Bissoy.com
Doctors Medicines MCQs Q&A

Related Questions

Consider two database relations R and S having 3 tuples in R and 2 tuples in S. what is the maximum number of tuples that could appear in the natural join of R and S?
Which one of the following provides the ability to query information from the database and to insert tuples into, delete tuples from, and modify tuples in the database?
Which of the following statements are true? i) practical application of XOR linked lists are in environments with limited space requirements, such as embedded devices. ii)xor lists are not suitable because most garbage collectors will fail to work properly with classes or structures that don’t contain literal pointers iii)in order to calculate the address of the next node you need to remember the address of the previous node iv)xor lists are much efficient than single, doubly linked lists and arrays
Statements: All exams are easy. Some easy are not pass. No pass is clear. Conclusion: I. All exams are clear. II. Some exams are not clear. III. Some clear are not easy.
What is the purpose of the remove() method for lists and tuples?
What is the purpose of the reverse() method for lists and tuples?
What is the purpose of the count() method for lists and tuples?
Match the following two sets, in which Set I indicate the underlying purpose and Set II status the levels of teaching. Set I (underlying purpose) Set II (Levels of teaching) (a)  The main objective is to know the subject in depth and developing insight leading to clarity of structures. (i) Autonomous development level (b) The main emphasis is on orderly presentation of thoughts leading to their longer retention (ii) Memory level (c) The basic purpose is to engages students in clear, coherent and critical thinking leading to patterns of thought (iii) Understanding level (d) Purpose is to promote self-feelings leading to a sense of freedom (iv) Reflective level   Select the correct answer from the following options.
Consider two relations R1(A, B) with the tuples (1, 5), (3, 7) and R2(A, C) = (1, 7), (4, 9). Assume that R(A, B, C) is the full natural outer join of R1 and R2. Consider the following tuples of the form (A, B, C): a = (1, 5, null), b = (1, null, 7), c = (3, null, 9), d = (4, 7, null), e = (1, 5, 7), f = (3, 7, null), g = (4, null, 9). Which one of the following statements is correct?
SQL allows duplicate tuples in relations, and correspondingly defines the multiplicity of tuples in the result of joins. Which one of the following queries always gives the same answer as the nested select * from R where a in (select S.a from S)