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MCQ Practice

Computer & IT MCQs

1 nibble equals to ____.

  • A. 12 bits
  • B. 16 bits
  • C. 4 bits
  • D. 2 bits
Explanation:
One nibble is equal to 4 bits (half a byte).

1 KB (Kilobyte) is equal to ____.

  • A. 1024 Megabytes
  • B. 1024 bits
  • C. 1024 bytes
  • D. 100 bits
Explanation:
1 KB = 1024 bytes.

1 Gigabyte is equal to ____.

  • A. 1024 bits
  • B. 1032 megabytes
  • C. 1024 kilobytes
  • D. 1024 megabytes
Explanation:
1 GB = 1024 MB (using binary prefixes).

1 Byte is equal to ____.

  • A. 8 bits
  • B. 4 bits
  • C. 2 bits
  • D. 9 bits
Explanation:
One byte is the basic unit of digital information and consists of 8 bits.

The first phase of the systems development life cycle is ____.

  • A. Systems investigation
  • B. Systems maintenance
  • C. Systems analysis
  • D. Systems design
Explanation:
The Systems Development Life Cycle (SDLC) begins with Systems Analysis to understand requirements and problems.

What Cascade Delete option is used for?

  • A. It is used to delete all the records of all tables in a database
  • B. It repeats the recent delete operation on all the records of the current table
  • C. It ensures that all the related records will be deleted automatically when the record from the parent table is deleted
  • D. None of these
Explanation:
Cascade Delete automatically removes related child records when a parent record is deleted, maintaining referential integrity.

Which function is used to find the string length in “FPSC,” and answers “4”?

  • A. Len(“FPSC”)
  • B. Length(“FPSC”)
  • C. Str(FPSC)
  • D. None of these
Explanation:
The Len() function returns the number of characters in a string.

In MS Access, in which method do you not need to specify the field type and size when creating a new table?

  • A. Create a table in Design View
  • B. Create a table using the wizard
  • C. Create a table by entering data
  • D. All of these
Explanation:
“Create Table by Entering data” (Datasheet View) lets Access automatically detect and assign field types.

How can you ensure the security of electronic data in databases?

  • A. Implementing encryption
  • B. Using graphic design
  • C. Regularly updating software
  • D. Increasing database size
Explanation:
Encryption is the primary method to protect electronic data from unauthorized access.

What is the best way to store electronic record backups?

  • A. To duplicate the data
  • B. Paper-based backup
  • C. Flashing
  • D. None of these
Explanation:
Duplicating (copying) electronic data to another secure location is the standard and best backup method.