DBMS Tutorial Point
1. What operator tests the column for the absence of data? A. EXISTS operator B. NOT operator C. IS NULL operator D. None of these Answer: C 2. In SQL, which command(s) is (are) used to change a table’s storage characteristic? A. ALTER TABLE B. MODIFY TABLE C. CHANGE TABLE D. All of the above … Read more
1. Which of the following relational algebra operations do not require the participating tables to be union-compatible? (A) ) Union (B) Intersection (C) Difference (D) Join Ans: (D) 2. Which of the following is not a property of transactions? (A) Atomicity (B) Concurrency (C) Isolation (D) Durability Ans: (B) 3. Checkpoints are a part of … Read more
Very important DBMS MCQ Questions . 1. Which data manipulation command is used to combines the records from one or more tables? A. SELECT B. PROJECT C. JOIN D. PRODUCT 2. SQL permits attribute names to be repeated in the same relation. (True or False) A. FALSE B. TRUE 3. Which of the following operations … Read more
1-A Database Management System (DBMS) is A. Collection of interrelated data B. Collection of programs to access data C. Collection of data describing one particular enterprise D. All of the above 2. Which of the following is not a level of data abstraction? A. Physical Level B. Critical Level C. Logical Level D. View Level 3. Disadvantages of File … Read more