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Q1. In an Entity-Relationship Diagram “Diamonds” represents
(A) Attributes
(B) Multi-valued attributes
(C) Weak entity set
(D) Relationship sets
Answer:(D) Relationship sets
Q2. Which language has recently become the de-facto standard for interfacing application programs with relational database system?
(A) Oracle
(B) SQL
(C) 4GL
(D) None of the above
Answer: (B) SQL
Q3. Data Manipulation Language (DML) is not to
(A) Create information table in the Database
(B) Insertion of new information into the Database
(C) Deletion of information in the Database
(D) Modification of information in the Database
Answer: (A) Create information table in the Database
Q4. A good query system
(A) Can accept English language commands
(B) Allows non-programmers to access information stored in a database
(C) Can be accessed only by data processing professionals
(D) Both (a) and (b)
Answer: (B) Allows non-programmers to access information stored in a database
Q5. Which of the following hardware components is the most important to the operation of a database management system?
(A) High-resolution video display
(B) Printer
(C) High speed, large-capacity disk
(D) Plotter
Answer: (C) High speed, large-capacity disk
Q6. Which algebra is widely used in DBMS?
(A) Relational algebra
(B) Arithmetic algebra
(C) Both
(D) None
Answer: (A) Relational algebra
Q7. A computer file can be best described as
(A) A single data item
(B) A general collection of data items
(C) An orderly collection of data items
(D) A random collection of data items
Answer: C) An orderly collection of data items
Q8. In precedence of set operators the expression is evaluated from:
(A) Left to Left
(B) Left to Right
(C) Right to Right
(D) Right to Left
Answer: (B) Left to Right
Q9. Each of data files has a _ that describe the way the data is stored in the file.
(A) File structure
(B) Records
(C) Fields
(D) Database
Answer: (A) File structure
Q10. In SQL, GRANT command is used to
(A) Allow user to access databases
(B) Allow user to create databases
(C) Grant system privileges, roles, and object privileges to uses and roles
(D) Choose auditing for specific SQL commands
Answer: (C) Grant system privileges, roles, and object privileges to uses and roles
Q11. How many types of keys in Database Design?
(A) Candidate key
(B) Primary key
(C) Foreign key
(D) All of these
Answer: (D) All of these
Q12. The data dictionary tells the DBMS
(A) What files are in the database
(B) What attribute are possessed by the data
(C) What these files contain
(D) All of the above
Answer: (D) All of the above
Q13. The minimal set of super key is called
(A) Primary key
(B) Secondary key
(C) Candidate key
(D) Foreign key
Answer: (C) Candidate key
Q14. In SQL, which command is used to select data in rows and column from one or more tables?
(A) CHOOSE
(B) SELECT
(C) LIST
(D) BROWSE
Answer: (B) SELECT
Database Management System MCQ – All Set
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