0
Q:

STUFF and REPLACE are used to replace characters in a string

 

A) TRUE B) FALSE

Answer:   A) TRUE



Explanation:

They both are used to replace characters in a string

Q:

Which packages contain the JDBC classes?

A) java.sql B) java.sl
C) java.jd D) java.jdbc
 
Answer & Explanation Answer: A) java.sql

Explanation:

The Java packages which contain JDBC classes and interfaces is Java.SQL.

Report Error

View Answer Report Error Discuss

5 26817
Q:

Count function in SQL returns the number of

A) groups B) values or rows
C) columns D) distinct values
 
Answer & Explanation Answer: B) values or rows

Explanation:

Count function in SQL returns the number of values or rows.

Report Error

View Answer Report Error Discuss

2 2824
Q:

The SQL keyword(s) ________ is used with wildcards.

A) LIKE only B) IN only
C) NOT IN only D) IN and NOT IN
 
Answer & Explanation Answer: A) LIKE only

Explanation:
Report Error

View Answer Report Error Discuss

4 12252
Q:

A relational database developer refers to a record as

A) a relation B) an attribute
C) a criteria D) a tuple
 
Answer & Explanation Answer: D) a tuple

Explanation:

A relational database developer refers to a record as a tuple.

Report Error

View Answer Report Error Discuss

7 12625
Q:

What is an Extension of Entity Type?

Answer

The collections of entities of a particular Entity Type are grouped together into an entity set.

Report Error

View answer Workspace Report Error Discuss

1 1834
Q:

How many joining conditions are required to join 4 tables in SQL?

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: C) 3

Explanation:

To join 'n' tables 'n-1' conditions should be satisfied.

So to join 4 tables 3 conditions should be satisfied.

Report Error

View Answer Report Error Discuss

5 10766
Q:

Data integrity constraints are used to

A) Ensure that duplicate records are not entered into the table B) Prevent users from changing the values stored in the table
C) Control who is allowed access to the data D) Improve the quality of data entered for a specific property like table column
 
Answer & Explanation Answer: D) Improve the quality of data entered for a specific property like table column

Explanation:

Integrity constraints are used to ensure accuracy and consistency of data in a relational database. Data integrity is handled in a relational database through the concept of referential integrity. Many types of integrity constraints play a role in referential integrity (RI).

 

Hence, Data integrity constraints are used to Improve the quality of data entered for a specific property i.e, table column.

Report Error

View Answer Report Error Discuss

0 3151