Database Management Systems

  Transaction log is a history of actions executed by a DBMS to guarantee ACID properties over crashes or hardware failures.

The Network model is a record-based logical data model that organizes data in a graph structure with records as nodes and relationships as edges. The Object-oriented model is object-based, not record-based. The E-R model is a conceptual modeling tool, not a logical model. Object-based is a category, not a specific model.

Data abstraction has three levels: Physical (lowest), Logical (middle), and View (highest). The View level provides the highest level of abstraction by showing users only the data they need without exposing underlying structures. It simplifies data access by hiding complexity.

Internal schema or physical schema define how and where data are stored or organized in a physical data storage.

This object in distributed database receives a request for information from another node.

This is a Java tool that provides a database programming interface for Java programs.

MIS (Management Information Systems) handles structured, routine decisions using predefined reports and data - it's NOT designed for unstructured problems. DSS (Decision Support Systems) specifically addresses unstructured decisions through analytical models, what-if analysis, and specialized databases. Statement 2 correctly describes DSS architecture.

It is a data structure that contains all the information about a process within an operation system.

The ProDom database contains protein domain families generated from the UniProtKB database by automated sequence comparisons.

Correct answer. Secondary databases contain results from the analysis of sequences in the primary databases. Examples of secondary databases are PROSITE and Pfam.

Correct answer. The Biological General Repository for Interaction Datasets (BioGRID) is a curated biological database of protein-protein and genetic interactions.

Correct answer. TreeFam is a database of evolutionary trees of animal genes which aims at developing a curated resource that gives reliable information about ortholog and paralog assignments, and evolutionary history of various gene families.

A data warehouse is a centralized repository that stores all information collected during database development, designed for query, analysis, and reporting. A repository typically stores metadata, RAD is a methodology, and CASE is a category of development tools.