DBMS-Relational Algebra and Calculus Questions and Answers
Relational Algebra and Relational Calculus form the theoretical foundation of DBMS programming questions and answers frequently asked in technical interviews and campus placement exams such as TCS, Infosys, and Accenture. These topics explain how queries are represented and optimized in databases. By understanding operations like selection, projection, join, and division, you can effectively translate queries into SQL. Practicing DBMS MCQs and programming interview questions with answers improves your understanding of database logic, query design, and relational schema concepts essential for technical placements.
DBMS-Relational Algebra and Calculus
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81 questions
41. Which of the following aspects of data is the concern of a relational database model ?
- data manipulation
- data integrity
- data structure
- all of these
42. What is the smallest unit of data in the relational model ?
- data type
- field
- data value
- none of these
43. Dr. Edgar F. Codd proposed a set of rules that were intended to define the important characterstic and capabilities of any relational system.
- TRUE
- FALSE
44. Codd's Logical Dta independence rule states that user operations and application programs should be independent of any changes in the logical structure of base tables provided they involve no loss information
- TRUE
- FALSE
45. The entire field of RDBMS has its origin in Dr. E.F. Codd's paper.
- TRUE
- FALSE
46. ISBL has no aggregate operators for example, agverage, mean and so on.
- TRUE
- FALSE
47. ISBL has no facilities for insertion, deletion or modification of tuples.
- TRUE
- FALSE
48. QUEL is a tuple relational calculus language of a relational database system INGRESS (Interactive Graphics and Retrieval system).
- TRUE
- FALSE
49. QUEL supports relational algebraic operations such as intersection, minus or union.
- TRUE
- FALSE