Database Management Systems MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
Are you aiming to deepen your understanding of Database Management Systems? Our platform offers an extensive collection of basic computer MCQs and specialized computer science MCQs to help you excel in this field. Test your knowledge with our comprehensive MCQ tests online, featuring a wide range of computer MCQs with answers and detailed explanations. Additionally, you can review our selection of past paper computer MCQs to prepare effectively. We pride ourselves on being the best MCQs portal in the world, providing top-notch resources for learners of all levels.
If you’re searching for the best MCQs site for computer MCQs focused on Database Management Systems, look no further. Our site includes a variety of Pak MCQs and globally relevant materials, ensuring you have access to the best study aids available. Experience the difference with our expertly curated content and discover why we are considered the best MCQs portal in the world and the best MCQs site for computer MCQs. Start enhancing your skills today with our high-quality questions and answers tailored for Database Management Systems enthusiasts.
Which of the following is NOT a property of transactions in databases?
A. Redundancy
B. Atomicity
C. Isolation
D. Durability
Answer: Redundancy
In SQL, what does the ‘LIKE’ operator do?
A. Filters data based on a specified pattern
B. Deletes rows from a table
C. Joins two tables together
D. Sorts data in ascending order
Answer: Filters data based on a specified pattern
What is the purpose of ‘ROLLBACK’ in SQL?
A. To undo changes made during the current transaction
B. To save the current transaction
C. To create a new table
D. To remove a table from the database
Answer: To undo changes made during the current transaction
Which SQL statement is used to create an index?
A. CREATE INDEX
B. ADD INDEX
C. NEW INDEX
D. GENERATE INDEX
Answer: CREATE INDEX
What is the purpose of an ‘index’ in a database?
A. To improve the speed of data retrieval
B. To increase the size of the database
C. To remove duplicate entries
D. To enforce foreign key constraints
Answer: To improve the speed of data retrieval
Which of the following describes a ‘composite key’?
A. A key consisting of two or more columns
B. A key that can have duplicate values
C. A key used for foreign reference
D. A key with non-unique values
Answer: A key consisting of two or more columns
Which of the following is NOT a type of integrity constraint in databases?
A. Location integrity
B. Entity integrity
C. Domain integrity
D. Referential integrity
Answer: Location integrity
Which SQL statement is used to remove duplicate rows from a result set?
A. SELECT DISTINCT
B. SELECT UNIQUE
C. SELECT FILTER
D. SELECT NO DUPLICATE
Answer: SELECT DISTINCT
What is the purpose of the ‘COMMIT’ statement in SQL?
A. To save all changes made during the current transaction
B. To undo changes made during the current transaction
C. To delete rows from a table
D. To create a backup of the database
Answer: To save all changes made during the current transaction