Communication Technology Practice Questions
20 free Communication Technology practice questions for the Static GK. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.
Which Italian inventor is widely credited with the invention of the first practical radio-telegraphy system in 1895?
- A Nikola Tesla
- B Guglielmo Marconi
- C Alexander Graham Bell
- D Heinrich Hertz
Correct answer: Guglielmo Marconi
Guglielmo Marconi developed the first effective system of radio communication and sent the first transatlantic radio signal in 1901. He shared the Nobel Prize in Physics in 1909 for his contributions to wireless telegraphy.
What does the telecommunications acronym 'VOIP' stand for?
- A Voice Over Internet Protocol
- B Video On Integrated Platforms
- C Virtual Office Information Processing
- D Volume Optimized Input Path
Correct answer: Voice Over Internet Protocol
VOIP allows users to make voice calls using a broadband Internet connection instead of a regular analog phone line. It converts voice signals into digital IP packets for transmission over the internet.
Which type of electromagnetic waves are primarily used for Wi-Fi and Bluetooth communications?
- A Infrared waves
- B Ultraviolet waves
- C Radio waves
- D Microwave signals
Correct answer: Microwave signals
Wi-Fi and Bluetooth operate primarily in the 2.4 GHz and 5 GHz frequency bands, which fall under the microwave portion of the electromagnetic spectrum. These frequencies allow for high-speed data transfer over short distances.
In the context of fiber optic communication, what physical phenomenon allows light to travel through the glass core without escaping?
- A Refraction of light rays
- B Total Internal Reflection
- C Diffraction of light waves
- D The photoelectric effect
Correct answer: Total Internal Reflection
Total Internal Reflection occurs when light hits the boundary between the core and the cladding at an angle greater than the critical angle. This causes the light to reflect back into the core, enabling long-distance data transmission with minimal loss.
Who was the first person to transmit a clear human voice over a wire, leading to the invention of the telephone in 1876?
- A Thomas Alva Edison
- B Samuel Finley Breese Morse
- C Alexander Graham Bell
- D Antonio Santi Giuseppe Meucci
Correct answer: Alexander Graham Bell
Alexander Graham Bell was granted the first U.S. patent for the telephone. His first successful transmission was the famous phrase, 'Mr. Watson, come here, I want to see you.'
Which mobile network generation first introduced high-speed data transmission, enabling mobile internet browsing and video calls?
- A 1G
- B 2G
- C 3G
- D 4G
Correct answer: 3G
3G (Third Generation) technology was a significant leap from 2G as it supported faster data rates and introduced the era of smartphones. It utilized packet switching rather than just circuit switching for data.
What is the primary function of a 'Gateway' in a computer network?
- A To amplify and boost weak electrical signals
- B To connect two networks using different protocols
- C To store web pages locally for faster access next time
- D To protect connected devices against power surges
Correct answer: To connect two networks using different protocols
A gateway acts as a 'node' that connects two disparate networks that use different transmission protocols. It essentially serves as an entry and exit point for the network.
Which satellite system, managed by the United States, provides autonomous geo-spatial positioning with global coverage?
- A Global Navigation Satellite System (GLONASS)
- B Galileo Positioning System
- C BeiDou Navigation Satellite System
- D Navstar Global Positioning System (GPS)
Correct answer: Navstar Global Positioning System (GPS)
The Global Positioning System (GPS) is a satellite-based radionavigation system owned by the United States government. It provides geolocation and time information to a GPS receiver anywhere on or near the Earth.
Which technology is used in 'Near Field Communication' (NFC) for contactless payments and data exchange?
- A Laser light pulse transmission technology
- B Ultrasonic sound wave transmission
- C Fiber optic cable transmission
- D Radio-frequency identification (RFID)
Correct answer: Radio-frequency identification (RFID)
NFC is a set of communication protocols that enables two electronic devices to establish communication by bringing them within 4 cm of each other. It is based on RFID technology and used for mobile payments like Apple Pay or Google Pay.
What was the name of the first electronic general-purpose computer, which paved the way for modern computing and communication?
- A UNIVAC
- B EDVAC
- C Z3
- D ENIAC
Correct answer: ENIAC
ENIAC (Electronic Numerical Integrator and Computer) was completed in 1945. It was Turing-complete and capable of being reprogrammed to solve a full range of computing problems.
In email communication, what does 'BCC' stand for?
- A Blind Carbon Copy
- B Back Channel Control
- C Business Communication Code
- D Basic Client Copy
Correct answer: Blind Carbon Copy
BCC allows the sender to send a copy of an email to multiple recipients without any of them seeing the other addresses listed in the BCC field. It is primarily used for privacy and to prevent 'Reply All' chains.
Which inventor developed the dot-and-dash code used for telegraph transmission in the 1830s?
- A Samuel Morse
- B Benjamin Franklin
- C Isaac Newton
- D Michael Faraday
Correct answer: Samuel Morse
Samuel Morse, along with Alfred Vail, developed a code that assigned dots and dashes to letters of the alphabet and numbers. This revolutionized long-distance communication via electrical pulses over wires.
What is the maximum frequency range of the 'Ultra High Frequency' (UHF) band commonly used for TV broadcasting and GPS?
- A 3 MHz to 30 MHz
- B 30 MHz to 300 MHz
- C 300 MHz to 3 GHz
- D 3 GHz to 30 GHz
Correct answer: 300 MHz to 3 GHz
The UHF band ranges from 300 megahertz (MHz) to 3 gigahertz (GHz). It is ideal for television broadcasting, cell phones, and satellite communication because the waves are small enough to be received by portable antennas.
Which of the following is the protocol used for transferring files over the internet?
- A HTTP
- B SSH
- C FTP
- D SNMP
Correct answer: FTP
FTP (File Transfer Protocol) is a standard network protocol used for the transfer of computer files between a client and server on a computer network. It was one of the earliest protocols developed for the internet.
The 'Li-Fi' technology transmits data using which medium instead of radio waves?
- A Light waves
- B Sound waves
- C Magnetic fields
- D Electric currents
Correct answer: Light waves
Li-Fi (Light Fidelity) uses Light Emitting Diodes (LEDs) to transmit data at high speeds. By flickering the light at nanosecond intervals, data can be transmitted faster than traditional Wi-Fi in certain environments.
Which device is used to modulate digital signals into analog signals for transmission over phone lines and demodulate them back?
- A Router
- B Switch
- C Hub
- D Modem
Correct answer: Modem
The word 'Modem' is a contraction of MOdulator-DEModulator. It bridges the gap between the digital world of computers and the analog world of traditional telephone or cable systems.
In mobile communications, 'SIM' card stands for:
- A Subscriber Identity Module
- B System Identification Module
- C Standard Integrated Memory
- D Secure Information Medium
Correct answer: Subscriber Identity Module
A Subscriber Identity Module (SIM) card is an integrated circuit that securely stores the international mobile subscriber identity (IMSI) number and its related key. It is used to identify and authenticate subscribers on mobile telephony devices.
Which undersea cable system was the first to connect the United States and Europe for telegraphy in 1858?
- A Transatlantic Telegraph Cable
- B Pacific Light Cable Network
- C Fiber-Link Around the Globe
- D SeaMeWe-3 Undersea Cable System
Correct answer: Transatlantic Telegraph Cable
The Transatlantic Telegraph Cable was a landmark achievement in engineering that reduced communication time between North America and Europe from ten days (by ship) to a few minutes. Although the first cable failed quickly, it proved the concept was possible.
What is the primary advantage of '5G' technology over '4G'?
- A Lower latency and higher bandwidth
- B Lower frequency use
- C Use of analog signals
- D Better backward compatibility with 2G
Correct answer: Lower latency and higher bandwidth
5G offers significantly faster data speeds and much lower latency (delay) than 4G. This enables new technologies like autonomous vehicles, remote surgery, and massive IoT (Internet of Things) deployments.
Which programming language, often called the 'language of the web', is essential for creating interactive content in browsers?
- A Python
- B TypeScript
- C SQL
- D JavaScript
Correct answer: JavaScript
JavaScript is a high-level, interpreted scripting language that is one of the core technologies of the World Wide Web. Alongside HTML and CSS, it allows for the creation of dynamic and interactive user interfaces.