Pco Quiz 1 Sir Edward Pasadilla

A computer is a programmable machine that can receive input, store and manipulate data, and provide output in a useful format. It is a device that can perform various tasks and calculations based on instructions given to it. Computers are widely used in different fields such as education, business, entertainment, and research. They can process large amounts of data quickly and accurately, making them essential tools in today's digital age.

The missing word in the given question is "access" or "ACCESS". In computer science, "random access memory" (RAM) refers to a type of computer memory that allows data to be read from or written to in any order, regardless of the physical location of the data. The word "access" or "ACCESS" accurately completes the phrase and conveys the idea of being able to retrieve or store data in a non-sequential manner.

The word "ONLY" is the missing word in the given question. This is indicated by the capitalization and lowercase formatting of the word in the answer options. The phrase "READ ONLY MEMORY" is a common term in computer science, referring to a type of computer memory that can only be read and not modified.

Floppy disks were commonly used in the past as a storage medium for saving data. They were small, portable, and had a decent amount of storage capacity for that time. However, with the advancement of technology, floppy disks have become obsolete and are no longer widely used. Most modern devices do not have floppy disk drives, and more efficient and reliable storage options like USB flash drives and cloud storage have replaced floppy disks. Therefore, while it is technically possible to use a floppy disk to save data, it is not practical or commonly done in today's digital age.

The acronym C.U. stands for Control Unit. The control unit is a component of a computer's central processing unit (CPU) that directs and coordinates the operations of the other units within the CPU. It is responsible for fetching, decoding, and executing instructions, as well as managing the flow of data between the CPU and other devices. The control unit plays a crucial role in controlling and coordinating the overall operation of the computer system.

A microprocessor is a central processing unit (CPU) that performs the processing tasks of a computer system. It is responsible for executing instructions, performing calculations, and managing data flow within the system. Therefore, it belongs to the processing devices category of the computer system.

A keyboard is an input device used to enter data into a computer or other electronic device. It does not have the capability to store data. The data entered through a keyboard is typically processed and stored in the computer's memory or storage devices. Therefore, the correct answer is NO, we cannot store data on a keyboard.

The correct answer is Arithmetic Logic Unit. The acronym A.L.U. stands for Arithmetic Logic Unit, which is a component of a computer's central processing unit (CPU). The ALU performs arithmetic and logical operations on the data stored in the computer's memory. It is responsible for carrying out tasks such as addition, subtraction, comparison, and logical operations like AND, OR, and NOT. The ALU plays a crucial role in executing the instructions of a computer program.

The correct answer is "FLASH DRIVES." Flash drives are portable storage devices that use flash memory to store and transfer data. They are small in size and connect to a computer via a USB port. Unlike diskettes and CDs, flash drives do not require any special drives or readers to access the data. They are commonly used for transferring files between computers, storing backups, and carrying data on the go.

The correct answer is HARD DISK because it is the only device mentioned in the list that is primarily used for storing data. A hard disk is a non-volatile storage device that stores and retrieves digital information using magnetic storage. The other devices listed, such as processor, RAM, memory card, and ROM, are not used for data storage but rather for processing, temporary storage, and program execution.

The correct answer is SOFTWARE because it is the part of the computer system that is intangible. Unlike hardware, which refers to the physical components of a computer system, software refers to the programs, applications, and data that are stored on the hardware and enable the computer system to perform various tasks. MS Word, being a word processing software, is an example of intangible software that allows users to create, edit, and format documents.

ROM stands for Read-Only Memory, which is a type of non-volatile memory. Non-volatile means that the data stored in ROM is retained even when the power is turned off. Unlike RAM (Random Access Memory), ROM cannot be modified or written to by normal computer operations. It contains permanent instructions that are programmed during manufacturing and cannot be changed or erased by normal computer operations. Therefore, ROM is commonly referred to as the "Non-Volatile" Memory.

Hardware refers to the physical components of a computer system that can be touched or held. This includes devices such as the central processing unit (CPU), motherboard, memory, hard drive, and peripherals like the keyboard, mouse, and monitor. These tangible components are essential for the computer system to function properly and carry out tasks. Software, on the other hand, refers to the programs and instructions that run on the hardware. Storage, output, and input are all related to different aspects of the computer system but do not specifically refer to tangible components.

A microphone is classified as an input device because it is used to input sound or audio into the computer system. Input devices are used to provide data or instructions to the computer system, and in the case of a microphone, it allows users to input audio or sound into the computer for recording, communication, or other purposes.

A flash drive is a type of storage device that is used to store and transfer data in a computer system. It is a portable device that can be connected to a computer's USB port and is capable of storing large amounts of data. Therefore, a flash drive belongs to the storage part of the computer system.

The monitor is an output device that displays information from the computer. It is not designed to input data. Input devices such as keyboards, mice, and touch screens are used to enter data into the computer. Therefore, the correct answer is "NO."

A computer scanner is a device that is used to convert physical documents or images into digital format. It is typically connected to a computer and allows users to scan documents, photos, or other items and save them as digital files. This device is commonly used in offices or homes for various purposes such as creating digital copies, sending documents via email, or archiving important papers. Unlike other options listed, a computer scanner specifically refers to a device designed for scanning documents and is not limited to barcode scanning or capturing images like a digital camera or webcam.

The correct answer is PROJECTOR because it is a device used to display images or videos onto a screen or surface. It is commonly used in presentations, movie theaters, and classrooms to project large images for a larger audience to view. Unlike the other options listed, a projector does not have a scanning function, measure angles, or capture images.

The correct answer is "OUTPUT" because it is the only option that fits the given definition of a peripheral that displays results from a computer. Input, processing, storage, and computer are not peripherals that display results, but rather components or functions of a computer system.

A projector is an output device because it takes the information from a computer or other device and projects it onto a screen or other surface. It does not input or store data, nor does it process data or function as part of the computer's memory. Its main purpose is to display visual information to an audience, making it an output device.

A web camera is considered an input device because it allows users to input visual information into a computer system. It captures video and images and sends them to the computer for processing and storage. This makes it different from output devices like monitors or printers, which display or produce information. Therefore, the correct answer is INPUT DEVICE.

The given options are all different types of devices, but the correct answer is "PROCESSOR". A processor, also known as a central processing unit (CPU), is the main component of a computer that carries out the instructions of a computer program by performing basic arithmetic, logical, control, and input/output (I/O) operations. It is responsible for executing instructions and performing calculations, making it a crucial device in any computer system.

The given correct answer is "INPUT". In the context of the question, an input device is a hardware device that sends information to the computer. It allows users to provide data or commands to the computer system. Examples of input devices include keyboards, mice, scanners, and microphones.

RAM, or Random Access Memory, is considered as the main memory or storage of a computer system. It is a type of computer memory that can be both read from and written to by the computer's processor. RAM is used to temporarily store data that the computer is actively using, allowing for quick and efficient access to this data. Unlike other types of memory such as ROM or hard disks, RAM is volatile, meaning that its contents are lost when the computer is powered off or restarted. Therefore, RAM is crucial for the smooth and efficient operation of a computer system.

The statement is incorrect. Process devices are not responsible for saving information on a computer system. Process devices, also known as input/output devices, are responsible for transferring data between the computer and the external world, such as keyboards, mice, printers, and monitors. Saving information on a computer system is typically done by storage devices, such as hard drives or solid-state drives.

RAM stands for Random Access Memory and is commonly known as "Volatile-Memory" because it is a type of computer memory that can be both written to and read from. It is called volatile because its data is lost when the computer is turned off or restarted. RAM is used to temporarily store data that the computer needs to access quickly, such as running programs and open files. It provides fast and temporary storage for data, allowing the computer to quickly retrieve and manipulate information. Unlike ROM, hard disk, flash drives, and floppy disks, RAM is not a permanent storage medium and its contents are constantly changing.

Processing is the portion of a computer system that carries out the instructions of a computer program and is the primary element carrying out the computer's functions. It involves performing calculations, manipulating data, and executing commands. Processing is responsible for taking input from various sources, accessing data from storage, and producing output for the user. It is an essential component of any computer system as it enables the execution of tasks and the overall functioning of the system.

The given correct answer, "STORAGE," refers to computer components and recording media that retain digital data used for computing for some interval of time. This includes devices such as hard drives, solid-state drives, and optical discs, which are used to store and retrieve data in a computer system. These storage devices allow users to save and access files, programs, and other data, ensuring that it is retained even when the computer is powered off.

The correct answer is HARD DISK because it is a type of secondary storage in a computer system. Secondary storage refers to devices that can store data permanently, even when the computer is turned off. A hard disk is a non-volatile storage device that uses magnetic storage to store and retrieve digital information. It provides large storage capacity and is commonly used to store the operating system, software applications, and user data.

A CD is a storage media that is commonly used to save data. It is a type of optical disc that can store large amounts of information, such as music, videos, documents, and software. CDs are portable and can be easily accessed on various devices, including computers, stereos, and DVD players. They are commonly used for distributing and sharing media files.