PPSC FPSC KPPSC BPSC SPSC Lecturer Computer Science Test 46

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There will be 25 multiple choice question in the test.
Answer of the questions will change randomly each time you start this test.
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Test Instructions:-
Test Name Lecturer Computer Science 
Subject Computer Science Test 45
Test Type MCQs
Total Questions 25
Total Time 20 Minutes
Total Marks 100

You have 20 minutes to pass to the quiz.

Lecturer Computer Science Online Test No. 46

1 / 25

The ___________ operation, denoted by −, allows us to find tuples that are in one relation but are not in another.

2 / 25

Which of the following is a fundamental operation in relational algebra?

3 / 25

Relational Algebra is a .............query language that takes two relation as input and produces another relation as output of the query.

4 / 25

Which of the following can be a multivalued attribute?

5 / 25

The attribute name could be structured as a attribute consisting of first name, middle initial, and last name . This type of attribute is called

6 / 25

The assignment operator is denoted by

7 / 25

Not applicable condition can be represented in relation entry as:

8 / 25

An entity in A is associated with at most one entity in B, and an entity in B is associated with at most one entity in A. This is called as

9 / 25

The attribute AGE is calculated from DATE_OF_BIRTH . The attribute AGE is

10 / 25

Which of the following is a single valued attribute

11 / 25

In a relation between the entities the type and condition of the relation should be specified. That is called as______attribute

12 / 25

Which is a unary operation:

13 / 25

Which of the following is used to denote the selection operation in relational algebra?

14 / 25

..................., express the number of entities to which another entity can be associated via a relationship set.

15 / 25

The function that an entity plays in a relationship is called that entity‘s..........

16 / 25

The descriptive property possessed by each entity set is

17 / 25

Which is a join condition contains an equality operator:

18 / 25

For select operation the ________ appear in the subscript and the ___________ argument appears in the parenthesis after the sigma.

19 / 25

Which of the following statements creates a new table temp instructor that has the same schema as instructor.

20 / 25

Which of the following is not outer join?

21 / 25

In precedence of set operators the expression is evaluated from

22 / 25

An ________ is a set of entities of the same type that share the same properties, or attributes .

23 / 25

Entity is a:

24 / 25

An entity in A is associated with at most one entity in B. An entity in B, however, can be associated with any number (zero or more) of entities in A.

25 / 25

In contemporary databases the top level of the hierarchy consists of ______, each of which can contain _____.

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