1. : Which frequency band is used for Bluetooth communication?
(A) 2.4 GHz
(B) 5 GHz
(C) 900 MHz
(D) 1.8 GHz
2. : What does WiFi stand for?
(A) Wireless Fidelity
(B) Wide Field
(C) Wired Fiber
(D) Wireless Function
3. : Which modulation is commonly used in FM radio broadcasting?
(A) Amplitude Modulation
(B) Frequency Modulation
(C) Phase Modulation
(D) Pulse Modulation
4. : What is the typical range of a Bluetooth device?
(A) 1–10 meters
(B) 10–100 meters
(C) 100–500 meters
(D) More than 1 km
5. : Which wireless communication standard is defined by IEEE 802.11?
(A) WiFi
(B) Bluetooth
(C) Zigbee
(D) RFID
6. : What type of wave is used in TV broadcasting?
(A) Sound waves
(B) Light waves
(C) Radio waves
(D) Gamma rays
7. : Which of the following is not a characteristic of Bluetooth?
(A) Low power consumption
(B) Long range
(C) Short-distance communication
(D) Uses 2.4 GHz ISM band
8. : What does the term “Hotspot” refer to in wireless communication?
(A) Microwave transmission
(B) TV channel
(C) Area with WiFi coverage
(D) Satellite signal
9. : Which one of these technologies supports mesh networking?
(A) WiFi
(B) Bluetooth
(C) Zigbee
(D) Satellite
10. : Which layer of the OSI model does Bluetooth operate on?
(A) Application layer
(B) Network layer
(C) Data Link layer
(D) Physical and Data Link layers
11. : What is the maximum theoretical speed of WiFi 6 (802.11ax)?
(A) 300 Mbps
(B) 1.3 Gbps
(C) 9.6 Gbps
(D) 5 Gbps
12. : What is the full form of RFID?
(A) Radio Frequency Identification
(B) Radio Free Identification
(C) Real Frequency ID
(D) Radio Field Input Device
13. : Which of the following devices typically uses Bluetooth?
(A) Microwave oven
(B) Wireless speaker
(C) Smart TV tuner
(D) Landline phone
14. : What type of antenna is typically used in radio broadcasting?
(A) Parabolic
(B) Dipole
(C) Loop
(D) Helix
15. : What does NFC stand for in wireless communication?
(A) Network Frequency Control
(B) Near Field Communication
(C) Non-Fixed Channel
(D) Near Frequency Coding
16. : What frequency band is used in FM broadcasting?
(A) 30–300 MHz
(B) 300–3000 MHz
(C) 3–30 MHz
(D) 3000–30000 MHz
17. : Which of the following is NOT a component of a television system?
(A) Camera
(B) Transmitter
(C) Decoder
(D) Microcontroller
18. : The first public demonstration of TV was made by:
(A) John Logie Baird
(B) Thomas Edison
(C) Nikola Tesla
(D) Alexander Graham Bell
19. : WiFi Direct allows devices to:
(A) Connect through a router only
(B) Connect via cables
(C) Connect directly without a router
(D) Use infrared communication
20. : Which wireless standard is used for long-range rural internet access?
(A) Bluetooth
(B) WiMAX
(C) NFC
(D) IRDA
21. : In radio communication, what is the function of a modulator?
(A) Amplifies the signal
(B) Combines signal with carrier wave
(C) Filters noise
(D) Powers the antenna
22. : Bluetooth is categorized under which type of network?
(A) WAN
(B) MAN
(C) PAN
(D) LAN
23. : What is the typical frequency range of UHF used in television broadcasting?
(A) 30–300 MHz
(B) 300–3000 MHz
(C) 3–30 MHz
(D) 3–300 GHz
24. : What is the function of a router in a wireless network?
(A) Modulates signal
(B) Amplifies radio waves
(C) Connects different networks
(D) Transmits TV channels
25. : Which device is used to convert radio signals into audio?
(A) Modem
(B) Amplifier
(C) Radio receiver
(D) Tuner
26. : Infrared communication is typically used in:
(A) Mobile data
(B) Remote controls
(C) FM radio
(D) WiFi routers
27. : Bluetooth uses which type of multiplexing technique?
(A) TDM
(B) FDM
(C) FHSS
(D) CDMA
28. : Which IEEE standard is used for Bluetooth technology?
(A) 802.11
(B) 802.3
(C) 802.15.1
(D) 802.16
29. : What is the purpose of encryption in wireless communication?
(A) Increase speed
(B) Increase range
(C) Protect data
(D) Add interference
30. : The WiFi signal can be interrupted by:
(A) Wall thickness
(B) Microwave ovens
(C) Other WiFi networks
(D) All of the above
31. : Which technology allows streaming audio from a smartphone to a car stereo?
(A) IR
(B) Bluetooth
(C) WiFi
(D) NFC
32. : What does the term “bandwidth” refer to in wireless communication?
(A) Amount of energy used
(B) Frequency of transmission
(C) Range of frequencies
(D) Number of devices connected
33. : Which of the following is not a wireless communication medium?
(A) Radio waves
(B) Fiber optics
(C) Infrared
(D) Microwaves
34. : Which modulation technique is used in digital TV broadcasting?
(A) AM
(B) FM
(C) QAM
(D) PWM
35. : The main difference between WiFi 4 and WiFi 6 is:
(A) Number of channels
(B) Speed and efficiency
(C) Modulation technique
(D) Power source
36. : Which frequency band is not license-free for public use?
(A) 2.4 GHz
(B) 5 GHz
(C) 700 MHz
(D) 915 MHz
37. : What does the term “SSID” refer to in WiFi networks?
(A) Subnet ID
(B) Static Service ID
(C) Service Set Identifier
(D) Signal Service Identifier
38. : Zigbee is mainly used for:
(A) Video streaming
(B) Remote controls
(C) Home automation
(D) High-speed internet
39. : The “pairing” process in Bluetooth involves:
(A) Connecting multiple WiFi routers
(B) Establishing a secure connection between devices
(C) Sending IR signals
(D) Broadcasting FM channels
40. : What is the use of the MAC address in wireless networking?
(A) Provides IP address
(B) Identifies the network
(C) Uniquely identifies devices
(D) Filters the frequency
41. : The range of WiFi indoors is typically:
(A) 5–10 meters
(B) 10–50 meters
(C) 50–100 meters
(D) Over 200 meters
42. : A repeater in a wireless network is used to:
(A) Decrease signal strength
(B) Encrypt traffic
(C) Extend coverage area
(D) Convert signal formats
43. : What type of waves are used in satellite TV transmission?
(A) Infrared
(B) Microwaves
(C) Sound waves
(D) UV rays
44. : Which of the following is used to detect Bluetooth-enabled devices nearby?
(A) SSID scanner
(B) Beacon
(C) Device Discovery
(D) Frequency analyzer
45. : WiFi works on which layers of the OSI model?
(A) Network and Data Link
(B) Physical and Data Link
(C) Transport and Application
(D) Data Link and Session
46. : What is the term for unauthorized access to a wireless network?
(A) Phishing
(B) Sniffing
(C) Wardriving
(D) Spoofing
47. : What does a smart TV use to access the internet wirelessly?
(A) Bluetooth
(B) NFC
(C) WiFi
(D) Zigbee
48. : Which wireless tech is primarily used for wearable health trackers?
(A) WiMAX
(B) Zigbee
(C) Bluetooth Low Energy
(D) NFC
49. : Bluetooth operates using which protocol?
(A) TCP/IP
(B) OBEX
(C) UDP
(D) HTTP
50. : Which generation of mobile networks first supported video calling?
(A) 2G
(B) 3G
(C) 4G
(D) 5G