All Courses
Get the App Signup / Login
Sign in Open App
Computer Science Engineering (CSE) Exam  >  Computer Science Engineering (CSE) Tests  >  Database Management System (DBMS)  >  Test: Concept of keys - 2 - Computer Science Engineering (CSE) MCQ

Test: Concept of keys - 2 - Computer Science Engineering (CSE) MCQ


Test Description

10 Questions MCQ Test Database Management System (DBMS) - Test: Concept of keys - 2

Test: Concept of keys - 2 for Computer Science Engineering (CSE) 2024 is part of Database Management System (DBMS) preparation. The Test: Concept of keys - 2 questions and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus.The Test: Concept of keys - 2 MCQs are made for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Concept of keys - 2 below.
Solutions of Test: Concept of keys - 2 questions in English are available as part of our Database Management System (DBMS) for Computer Science Engineering (CSE) & Test: Concept of keys - 2 solutions in Hindi for Database Management System (DBMS) course. Download more important topics, notes, lectures and mock test series for Computer Science Engineering (CSE) Exam by signing up for free. Attempt Test: Concept of keys - 2 | 10 questions in 30 minutes | Mock test for Computer Science Engineering (CSE) preparation | Free important questions MCQ to study Database Management System (DBMS) for Computer Science Engineering (CSE) Exam | Download free PDF with solutions
Test: Concept of keys - 2 - Question 1
Save

Which one of the following is a set of one or more attributes taken collectively to uniquely identify a record?

Detailed Solution for Test: Concept of keys - 2 - Question 1
A super key is a set of one or more attributes that, taken collectively, can uniquely identify a record in a table. This includes primary keys, candidate keys, and any superset of them. For example, in a table of students, the combination of student ID and email could serve as a super key.
Test: Concept of keys - 2 - Question 2
Save

The subset of a super key is a candidate key under what condition?

Detailed Solution for Test: Concept of keys - 2 - Question 2
A candidate key is a minimal super key, meaning no proper subset of it can be a super key. If any subset of the super key is still a super key, it cannot be minimal. For instance, if {A, B} is a super key, neither {A} nor {B} alone can be a super key for it to be a candidate key.
1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: Concept of keys - 2 - Question 3
Save

Relational Algebra is a __________ query language that takes two relations as input and produces another relation as output of the query.

Detailed Solution for Test: Concept of keys - 2 - Question 3
Relational algebra is a procedural query language, meaning it specifies a sequence of operations to perform on relations to achieve the desired result. It involves operations like selection, projection, and join that manipulate relations and produce a new relation.
Test: Concept of keys - 2 - Question 4
Save
Which of the following is a fundamental operation in relational algebra?
Detailed Solution for Test: Concept of keys - 2 - Question 4
The fundamental operations of relational algebra include selection, projection, union, set difference, Cartesian product, and rename. Set intersection and natural join are not considered fundamental operations but can be derived from these fundamental operations.
Test: Concept of keys - 2 - Question 5
Save
A __________ is a property of the entire relation, rather than of the individual tuples in which each tuple is unique.
Detailed Solution for Test: Concept of keys - 2 - Question 5
A key is a property of the entire relation, ensuring that each tuple (row) in the relation is unique. This is fundamental to the concept of relational databases, where keys ensure the uniqueness and integrity of data. For instance, a primary key in a table uniquely identifies each record.
Test: Concept of keys - 2 - Question 6
Save
Which of the following is used to denote the selection operation in relational algebra?
Detailed Solution for Test: Concept of keys - 2 - Question 6
The selection operation in relational algebra is denoted by the Greek letter Sigma (σ). It is used to select tuples that satisfy a given predicate, such as σ_age > 30 (Employee).
Test: Concept of keys - 2 - Question 7
Save
For the select operation, the __________ appear in the subscript and the __________ argument appears in the parenthesis after the sigma.
Detailed Solution for Test: Concept of keys - 2 - Question 7
In the select operation, predicates (conditions) are written in the subscript, and the relation (table) to which these conditions apply is written in the parenthesis after the Sigma (σ). For example, σ_salary > 5000(Employee).
Test: Concept of keys - 2 - Question 8
Save
The relation with the attribute which is the Primary key is referenced in another relation. The relation which has the attribute as Primary key is called __________.
Detailed Solution for Test: Concept of keys - 2 - Question 8
The relation that contains the primary key is called the referenced relation. This is because it is referenced by a foreign key in another relation. For example, if "Department" is referenced by "Employee" through a foreign key, "Department" is the referenced relation.
Test: Concept of keys - 2 - Question 9
Save
An attribute in a relation is a foreign key if the __________ key from one relation is used as an attribute in that relation.
Detailed Solution for Test: Concept of keys - 2 - Question 9
A foreign key in a relation is an attribute that is a primary key in another relation. This key ensures referential integrity between the two relations. For example, in a "Student" table, "DepartmentID" could be a foreign key referencing the "DepartmentID" in a "Department" table.
Test: Concept of keys - 2 - Question 10
Save

For each attribute of a relation, there is a set of permitted values, called the __________ of that attribute.
Detailed Solution for Test: Concept of keys - 2 - Question 10

The domain of an attribute is the set of permissible values that it can take. This defines the nature of the data that can be stored in the attribute. For example, the domain of an attribute "age" could be all positive integers.

62 videos|66 docs|35 tests
Join Course
Information about Test: Concept of keys - 2 Page
In this test you can find the Exam questions for Test: Concept of keys - 2 solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Concept of keys - 2, EduRev gives you an ample number of Online tests for practice

Top Courses for Computer Science Engineering (CSE)

Download as PDF

Top Courses for Computer Science Engineering (CSE)

Important Questions for Concept of keys - 2

Find all the important questions for Concept of keys - 2 at EduRev.Get fully prepared for Concept of keys - 2 with EduRev's comprehensive question bank and test resources. Our platform offers a diverse range of question papers covering various topics within the Concept of keys - 2 syllabus. Whether you need to review specific subjects or assess your overall readiness, EduRev has you covered. The questions are designed to challenge you and help you gain confidence in tackling the actual exam. Maximize your chances of success by utilizing EduRev's extensive collection of Concept of keys - 2 resources.

Concept of keys - 2 MCQs with Answers

Prepare for the Concept of keys - 2 within the Computer Science Engineering (CSE) exam with comprehensive MCQs and answers at EduRev. Our platform offers a wide range of practice papers, question papers, and mock tests to familiarize you with the exam pattern and syllabus. Access the best books, study materials, and notes curated by toppers to enhance your preparation. Stay updated with the exam date and receive expert preparation tips and paper analysis. Visit EduRev's official website today and access a wealth of videos and coaching resources to excel in your exam.

Online Tests for Concept of keys - 2 Database Management System (DBMS)

Practice with a wide array of question papers that follow the exam pattern and syllabus. Our platform offers a user-friendly interface, allowing you to track your progress and identify areas for improvement. Access detailed solutions and explanations for each test to enhance your understanding of concepts. With EduRev's Online Tests, you can build confidence, boost your performance, and ace Concept of keys - 2 with ease. Join thousands of successful students who have benefited from our trusted online resources.
© EduRev
Education Revolution
Follow Us
Signup to see your scores go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup