Database Management Systems MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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What is normalization in databases?
A. The process of organizing data to reduce redundancy
B. A way to back up data
C. The process of creating indexes
D. The process of encrypting data
Answer: The process of organizing data to reduce redundancy
What is a ‘transaction’ in database management?
A. A sequence of operations performed as a single logical unit of work
B. A command to retrieve data
C. A way to back up data
D. A function that updates records
Answer: A sequence of operations performed as a single logical unit of work
Which command is used to delete data from a database table?
A. DELETE
B. DROP
C. TRUNCATE
D. REMOVE
Answer: DELETE
What is a ‘foreign key’ in a database?
A. A key that uniquely identifies records in a different table
B. A key used to encrypt data
C. A unique identifier within the same table
D. A column that has no duplicate values
Answer: A key that uniquely identifies records in a different table
What is a ‘primary key’ in a database?
A. A unique identifier for each record in a table
B. A column used to store passwords
C. A key that can have multiple values
D. A foreign key that references other tables
Answer: A unique identifier for each record in a table
What does ‘ACID’ stand for in database systems?
A. Atomicity, Consistency, Isolation, Durability
B. Application, Consistency, Isolation, Durability
C. Authentication, Communication, Integration, Data
D. Atomicity, Communication, Information, Durability
Answer: Atomicity, Consistency, Isolation, Durability
What is SQL used for in a database?
A. To define the structure of a database
B. To retrieve, manipulate, and manage data
C. To store files in the database
D. To create user interfaces
Answer: To retrieve, manipulate, and manage data
What is a relational database?
A. A database that organizes data into tables with rows and columns
B. A database that stores data as flat files
C. A non-structured form of data storage
D. A database that uses key-value pairs
Answer: A database that organizes data into tables with rows and columns