meta data

Answer: D

which scheme is for hierarchical database

A a B-tree
B a graph
C a tree
D both a and b
E none of the above

Answer: C
Select the example of network database

A IDMS
B Ingress
C Unify
D both a and b
E None of the above

Answer: A
Select valid record-based data model

A Object-oriented model
B object related model
C Entity-relationship model
D both a nad b
E Relational mode

Answer: B
SET concept used in _________?

A Relational model
B Hierarchical model
C Network model
D both a and b
E None of the above

Answer: C

A view of database that appears to an application program is called:

A schema
B low schema
C virtual table
D both a and b
E subschema

Answer: D
Select the DBMS, which provide supports full-fledged client server application development

A dBASEIV
B Ingress
C FoxPro 2.1
D Oracle 7.1
E none of the above

Answer: D
In database a top-to-bottom relationship between the items is formed by a

A Relational schema
B Network schema
C Hierarchical schema
D All of the above
E none of these

Answer: C
Which level of data abstraction which define how the data is actually stored is

A conceptual level
B file level
C physical level
D none of these
E all of the above Free download mptool software.

Answer: Option C
group of information stored in a database at a specific moment is

A instance
B schema
C view
D both a and b
E None of the above

Answer: A

The user querry syantax is varified by

A query optimizer
B parser
C DBA
D DBMS
E None of the above

Answer: B
Which statement is correct about data model:

A Set of basic operations on the database
B Used to describe structure of a database
C Both A and B
D All of the above
E None of these

Answer: C
In a hierarchical database, a hashing function is used for location________?:

A Primary key
B Collisions
C Root
D Duplicate records
E all of the above

Database Questions And Answers

Answer: C
DBA abbrivated as Database Administrator

A Data Bank Access
B Database Access
C Data Bank Administration
D Database Administrator
E none of the above

Question

Answer: Option A
identify properties of entities

A Attributes
B Table
C Groups
D Switchboards
E all of the aabove

Answer: A

DBMS will act as between the users and the database

A barrier
B obstacle
C referee
D interface
E none of the above

Answer: D
Select object that not belong to database

A cursor
B sequence
C index
D trigger
E all of the above

Answer: A

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