Computer Science

Hard real-time systems require strict adherence to deadlines because missing them can lead to catastrophic consequences. Airbag deployment in cars is a classic example, as failure to deploy on time can result in serious injury or death. Other options like video streaming or social media updates are soft real-time or non-real-time systems where deadlines are less critical.

The operating system is a type of system software because it manages hardware resources and provides common services for application software, making it the most common example of system software.

Non-volatile storage retains data even after the power is turned off, unlike volatile storage which loses data when power is lost. Temporary RAM is a type of volatile memory.

DVD stands for Digital Versatile Disk, which refers to the optical disc storage format used for video, data storage, and other digital content. This is the widely accepted and correct expansion of the acronym DVD.

Modern systems use Flash Memory to store the BIOS because it is rewritable and non-volatile, allowing updates to the BIOS firmware. ROM is read-only and typically not used in modern BIOS storage. Cache and Virtual Memory are unrelated to BIOS storage.

Compact disks (CDs) store data using laser technology, where a laser beam reads the data encoded as tiny pits on the disk's surface. Magnetic strips, microchips, and photocells are not used for data storage in CDs.

Non-volatile memory retains stored information even when power is removed, unlike volatile memory which loses data when power is off. Therefore, the correct answer is Non-Volatile memory.

A CD-RW (Compact Disc ReWritable) can be written, erased, and rewritten multiple times, unlike CD-ROM (read-only) or CD-R (write once). Options C and D are not standard disc types.

The standard capacity of a commonly used floppy disk is 1.44 MB, which is the correct and widely recognized size for a 3.5-inch floppy disk.

A standard compact disc (CD) typically has a storage capacity of about 700 MB, which is why option C is correct. The other options are lower than the standard capacity.

ROM (Read-Only Memory) contains the firmware or BIOS that initializes hardware and starts the computer during the boot process, unlike RAM which is volatile and WAN which is a network term.

A Hard Disk is a storage device used to store data permanently, unlike a printer which is an output device, Cache RAM which is a small fast memory for temporary data, and RAM which is volatile memory that loses data when power is off.

In computer science, the process of retrieving existing data from memory is commonly referred to as 'Read' or 'Read Out'. 'Read Out' is a valid term used to describe the action of reading data from memory or storage. The other options are either incomplete or nonsensical in this context. Therefore, option A, 'Read Out', is the correct answer.

DVD+RW discs are rewritable DVDs that allow data to be erased and rewritten multiple times, unlike DVD+R which are write-once discs. Therefore, the correct answer is DVD+RW.

Cache memory is a small, fast memory located close to the CPU that stores frequently accessed data to speed up processing. It is faster and smaller than other memory types outside the CPU, making option C correct.

Cache memory is designed to store temporary data to speed up access to frequently used information. It does not store system files, cookies, browser history, or permanent data.

PROM (Programmable Read-Only Memory) chips are programmed using devices called ROM burners, which write data onto the chip before it is permanently set. Other options like 'Chip Kits' or 'PROM Reader' do not accurately describe the programming device.

A Blu-ray Disc stores significantly more data than a DVD, typically up to 25 GB per layer compared to a DVD's 4.7 GB. Floppy disks, Green-ray Discs (which is not a standard term), and Compact Discs store much less data than DVDs.

A computer device can read from and write to all the listed storage types: hard disk, RAM, and flash drive. Therefore, 'All of these' is the correct answer.

ROM (Read-Only Memory) stores data permanently in a computer, retaining information even when the power is off. RAM is temporary memory, CPU processes data but does not store it permanently, and 'None of these' is incorrect.

A buffer acts as a holding area that temporarily stores data, allowing the CPU to manipulate or process it before transferring it to a device. ROM is read-only memory, a compiler is a program, and a tabulator is an old device for data processing, so these options are incorrect.

Programs stored in ROM are called firmware because firmware is a type of software permanently programmed into read-only memory (ROM) to control hardware devices.

Magnetic tape is generally the cheapest memory device among the options listed due to its low cost per unit of storage, especially for archival and backup purposes. Compact disks and flash memory tend to be more expensive per unit of storage, and magnetic disks are typically more costly than magnetic tape.

A disk (such as a hard disk or optical disk) is a circular device used for data storage, unlike the motherboard, RAM, or ROM which serve different functions in a computer system.

A standard single-layer double-sided DVD can store up to 7.7 GB because each side holds about 3.85 GB, and with two sides, the total capacity doubles to approximately 7.7 GB. The other options do not match this standard capacity.