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Explain twe functions of computer directories in a computer system. (4 marks}DICT MOD 1 July 2020
Organizing files: Directories can be used to organize files into logical groups, making it easier to find and access specific files. For example, a user might create separate directories for documents, images, and music files. Managing permissions: Directories can be used to manage permissions, whicRead more
Outline four computer disk head scheduling algorithms. (4 marks)DICT MOD 1 July 2020
First Come, First Served (FCFS): The FCFS algorithm processes requests for disk access in the order in which they are received. This is a simple algorithm, but it can result in poor performance if there are long sequences of requests that are far apart on the disk. Shortest Seek Time First (SSTF): TRead more
Explain two circumstances under which biometric security system could be used for the purpose of file security. (4 marks)DICT MOD 1 July 2020
A biometric security system is a system that uses physical or behavioral characteristics of an individual to authenticate their identity. Biometric security systems can be used in a variety of contexts, including for the purpose of file security. Here are two circumstances under which a biometric seRead more
A biometric security system is a system that uses physical or behavioral characteristics of an individual to authenticate their identity. Biometric security systems can be used in a variety of contexts, including for the purpose of file security. Here are two circumstances under which a biometric security system could be used for this purpose:
Outline four essential approaches used when implementing mutual exclusion to manage shared resources. (4 marks)DICT MOD 1 July 2020
Mutual exclusion is a technique used to manage shared resources in a computer system, in order to ensure that only one process or thread can access the resource at a time. There are several approaches that can be used when implementing mutual exclusion, and each approach has its own advantages and dRead more
Mutual exclusion is a technique used to manage shared resources in a computer system, in order to ensure that only one process or thread can access the resource at a time. There are several approaches that can be used when implementing mutual exclusion, and each approach has its own advantages and disadvantages. Here are four essential approaches:
The CPU passes information to and from an input/output device using the computer buses. Explain three types of such buses. (6 marks)DICT MOD 1 July 2020
System bus: The system bus is a high-speed bus that connects the CPU to the main memory and other components of the system. It is responsible for transferring data, instructions, and other information between the CPU and other components of the computer. Peripheral bus: The peripheral bus is a lowerRead more
Explain two advantages of memory overlay. (4 marks)DICT MOD 1 July 2020
Memory overlay is a technique that is used to allow a program to execute in a memory space that is smaller than the size of the program. It works by loading different parts of the program into memory as needed and then unloading them when they are no longer needed. There are several advantages to usRead more
Memory overlay is a technique that is used to allow a program to execute in a memory space that is smaller than the size of the program. It works by loading different parts of the program into memory as needed and then unloading them when they are no longer needed. There are several advantages to using memory overlay:
A computer technician intends to manage computer files. Explain four file operations he could perform during this process. (8 marks)DICT MOD 1 July 2020
other software. This could include creating documents, spreadsheets, presentations, or other types of files. Copying files: The technician may copy files from one location to another, either within the same storage device or between different storage devices. This could be useful for creating backupRead more
Explain two circumstances that would cause user level threading during process execution. (4 marks)DICT MOD 1 July 2020
User level threading occurs when a program creates and manages its own threads, rather than relying on the operating system to do so. There are several circumstances that may cause a program to use user level threading during process execution: The program requires a high degree of control over theRead more
User level threading occurs when a program creates and manages its own threads, rather than relying on the operating system to do so. There are several circumstances that may cause a program to use user level threading during process execution:
Explain two categories of computer input/output devices in respect to data transfer. (4 marks)DICT MOD 1 July 2020
Computer input/output (I/O) devices are devices that allow a computer to communicate with the outside world by transferring data in and out of the system. There are several categories of I/O devices, and they can be classified according to various criteria, such as the type of data transfer they supRead more
Computer input/output (I/O) devices are devices that allow a computer to communicate with the outside world by transferring data in and out of the system. There are several categories of I/O devices, and they can be classified according to various criteria, such as the type of data transfer they support. Here are two categories of I/O devices in respect to data transfer:
The administrator of a computer intends to identify the properties of files in a directory. State eight file properties that he may identify. (4 marks)DICT MOD 1 July 2020
File name: The name of the file, which is typically used to identify the file and distinguish it from other files. File type: The type of file, which is typically determined by the file extension (e.g. .doc, .pdf, .txt). File size: The size of the file in bytes, kilobytes, megabytes, or gigabytes. FRead more