After the massive Satyam accounting scandal in 2009, Tech Mahindra acquired Satyam Computer Services through a government-supervised auction process. The company was later renamed Mahindra Satyam and eventually merged with Tech Mahindra. IBM, Oracle, and Wipro were not involved in the acquisition.

Spyware is software that secretly monitors and collects information about a user's activities without their knowledge. Worms are self-replicating malware, Adware displays advertisements (with consent), and Viruses attach themselves to legitimate programs. The key characteristic of spyware is covert surveillance.

Video Audio Integration Operation (VAIO) is a brand of consumer electronics products developed by Sony. The name VAIO represents the integration of analog and digital technology, with the 'VA' representing analog wave and the 'IO' representing digital binary code. Sony's VAIO line included laptops, desktops, and other multimedia devices.

Cray Jaguar was the world's fastest supercomputer at the time of this question's writing. Located at Oak Ridge National Laboratory, it was a Cray XT5 system that achieved sustained performance of over 1 petaflop (1 quadrillion calculations per second), making it the first system to break the petaflop barrier.

LINQ (Language Integrated Query) was officially introduced with .NET Framework 3.5, released in 2007. This framework addition provided a unified query syntax for working with data from various sources including collections, SQL databases, XML, and entities directly within C# and Visual Basic.

A star schema consists of a single central fact table containing quantitative and foreign key data, surrounded by multiple dimension tables that provide descriptive context. The name 'star' comes from the visual resemblance to a star when the schema is diagrammed, with the fact table at the center and dimension tables radiating outward like points.

Slowly Changing Dimension Type 2 maintains complete historical data by adding a new row for each change rather than updating existing records. Each version includes effective date and expiry date columns (or current record flag) to track when the attribute value was valid, enabling full historical analysis and trend identification.

Type 6 dimensions combine Type 2 (full history with effective dates) and Type 3 (previous value tracking in separate columns) approaches. They maintain both historical records across multiple rows AND track immediate previous values within the same record, often using separate columns for 'current' and 'previous' attribute values along with validity periods.

Data warehouses are designed for long-term trend analysis and business intelligence reporting, which inherently requires storing historical data spanning many months or years.

Data warehouse schemas are typically denormalized intentionally to optimize query performance for analytical workloads. Unlike operational databases that use normalization (3NF) to reduce redundancy and ensure transactional integrity, data warehouses use denormalized structures like star schemas to minimize joins and speed up complex aggregation queries.

The statement is FALSE. Bridge tables are used to resolve many-to-many relationships between fact tables and dimensions, not to handle different grain levels. When grain levels differ between fact and dimension tables, you would typically create aggregate fact tables at the appropriate grain level or use conformed dimensions designed for multiple grains - not bridge tables.

The XML declaration must start with . It uses question marks on both sides, not a slash like other XML tags. Options B, C, and D are incorrect because they either use the wrong closing syntax or don't start with the proper XML declaration marker.

A well-formed XML document must have exactly one root element containing all other elements. This document has four sibling root elements (to, from, heading, body) without a wrapper element, so it is not well-formed.

XML elements can be empty. They can be written as or using the self-closing syntax . Empty elements are commonly used in XML for elements that don't need content.

CDATA sections in XML use the syntax to tell the parser to treat the content as literal text, not markup. This is used for containing special characters or code snippets that would otherwise be interpreted as XML.

HTML headings are numbered from 1 to 6, where

is the largest and most important heading, and

is the smallest. The tag contains metadata, not visible content, and there is no tag in HTML.

The correct way to add background color in modern HTML is using CSS with the style attribute: . The tag doesn't exist, and the background attribute is deprecated. Double quotes are standard in HTML attributes.