Science and Technology Fundamentals

Java version 1.5, also known as Java 5.0, was codenamed 'Tiger'. It introduced significant language features like generics, annotations, and the enhanced for-loop. Version 1.4 was 'Merlin', 1.6 was 'Mustang', and Java 2 was a branding name for versions 1.2 through 1.4.

MAC (Media Access Control) addresses can be cloned or spoofed in software. By changing the MAC address on other laptops to match the ISP-registered MAC address, they can authenticate on the network. This is technically feasible though it violates ISP terms of service. A proxy server would work but requires the registered laptop to be always on. A hub doesn't solve authentication.

The very first Apple logo, designed by Ronald Wayne in 1976, depicted Sir Isaac Newton sitting under an apple tree with a poem border. It was replaced shortly after by the famous rainbow bitten apple designed by Rob Janoff.

XML stands for eXtensible Markup Language, a text-based markup language designed to store and transport data in a structured format. The 'extensible' means users can define their own custom tags, unlike HTML which has predefined tags. XML is widely used for data interchange between systems and platforms.

Microsoft Windows XP had minimum system requirements of 64MB RAM, though 128MB was recommended for acceptable performance. The question asks for minimum requirements, not recommended, making 64MB the correct answer. Windows XP could technically run on 64MB, but performance would be very slow. Many users upgraded to 256MB or more for better performance.

Disk Management is the Windows utility that allows users to view and modify disk partition information. It shows all drives, their partitions, sizes, and status. Chkdsk checks for filesystem errors. Device Manager manages hardware devices. Scandisk is an older disk checking utility. Only Disk Management provides the full partition viewing interface.

Blu-ray discs have the highest storage capacity among these options. A standard Blu-ray can store 25GB (single-layer) or 50GB (dual-layer). DVDs store 4.7GB (single-layer) or 8.5GB (dual-layer). CDs store about 700MB. Floppy diskettes store only 1.44MB. Blu-ray's capacity significantly exceeds the other formats.

192.168.1.100 is a local network IP address using the private IP range 192.168.0.0/16 defined in RFC 1918. Private IP addresses (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16) are used for local networks and are not routable on the internet. The other options (74.125.127.100, 69.72.169.241, 209.131.36.100) are public IP addresses assigned to internet-facing services.

JPEG, GIF, and BMP are all image file formats. TMP is a generic temporary file extension used by many programs and is not an image file format.

There are 20 standard amino acids that make up proteins in living cells. These are the building blocks of proteins and are encoded by the genetic code. Essential amino acids must be obtained from diet.

DNA stands for Deoxyribonucleic Acid, which is the molecule that carries genetic instructions for life. Option A 'Deoxyribo acid' is incomplete and incorrect. Option C 'Deoxyiamino acid' and Option D 'Deoxyichromonucleic acid' are fictional terms with no scientific meaning.

The four nucleotides that make up DNA are Adenine (A), Cytosine (C), Guanine (G), and Thymine (T). In RNA, Thymine is replaced by Uracil (U), but the question specifically asks about DNA.

There's a factual issue here. INS Chakra was India's first nuclear submarine, but it was a leased Russian submarine (Akula-class), not indigenous. INS Arihant is India's first indigenous nuclear submarine. However, the question asks for 'first nuclear submarine' without specifying indigenous, so INS Chakra is technically correct. INS Viraat was an aircraft carrier, INS Delhi is a destroyer.

Dr. Rangabashyam, a noted Indian medical professional, was awarded inclusion in the Wall of Honour at the Royal Society of Medicine. C.N. Rao is a famous scientist but not specifically associated with this medical honor. Kadambini Ganguli and Anandabai Joshi were early Indian female doctors but not recent recipients of this specific honor.

Lakshya is India's pilotless target aircraft used for military training. Nishant is a UAV but not primarily pilotless, Prithvi is a ballistic missile, and Agni is a series of nuclear-capable missiles - none of which are pilotless aircraft.

K. Santhanam, a scientist associated with the Pokhran II tests, publicly called the thermonuclear test a 'fizzle'. Abdul Kalam was the project head who defended the tests, while the others listed were not directly involved in the controversy.