Explanation

• Facial recognition is a prime example of Artificial Intelligence (AI).
• It uses AI algorithms to detect, analyze, and identify human faces.
• The technology compares facial features with stored data for identification or verification.
• It is widely used in security systems, smartphones, airports, and surveillance.

Last verified on 07-07-2026

Explanation

• Bluetooth is a Personal Area Network (PAN) technology used for short-range communication.
• It connects devices within a range of about 10 meters.
• It is commonly used in headphones, mobile phones, and laptops.
• It works without cables using wireless signals.

Last verified on 24-06-2026

Explanation

• A Foreign Key is a field in one table that refers to the Primary Key of another table.
• It is used to create a relationship between two database tables.
• A foreign key helps maintain referential integrity by ensuring valid data links.

Additional information:

• Primary Key: Uniquely identifies each record in a table.
• Candidate Key: A field that can become a primary key.
• Composite Key: A key made from two or more columns.
• Super Key: One or more columns that uniquely identify a record.

Last verified on 06-07-2026

Explanation

• Cache memory is located on the CPU to provide very fast access to frequently used data and instructions.
• It is much faster than RAM but has less storage capacity.
• Cache memory helps improve the overall speed and performance of the computer.
• It stores frequently accessed data temporarily.

Last verified on 06-07-2026

Explanation

Networks are typically classified into four main types based on distance (geographical coverage):

1. PAN (Personal Area Network) – Very short distance (e.g., Bluetooth, USB connections).
2. LAN (Local Area Network) – Limited area (e.g., home, office, or school network).
3. MAN (Metropolitan Area Network) – City-wide coverage (e.g., ISP networks in a city).
4. WAN (Wide Area Network) – Large-scale, global reach (e.g., the Internet).

Last verified on 08-06-2026

Explanation

• The first row in an HTML table is called the Heading (Header Row).
• It usually contains table headings created with the <th> tag.
• The headings describe the content of each column.
• Data in the remaining rows is generally written using the <td> tag.

Last verified on 06-07-2026

Explanation

• HTTPS (SSL/TLS) is used to establish a secure channel of communication over a potentially insecure network.
• SSL (Secure Sockets Layer) and TLS (Transport Layer Security) are cryptographic protocols.
• They encrypt data to protect it from hackers during transmission.
• They ensure data confidentiality, integrity, and authentication.
• Commonly used in secure websites (HTTPS connections).

Last verified on 08-06-2026

Explanation

• SQR stands for Structured Query Reporter.
• It is a report-writing and programming language used to generate reports from databases.
• SQR is commonly associated with Oracle/PeopleSoft applications.
• It supports SQL queries, calculations, formatting, and report generation.

Additional information:

• SQL – Structured Query Language
• DBMS – Database Management System
• RDBMS – Relational Database Management System
• DDL – Data Definition Language

Last verified on 26-04-2026

Explanation

• Google Chrome is not antivirus software; it is a web browser.
• Antivirus software protects computers from viruses, malware, spyware, and other cyber threats.
• Chrome is mainly used for browsing websites on the internet.

Popular Antivirus Software (Examples)

• Norton
• McAfee
• Avast
• Kaspersky
• Bitdefender

Last verified on 02-07-2026

Explanation

• Hard disk storage devices can store a maximum amount of data.
• It has the highest capacity to store data up to 2 Terabytes.
• It is an electromechanical data storage device that stores and retrieves digital data using magnetic storage.

Last verified on 02-07-2026