The correct answer is 'D. Super Computer' because supercomputers are specifically designed to perform complex calculations and process large amounts of data at incredibly high speeds. They are much larger and more powerful than traditional computers, making them the largest type of computer in terms of processing capabilities.
The correct answer is 'F9' because pressing this key in Microsoft Excel triggers the calculation of the entire current sheet. This shortcut allows users to quickly update all formulas and recalculate the values based on the latest data input.
The correct answer is 'Locality of reference' because cache memory is designed to exploit the tendency of programs to access the same memory locations repeatedly. This principle allows cache memory to store frequently accessed data closer to the processor, reducing the time it takes to retrieve that data. By utilizing the locality of reference, cache memory can improve overall system performance by reducing the latency of memory access.
The correct answer is 'C. Text group' because the header and footer button in PowerPoint is related to adding text elements to the slides. The Text group on the Insert tab contains various options for adding text boxes, WordArt, and other text-related features, making it the logical location for the header and footer button.
The correct answer is 'Cookies' because cookies are small pieces of data stored on a user's device that help websites recognize and remember the user when they return. Cookies are commonly used for tracking user preferences, login information, and other personalized settings. Therefore, cookies are the most appropriate choice for identifying a returning user on a website.
The correct answer is 'D. All of Above' because digital signals can be represented by binary numbers, square waves, and pulses. Binary numbers are used to represent data in computers, square waves are used to transmit digital signals in communication systems, and pulses are used in digital logic circuits to represent high and low voltage levels. Therefore, all of the options provided are valid ways to represent digital signals.
The correct answer is 'D. Extensible Markup Language' because XML is a language used for storing and transporting data in a structured format. The term 'Extensible' in XML refers to its ability to be easily extended and customized to fit different needs and requirements, making it a versatile choice for data representation.
The correct answer is 'D. Word processors' because word processors are specifically designed software programs used for creating and editing text-based documents. They provide features such as formatting options, spell check, and the ability to insert images and tables, making them the most suitable choice for this purpose. Other software options may not have the same capabilities or focus on text-based document creation like word processors do.
The correct answer is 'False positive' because heuristic checking refers to a method of testing that involves using educated guesses or rules of thumb to identify potential issues or errors in a system. A false positive occurs when the system incorrectly identifies something as an issue when it is actually not a problem. In the context of heuristic checking, a false positive would mean that the system mistakenly flags something as an error when it is not.
The correct answer is 'Main memory' because main memory, also known as RAM (Random Access Memory), is where data and programs are stored temporarily while the processor is actively using them. Main memory is directly accessible by the processor, allowing for quick retrieval and manipulation of data and programs during processing tasks. This makes main memory the primary storage location for the processor to access and work with data and programs in real-time.