Related Questions

A phantom read occurs when a transaction rereads data it has previously read and finds modifications or deletions caused by a committed transaction.
Which of the following occurs when a transaction rereads data and finds new rows that were inserted by a command transaction since the prior read?
The following questions are based on the information given below: An advertising agency finds that, of its 170 clients, 115 read Indian Express, 110 read The Hindu and 130 read Times of India. Also 85 read Indian Express and Times of India, 75 read Indian Express and The Hindu, 95 read The Hindu and Times of India and 70 read all the three. How many read Indian Express and Times of India but not The Hindu?
The following questions are based on the information given below: An advertising agency finds that, of its 170 clients, 115 read Indian Express, 110 read The Hindu and 130 read Times of India. Also 85 read Indian Express and Times of India, 75 read Indian Express and The Hindu, 95 read The Hindu and Times of India and 70 read all the three. How many read only The Hindu?
The following questions are based on the information given below: An advertising agency finds that, of its 170 clients, 115 read Indian Express, 110 read The Hindu and 130 read Times of India. Also 85 read Indian Express and Times of India, 75 read Indian Express and The Hindu, 95 read The Hindu and Times of India and 70 read all the three. How many read only Indian Express?
Which of the following statements are true?
Statement I Big data refers to no precise quantity, but generally refers to data in the range of Petabytes and Exabyte, i.e. billions to trillions of records, all from various sources. Big data is generated much faster. than traditional data in much larger quantities.
Statement II Big data interests industries because they are able to learn more patterns and curious variances than smaller data sets, with the capability to provide valuable insights into consumer behaviour, weather systems, financial market activity, or other phenomena.
Statement III Various departments and product lines use various applications within most organisations and store data in separate datasets. These separate databases may contain similar data, but data from one data base to another is not always consistent. This is called data silo.
In a town of 500 people, 285 read Hindu and 212 read Indian Express and 127 read Times of India, 20 read Hindu and Times of India and 29 read Hindu and Indian Express and 35 read Times of India and Indian express . 50 read no news paper . Then how many read only one paper ?
________ allows only committed data to be read and further requires that no other transaction is allowed to update it between two reads of a data item by a transaction.
Which of the following statement is true?
Statement I A data warehouse is a database that keeps historical and current data of significant interest throughout the company for decision makers.
Statement II The data originates from several core operating payment systems such as sales systems, customer accounts and production and may include website transaction data.
Statement III The data warehouse covers historical past data inside the institution from multiple operating systems.
If a transaction does not modify the database until it has committed it is said to use a _______ modification technique