Question : Which of the following options given below are not an example of integrity constraint - 

Option 1: NOT NULL

Option 2: PRIMARY KEY

Option 3: COUNT

Option 4: UNIQUE

Question : What is primary key. Choose from the options given below - 

Option 1: A Primary key is a field or a combination of fields that can uniquely identify a row/tuple in a table/relation.

Option 2: A Primary key in table/relation is any non-primary key field which also stores unique values for each row just like a primary-key does. But only one key is designated as primary key. So unique refers to a unique non-key field of a table.

Option 3: A Primary key is a field of a table which is the primary key of another table through a foreign key a relationship is established between two tables.

Option 4: None of the above

Question : Which of the following statements is true?

Option 1: A Primary key is also a candidate key.

Option 2: Each relation has at least one foreign key.

Option 3: Foreign keys can't have null values.

Option 4: A Primary key is also an alternate key.

Question : Directions: Which one of the given responses will be a meaningful order of the following?
1. Key  2. Door  3. Lock  4. Room

Option 1: 4, 2, 1, 3

Option 2: 1, 2, 3, 4

Option 3: 1, 3, 2, 4

Option 4: 1, 2, 4, 3

Question : Directions: In the question, a part of the sentence is in bold. Below are given alternatives to the bold part at (1), (2), and (3) that may improve the sentence. Choose the correct alternative. In case no improvement is needed, your answer is (4).

I can always count on him in times of difficulty.

(1) count him on

(2) count on he

(3) count at him

(4) No Improvement

Option 1: (1)

Option 2: (2)

Option 3: (3)

Option 4: (4)

Question : Direction: Which one of the given responses is the meaningful order of the following?

1. Infancy     2. Adult      3. Puberty       4. Childhood

Option 1: 1, 2, 3, 4

Option 2: 1, 4, 2, 3

Option 3: 1, 3, 4, 2

Option 4: 1, 4, 3, 2