CSCI 3700 Midterm Exam Questions With Verified Answers.
8 views 0 purchase
Course
CSCI 3700
Institution
CSCI 3700
CSCI 3700 Midterm Exam Questions With
Verified Answers.
Database management system - answerA collection of interrelated data in an environment that
is convenient and efficient to use.
Collections that are highly valuable, relatively large, and accessed by multiple users and
applications, often...
CSCI 3700 Midterm Exam Questions With
Verified Answers.
Database management system - answer✔A collection of interrelated data in an environment that
is convenient and efficient to use.
Collections that are highly valuable, relatively large, and accessed by multiple users and
applications, often at the same time. - answer✔Database systems are used to manage this kind of
data.
Database management system - answer✔A complex software system whose task is to manage a
large, complex collection of data.
Data that is redundant, inconsistent, and difficult to access. - answer✔This type of data occurred
when database applications were stored directly on file systems.
False - answer✔True or false: When databases were built on file systems, integrity constraints
were defined clearly and explicitly.
Atomicity of updates - answer✔An important feature of databases that ensures tables do not exist
in an inconsistent state.
True - answer✔True or false: Databases allow controlled concurrent access.
Database management system - answer✔A collection of interrelated data and a set of programs
that allow users to access and modify this data.
Data model - answer✔A collection of conceptual tools for describing data, data relationships,
data semantics, and consistency constraints.
Data abstraction - answer✔Hides the complexity of data structures to make them more
presentable to users.
False - answer✔True or false: SQL databases use a semi-structured data model.
Relational model - answer✔The type of data model used by SQL databases.
Physical level - answer✔Describes how a record is stored.
Logical level - answer✔Describes data stored in a database and the relationships among the data.
View level - answer✔Hides certain details so different user roles can see various amounts of
data.
Logical schema - answer✔The overall logical structure of a database.
Physical schema - answer✔The overall physical structure of a database.
Instance - answer✔The actual content of a database at a particular point in time.
Physical data independence - answer✔The ability to modify the physical schema without
changing the logical schema.
True - answer✔True or false: Interfaces between various database levels should be well-defined
so that changes in one part do not seriously influence the others.
Data definition language (DDL) - answer✔Specification notation for defining the database
schema.
Data dictionary - answer✔Stores table templates generated by a DDL compiler.
Database schemas, integrity constraints, and authorization. - answer✔Data dictionaries store this
kind of metadata.
Database manipulation language (DML) - answer✔A language for accessing and updating the
data organized by a particular data model.
Procedural - answer✔A type of DML that requires a user to specify what data is needed and how
to get that data.
Declarative - answer✔A type of DML that requires a user to specify what data is needed without
specifying how to get it.
Query language - answer✔The portion of a DML that involves informational retrieval.
Structured query language (SQL) - answer✔A nonprocedural query language that takes one or
more tables as input and returns only one.
False - answer✔True or false: SQL is a Turing complete language.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller sirjoel. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
