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Computer General Knowledge Questions and Answers

General Knowledge
31. In a ER diagram, an entity key of one file that also appears in another file
 
  • A. Logical key
  • B. Foreign key
  • C. Physical key
  • D. Primary key
Ans: C.
Physical key
 
 
32. A terabyte comprises
 
  • A. 1024 megabyte
  • B. 1024 byte
  • C. 1024 kilobyte
  • D. 1024 gigabyte
Ans: D.
1024 gigabyte
 
 
33. Information that comes from external source and fed into computer software is called
 
  • A. Input
  • B. Output
  • C. Reports
  • D. Throughout
Ans: A.
Input
 
34. Which of the following is the input device?
 
  • A. Barcode reader
  • B. Wand reader
  • C. Flatbed scanner
  • D. All the above
Ans: D.
All the above
 
35. The primary key must be
 
  • A. Related
  • B. Multiple
  • C. Unique
  • D. Numeric
Ans: C.
Unique