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You can share these PDFs with your friends on social media to help others. Message-Oriented Communication in Distributed SystemĮmail: We know that some areas have a poor internet connection, and we want to make sure that everyone has the same opportunity to succeed by providing you with PDF files. Message-Oriented Communication in Distributed Computing Unhealthy Air Quality for Sensitive Groups What is considered Fine Particulate Matter?Īir Quality Meaning? How Is Air Quality Measured? What are the Two Causes of Air Pollution? What are the 3 Types of Pollution and their effects? What are the Sources of Environmental Pollution? Which of the following indicates the maximum number of entities that can be involved in a relationship? Given the basic ER and relational models, which of the following is INCORRECT?Ī) An attribute of an entity can have more than one valueī) An attribute of an entity can be compositeĬ) In a row of a relational table, an attribute can have more than one valueĭ) In a row of a relational table, an attribute can have exactly one value or a NULL valueĢ0. The total participation by entities is represented in E-R diagram asġ9. The relation changes can be got back using _ command.ġ8. In the above teaches relation ” Select * from teaches where Year = ‘2010’” displays how many rows?ġ7. How can the values in the relation teaches be deleted?ġ6. The relation with primary key can be created usingī) Create table instructor (Id, Name, primary key(name))Ĭ) Create table instructor (Id, Name, primary key (Id))ĭ) Create table instructor ( Id unique, Name )ġ5.

The query which selects the Course_id ‘CS-101’ from the section relation isĪ) Select Course_id from section where Building = ‘Richard’ ī) Select Course_id from section where Year = ‘2009’ Ĭ) Select Course_id from teaches where Building = ‘Packyard’ ĭ) Select Course_id from section where Sec_id = ‘3’ ġ4. The primary key in the section relation isġ3. What term is used to refer to a specific record in your music database for instance information stored about a specific album?ġ2. If you were collecting and storing information about your music collection, an album would be considered a(n) _ġ1.

Dbms mcq questions and answers pdf