Database Management System DBMS

4 followers study24x7

25 Nov 2024 11:24 AM study24x7

What is a common challenge when integrating IoT devices with real-time databases, and how can it be addressed?

A

Data volume exceeds storage capacity; addressed by increasing storage space

B

Data arrives faster than it can be processed; addressed by implementing stream processing solutions

C

IoT devices use incompatible data formats; addressed by standardizing data formats

D

All devices require constant internet connection; addressed by creating offline data processing capabilities

Databases

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Database Management System DBMS

4 followers study24x7

25 Nov 2024 11:22 AM study24x7

How can "query sprawl" in big data applications be managed effectively?

A

By limiting the number of users accessing the database

B

By using stricter schema definitions

C

By optimizing query execution and caching frequently accessed data

D

By reducing the size of the dataset

Databases

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Database Management System DBMS

4 followers study24x7

25 Nov 2024 11:21 AM study24x7

A NoSQL database's response times degrade as data volume grows.
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A

Normalizing the database schema

B

Implementing sharding or partitioning strategies

C

Converting the NoSQL database to a SQL database

D

Decreasing the write consistency level

Databases

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Database Management System DBMS

4 followers study24x7

20 Nov 2024 11:08 AM study24x7

How can you enable automatic scaling in a cloud-based NoSQL database service?

A

SET AUTOSCALE ON

B

MODIFY DATABASE SET SCALING=AUTOMATIC

C

UPDATE SCALING POLICY AUTO

D

Configure auto-scaling settings through the database's management console

Databases

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Database Management System DBMS

4 followers study24x7

20 Nov 2024 11:06 AM study24x7

What SQL extension is used to query JSON data within a PostgreSQL database?

A

JSON_QUERY

B

SELECT JSON

C

JSONB_PATH_QUERY

D

GET_JSON_ITEM

Databases

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Database Management System DBMS

4 followers study24x7

20 Nov 2024 11:05 AM study24x7

What is the significance of "Edge Computing" in the context of database technologies?

A

Reducing cloud computing costs

B

Increasing the physical security of data centers

C

Minimizing latency by processing data closer to the source of data generation

D

Maximizing the efficiency of centralized databases

Databases

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Database Management System DBMS

4 followers study24x7

19 Nov 2024 11:26 AM study24x7

How do distributed ledger technologies (such as blockchain) enhance data security in database applications?

A

By centralizing data storage

B

By making data immutable and enabling transparent access

C

By encrypting all stored data

D

By limiting data access to administrators

Databases

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Database Management System DBMS

4 followers study24x7

19 Nov 2024 11:25 AM study24x7

What differentiates Graph databases from traditional relational databases?

A

Graph databases use SQL for querying, while relational databases do not

B

Graph databases are primarily used for data warehousing

C

Graph databases are optimized for storing and querying data relationships

D

Relational databases cannot store complex, interconnected data

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Database Management System DBMS

4 followers study24x7

19 Nov 2024 11:24 AM study24x7

In the context of database technologies, what is a "Data Lake"?

A

A type of SQL database optimized for large-scale transactions

B

A storage repository that holds a vast amount of raw data

C

A new algorithm for data encryption

D

An advanced form of data masking technique

Databases

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Database Management System DBMS

4 followers study24x7

14 Nov 2024 11:58 AM study24x7

Which technology is commonly associated with real-time analytics and data processing?

A

Hadoop Distributed File System (HDFS)

B

Online Analytical Processing (OLAP)

C

Stream Processing

D

Data Warehousing

Databases

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Database Management System DBMS

4 followers study24x7

14 Nov 2024 11:55 AM study24x7

How can SQL injection vulnerabilities be prevented?

A

Validating user inputs

B

Sanitizing user inputs

C

Using prepared statements

D

Sanitizing and using prepared statements

Databases

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Database Management System DBMS

4 followers study24x7

14 Nov 2024 11:54 AM study24x7

How can "privilege escalation" vulnerabilities be addressed?

A

Regular database software updates

B

Strict password policies

C

Regular security audits

D

Security patch implementation

Databases

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Database Management System DBMS

4 followers study24x7

13 Nov 2024 10:43 AM study24x7

A user reports losing access to a table.
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A

Permissions were revoked

B

The table was deleted

C

Database restored to a previous state

D

Permissions error

Databases

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Database Management System DBMS

4 followers study24x7

13 Nov 2024 10:42 AM study24x7

How do you revoke all privileges from a user in SQL?

A

REVOKE ALL PRIVILEGES FROM user_name

B

REVOKE ACCESS FROM user_name

C

REMOVE ALL PRIVILEGES user_name

D

DENY ALL FROM user_name

Databases

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Database Management System DBMS

4 followers study24x7

13 Nov 2024 10:41 AM study24x7

How do you create a new user with specific privileges in MySQL?

A

CREATE USER 'user_name' IDENTIFIED BY 'password'; GRANT privileges ON database_name.* TO 'user_name'

B

CREATE USER 'user_name' WITH privileges

C

USE 'user_name' WITH privileges

D

INITIATE USER 'user_name' WITH privileges

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Database Management System DBMS

4 followers study24x7

12 Nov 2024 10:37 AM study24x7

How can you grant a user read-only access to a specific table in SQL?

A

GRANT SELECT ON table_name TO user_name

B

ALTER TABLE table_name ALLOW READ FOR user_name

C

ENABLE READ ON table_name TO user_name

D

SET READ PERMISSION ON table_name FOR user_name

Databases

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Database Management System DBMS

4 followers study24x7

12 Nov 2024 10:36 AM study24x7

How does role-based access control (RBAC) enhance database security?

A

By encrypting all data

B

By allowing unrestricted access

C

By assigning permissions to roles, not individuals

D

By using complex passwords

Databases

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Database Management System DBMS

4 followers study24x7

12 Nov 2024 10:35 AM study24x7

What mechanism manages and validates user access in a database?

A

Data encryption algorithms

B

Data indexing strategies

C

Authentication and authorization

D

Data normalization techniques

Databases

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Database Management System DBMS

4 followers study24x7

11 Nov 2024 12:04 PM study24x7

What is SQL injection?

A

A method for encrypting SQL queries

B

A technique for improving SQL query performance

C

An attack by inserting malicious SQL into a query

D

A query optimization tool

Databases

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Database Management System DBMS

4 followers study24x7

11 Nov 2024 12:01 PM study24x7

Which database security feature limits data exposure by hiding certain data elements from unauthorized users?

A

Data masking

B

Data encryption

C

Data replication

D

Data indexing

Databases

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