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Which generation of mobile technology first introduced packet-switched data transmission?
- 1G
- 2G
- 3G
- 4G
Answer: 2G
2G (specifically GPRS/EDGE enhancements) introduced packet-switched data transmission, enabling always-on internet access and efficient data usage. 1G was analog voice only; 3G improved data speeds; 4G introduced all-IP architecture with higher bandwidth.
What does 'HTTPS' in a website URL indicate?
- High-speed Transfer Protocol
- Hyper Text Transfer Protocol Secure
- Hosted Transfer Protocol System
- Hardware Tested Protocol Standard
Answer: Hyper Text Transfer Protocol Secure
HTTPS indicates that communication between browser and website is encrypted using SSL/TLS protocols. This protects data from eavesdropping and tampering. Users should look for the padlock icon and 'https://' when entering sensitive information online.
Which technology uses quantum mechanical phenomena like superposition and entanglement for computation?
- Cloud Computing
- Quantum Computing
- Edge Computing
- Fog Computing
Answer: Quantum Computing
Quantum Computing uses qubits that can exist in superposition (0 and 1 simultaneously) and entanglement (correlated states) to solve certain problems exponentially faster than classical computers, with applications in cryptography, drug discovery, and optimization.
Which of the following is an input device?
- Monitor
- Printer
- Scanner
- Speaker
Answer: Scanner
Scanner is an input device that captures images, text, or objects and converts them into digital format. Monitor, printer, and speaker are output devices that display or present processed information to the user.
Which ISRO mission was India's first interplanetary mission to Mars?
- Chandrayaan-1
- Mangalyaan
- Aditya-L1
- GSAT-6A
Answer: Mangalyaan
Mangalyaan (Mars Orbiter Mission), launched in 2013, made India the first Asian nation and fourth space agency globally to reach Mars orbit. It was completed at a cost of just $74 million, making it one of the least expensive Mars missions.
Which SQL command is used to retrieve data from a database?
- INSERT
- UPDATE
- SELECT
- DELETE
Answer: SELECT
SELECT is the SQL command used to query and retrieve data from one or more tables. INSERT adds new records, UPDATE modifies existing records, and DELETE removes records. SELECT is the most frequently used command in database operations.
Which of the following is a symmetric encryption algorithm?
- RSA
- AES
- ECC
- Diffie-Hellman
Answer: AES
AES (Advanced Encryption Standard) is a symmetric algorithm using the same key for encryption and decryption. RSA, ECC, and Diffie-Hellman are asymmetric algorithms using public-private key pairs. AES is widely used for securing sensitive data.
Which protocol is used to convert domain names like 'google.com' into IP addresses?
- HTTP
- FTP
- DNS
- SMTP
Answer: DNS
DNS (Domain Name System) translates human-readable domain names into numerical IP addresses that computers use to identify each other on the network. Without DNS, users would need to remember IP addresses like 142.250.189.206.
Which ISRO launch vehicle is known as the 'workhorse of India' for launching satellites into polar orbits?
- GSLV Mk III
- PSLV
- ASLV
- SSLV
Answer: PSLV
PSLV (Polar Satellite Launch Vehicle) is called ISRO's workhorse due to its reliability in launching earth observation and remote sensing satellites into polar sun-synchronous orbits. It has successfully launched Chandrayaan-1 and Mangalyaan.
Which component is known as the temporary memory of a computer that loses data when power is turned off?
- ROM
- Hard Disk
- RAM
- Cache
Answer: RAM
RAM (Random Access Memory) is volatile memory used for temporary storage of data and machine code currently being used. It loses all data when power is switched off, unlike ROM or hard disk which are non-volatile.