Jhs 1,2 & 3 ICT Quiz On OS

An operating system is the organized collection of software that controls the overall operation of a computer. It manages the computer's hardware and software resources, provides a user interface, and allows applications to run on the computer. The operating system is responsible for tasks such as memory management, file system management, process management, and device management. It acts as an intermediary between the user and the computer hardware, ensuring that all the different components of the computer work together smoothly.

Memory is a device where information is stored. It is a storage component of a computer system that holds data, instructions, and programs that are currently being used or will be used by the CPU. Memory allows the computer to store and retrieve data quickly, making it an essential component for the functioning of a computer system.

The correct answer is COPY. The COPY command in MS-DOS is used to transfer files from one disk to another. It allows users to copy files and directories from one location to another, including between different disks. This command is useful for backing up files, creating duplicates, or simply moving files to a different disk for organization or storage purposes.

The correct answer is "A logical error in a program." This means that a bug refers to a mistake or flaw in the logic or reasoning of a program, which results in incorrect or unexpected behavior. It is different from a syntax error, which is a mistake in the code structure or syntax. The other options, documenting programs using an efficient documentation tool and all of the above, are not accurate definitions of a bug.

Microcomputer operating systems like Apple DOS, MS DOS, and PC DOS are called disk operating systems because they are initially stored on disk. This means that when the computer starts up, the operating system is loaded from the disk into the computer's memory. Once loaded, the operating system can then manage the computer's hardware and software, allowing the user to interact with the system and run various programs. Storing the operating system on disk allows for easy installation and updates, as well as efficient use of memory resources.

The correct answer is "executes first the job that first entered the queue". The FIFO algorithm stands for "First In, First Out", which means that the job that entered the queue first will be executed first. This algorithm follows a simple rule of processing jobs in the order they arrive, without considering any other factors such as priority or processor needs.

An algorithm is best described as a step-by-step procedure for solving a problem. It is a set of instructions or rules that guide the computer in performing a specific task. Algorithms can be written in various programming languages, but they are not limited to a specific computer language. Additionally, while algorithms involve mathematical concepts and principles, they are not solely a branch of mathematics. Therefore, the correct answer is "A step by step procedure for solving a problem."

Trojan-Horse programs are legitimate programs that appear harmless but actually allow unauthorized access to a system. They deceive users by disguising themselves as harmless software, tricking them into downloading or installing them. Once installed, these programs can give hackers remote access to the system, enabling them to steal sensitive information, control the system, or carry out malicious activities without the user's knowledge. These programs are a significant threat to cybersecurity as they exploit users' trust and can cause significant damage if not detected and removed.

The statement "non-volatile" is false when comparing disk to main memory. Disk is a non-volatile storage medium, meaning that it retains data even when power is lost. In contrast, main memory (RAM) is a volatile storage medium, meaning that it loses data when power is lost.

IBM released the first version of disk operating system DOS version 1.0 in 1981.