Question

In parallel computing, what is the meaning of “skew”?

Select one:

a. The number of operations in one of the parallel processors starts increasing exponentially.

b. In the distribution of work among the processors, some processors are getting a larger number of tuples than others.

c. One of the parallel processors overheats and in a chain reaction the same happens to all other processors.

d. One parallel processor runs hotter than the others.

e. The number of operations rises beyond reasonable limits.

What operation is responsible for the retrieval of information from a database in a transaction schedule?

Select one:

a. Get

b. Pull

c. See

d. Read

e. Retrieve

Logical, physical and view levels are elements of the model of…

Select one:

a. Entity Relationship (ER)

b. Data Abstraction

c. Domain Model Language (DML)

d. Domain Object Model (DOM)

e. Backup and Recovery

Which of the following is NOT commonly understood as a type of database user?

Select one:

a. Naïve user

b. Sophisticated user

c. Specialized user

d. Native user

e. Application programmer

Answer 1

Question 1

In parallel computing, what is the meaning of “skew”?

Answer Option B. In the distribution of work among the processors, some processors are getting a larger number of tuples than others.

The distribution of tuples to disks or processors can be skewed, means some disks or processors have many tuples while others may have fewer tuples.

Question 2

What operation is responsible for the retrieval of information from a database in a transaction schedule?

Answer Option D. read

For transaction schedule there are read and write operations, read is for retrival and write is for write and add new data.

No any operations named Get, Pull, See, retrive is in transaction schedule.

Question 3

Logical, physical and view levels are elements of the model of…

Answer Option B. Data Abstraction

Other option don't have any type of levels like this 3-tier levels. Data abstraction provides 3 tier architecture and those 3 tiers-levels are logical, physical and view.

Question 4

Which of the following is NOT commonly understood as a type of database user?

There are different types of DB users like

Database Administrator(DBA)

Naive users

System analyst

Sophisticated users

DB designers

Application programmers

Casual users

Thus, From option not in DB user is

Answer Option C Specialized user