Computer Science - PMS 2026 GK (Q701-750): Telecommunications, Networking, Internet Protocols, Cloud, Security & Emerging Technologies MCQs

Correct Answer: Transmission of information over distances

Telecommunication refers to the transmission of information over distances: sending voice, data or video between distant points by wire, radio or light.

Correct Answer: Data transfer rate

Bandwidth measures the data transfer rate: how much data a connection can carry in a given time, usually in bits per second.

Correct Answer: Identify devices on a network

An IP address is used to identify devices on a network: each connected device gets a unique address so data can reach it.

Correct Answer: Network interface card (NIC)

A MAC address identifies a network interface card (NIC): the hardware address built into the device's network adapter.

Correct Answer: Domain Name System

DNS stands for Domain Name System: the system that turns human-readable domain names into IP addresses.

Correct Answer: Domain names into IP addresses

DNS translates domain names into IP addresses: when you type a website name, DNS finds the numerical address of its server.

Correct Answer: Accessing web pages

HTTP is used for accessing web pages: the protocol browsers use to request and receive pages from web servers.

Correct Answer: Secure communication over internet

HTTPS provides secure communication over the internet: HTTP protected by encryption, so data between browser and server cannot easily be read or altered.

Correct Answer: Sending emails

SMTP is used for sending emails: the protocol mail clients and servers use to send outgoing mail.

Correct Answer: Receiving emails

POP3 is used for receiving emails: the protocol that downloads incoming mail from a server to the user's device.

Correct Answer: Accessing emails on server

IMAP is used for accessing emails on a server: mail stays on the server and can be read from any device, unlike POP3 downloads.

Correct Answer: Cat5, Cat5e, Cat6

LAN cable types include Cat5, Cat5e and Cat6: twisted-pair Ethernet cable grades used to wire local networks.

Correct Answer: Light signals for high-speed data

Fiber optic uses light signals for high-speed data: pulses of light carry data through thin glass fibres at very high speeds.

Correct Answer: Radio waves

Wi-Fi uses radio waves: it sends data over radio-frequency bands, typically 2.4 GHz and 5 GHz.

Correct Answer: Short-range wireless communication

Bluetooth is used for short-range wireless communication: linking nearby devices such as phones, headsets and keyboards.

Correct Answer: On remote servers

Cloud computing stores data on remote servers: files and services are kept in data centres and reached over the internet.

Correct Answer: Large & complex datasets

Big Data refers to large and complex datasets: data too large or fast-moving for ordinary tools to store and analyse easily.

Correct Answer: Internet-connected smart devices

IoT devices are internet-connected smart devices: everyday objects with sensors that collect and exchange data online.

Correct Answer: Automation, robotics & data analysis

AI applications include automation, robotics and data analysis: systems that learn from data to perform tasks and make decisions.

Correct Answer: Artificial Intelligence

Machine Learning is a subset of Artificial Intelligence: AI systems that improve by learning patterns from data instead of following fixed rules.

Correct Answer: Security & privacy of data

Data encryption ensures security and privacy of data: it scrambles information so only authorised readers can use it.

Correct Answer: Systems, networks & data from attacks

Cybersecurity protects systems, networks and data from attacks: it defends computers and networks against hacking, malware and theft.

Correct Answer: Block unauthorized access

A firewall is used to block unauthorized access: it monitors network traffic and stops connections that are not allowed.

Correct Answer: Viruses, worms & trojans

Malware includes viruses, worms and trojans: malicious programs designed to harm computers or steal data.

Correct Answer: Sensitive user information

Phishing attacks target sensitive user information: fake messages trick people into revealing passwords, bank details or other private data.

Correct Answer: Manipulating people to reveal information

Social engineering is manipulating people to reveal information: attackers exploit trust and psychology rather than breaking software.

Correct Answer: SaaS, PaaS, IaaS

Cloud services include SaaS, PaaS and IaaS: software, platform and infrastructure delivered as services over the internet.

Correct Answer: Software as a Service

SaaS stands for Software as a Service: ready-to-use software delivered over the internet, such as webmail or online office tools.

Correct Answer: Platform as a Service

PaaS stands for Platform as a Service: a cloud platform with tools and infrastructure for developers to build and run applications.

Correct Answer: Infrastructure as a Service

IaaS stands for Infrastructure as a Service: rented computing infrastructure - servers, storage and networks - over the internet.

Correct Answer: Extracting patterns from data

Data mining is used for extracting patterns from data: analysing large datasets to find trends and relationships.

Correct Answer: Graphical representation of data

Data visualization shows a graphical representation of data: charts and graphs that make patterns in data easy to see.

Correct Answer: Managing relational databases

SQL is used for managing relational databases: it queries, inserts, updates and organises data in tables.

Correct Answer: MongoDB, Cassandra

NoSQL databases include MongoDB and Cassandra: non-relational databases designed for large, flexible or distributed data.

Correct Answer: Decentralized & secure transactions

Blockchain ensures decentralized and secure transactions: records are shared across a network and linked by cryptography, so they are hard to alter.

Correct Answer: Blockchain technology

Cryptocurrency uses blockchain technology: digital currencies such as Bitcoin record transfers on a decentralized blockchain ledger.

Correct Answer: Location & navigation information

GPS provides location and navigation information: satellite signals let a receiver work out where it is and how to reach a destination.

Correct Answer: Google Drive, OneDrive, Dropbox

Cloud storage examples include Google Drive, OneDrive and Dropbox: services that store files on remote servers accessed over the internet.

Correct Answer: Wired networking

Ethernet is used for wired networking: the standard for connecting computers in a local network by cable.

Correct Answer: 32-bit addresses

IP version 4 uses 32-bit addresses: four 8-bit numbers, written like 192.168.1.1.

Correct Answer: 128-bit addresses

IP version 6 uses 128-bit addresses: a much larger address space than IPv4's 32 bits.

Correct Answer: Chrome, Firefox, Edge

Browser examples include Chrome, Firefox and Edge: programs used to access and display websites.

Correct Answer: Digital information readable by scanner

A QR code stores digital information readable by scanner: a two-dimensional barcode that a phone camera can read as a link, text or payment data.

Correct Answer: Digital info on real-world view

Augmented Reality overlays digital info on a real-world view: computer images are laid over what the camera or headset sees.

Correct Answer: Fully immersive digital environment

Virtual Reality creates a fully immersive digital environment: a computer-generated world the user experiences, usually through a headset.