Operating System - 2

Phased conversion involves implementing a new system in stages or modules over a period of time, making it the longest and most gradual method of conversion compared to direct or pilot methods.

An interface serves as the point of interaction or communication between two distinct systems or sub-systems, allowing data or control to pass between them.

Crash conversion, also known as direct cutover, involves the immediate replacement of an old system with a new one without any transition period or parallel operation.

Structured design aims to produce programs that are modular, making them both easier to understand and easier to maintain. Therefore, both options (1) and (2) are correct.

When planning to convert to a computer system, management must consider various factors including software availability, vendor support, and hardware specifications like CPU capacity.

A system is defined by its interacting, diverse components working toward a common purpose within a boundary. Homogeneous components are not a characteristic of systems, which usually require diversity to function.

Good test data should be comprehensive and help verify all system paths. User participation is actually highly recommended during testing to ensure the system meets business requirements, making option A the incorrect characteristic.

A structure chart is a design tool that represents the hierarchical organization of modules in a program, showing the relationship and data flow between them.

The black box concept treats a system as a transformation process where only inputs and outputs are observed, assuming independence and stability of the process.

The black-box concept relies on the assumption that the transformation process within the box is consistent, meaning the relationship between inputs and outputs remains stable.

A feasibility document focuses on the viability of a project. While it includes problem descriptions and alternatives, a data flow diagram is a design tool used in later stages of system development, not typically in the initial feasibility report.

Option (4) is correct.

A functional primitive is the lowest level of a data flow diagram that cannot be decomposed further, representing a single, specific task or process.

A packaged design includes all necessary documentation for implementation, such as flowcharts, report layouts, and detailed module descriptions.

A Request for Proposal (RFP) is a document issued by a company to solicit bids from external vendors for the development or provision of a new system.

An organization manual serves as the central repository for all policies, procedures, and regulations governing an organization. Other options like procedure logs or policy books are typically too narrow in scope.

In standard systems flowcharting, the online keyboard symbol is specifically used to represent the manual entry of data into a computer system.

In the context of IDEF0 (Integration Definition for Function Modeling) and related data flow methodologies, an actigram is a diagram that represents the activities, processes, and procedures of a system.

Systems investigation is a formal process that can be triggered by various events, including scheduled reviews, specific management requests, or identified performance issues during analysis.

A written narrative provides a detailed, step-by-step textual description of a procedure, whereas flowcharts provide a visual representation.