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

• 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

• In a database, columns are called Fields or Attributes.
• A field represents a single type of data in a table (like Name, Age).
• Each column stores a specific attribute of records.
• Fields define the structure of the database table.

Additional information:

• In a database, rows are called Records or Tuples.

Last verified on 24-06-2026

Explanation

• Alan Turing is known as the father of Computer Science.
• He is known for his foundational work in computing theory.
• He introduced key ideas of algorithms and machine computation.
• His work contributed to the development of modern computers and artificial intelligence (AI).
• He also played an important role in World War II code-breaking efforts.

Last verified on 24-06-2026

Explanation

• The Turing Test was introduced by Alan Turing in 1950.
• It is used to check machine intelligence.
• It is based on whether a machine can imitate human conversation.
• If a human cannot distinguish machine from human, the machine is considered intelligent.
• This idea was presented in his paper “Computing Machinery and Intelligence”.

Last verified on 24-06-2026

Explanation

• The Turing Test was introduced by Alan Turing in 1950.
• It is used to check machine intelligence.
• It is based on whether a machine can imitate human conversation.
• If a human cannot distinguish machine from human, the machine is considered intelligent.
• This idea was presented in his paper “Computing Machinery and Intelligence”.

Last verified on 24-06-2026

Explanation

• Microsoft Office is not an open source software.
• Because its source code is owned and controlled by Microsoft.
• Open source software allows users to view, modify, and distribute its source code.

Additional information:

Open source examples:

• Android
• Linux OS
• LibreOffice
• Mozilla Firefox
• Apache Web Server

Closed-source examples:

• Microsoft Windows
• Microsoft Office
• Adobe Photoshop

Last verified on 24-06-2026

Explanation

• Base (Radix): 2
• Digits used: 0, 1
• Used in: Computers, programming, digital circuits
• Each digit is called a bit (binary digit)
• Example: 1011₂

Last verified on 07-06-2026

Explanation

• B2C stands for Business to Consumer in e-commerce.
• It refers to transactions where businesses sell products or services directly to customers.
• It is the most common online shopping model.
• Examples include online retail stores like Amazon-type platforms.

Last verified on 24-06-2026