41. A ............ is a collection of data that is stored electronically as a series of records in a table.

1. 1. spreadsheet

   
   
   

   2. presentation

   
   
   

   3. database

   
   
   

   4. Web page

   
   
   

   5. None of the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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42. In files, there is a key associated with each record which is used to differentiate among different records, For every file, there is atleast one set of keys that is unique. Such a key is called

1. 1. unique key

   
   
   

   2. prime attribute

   
   
   

   3. index key

   
   
   

   4. primary key

   
   
   

   5. null key

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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43. Rows of a relation are called

1. 1. relation

   
   
   

   2. tuples

   
   
   

   3. data structure

   
   
   

   4. an entity

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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44. Which of the following types of table constraints will prevent the entry of duplicate rows ?

1. 1. Primary key

   
   
   

   2. Unique

   
   
   

   3. Null

   
   
   

   4. Foreign key

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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45. The dBASE III Plus is mostly used for

1. 1. office automation

   
   
   

   2. database management problems

   
   
   

   3. scientific problems

   
   
   

   4. calculations only

   
   
   

   5. None of the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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