IT Officer Questions | Basic Computer Knowledge


Which of the following maintenance strategies involves performing maintenance before problems occur to avoid breakdowns and disruptions?

   A.) Perfective Maintenance
   B.) Corrective Maintenance
   C.) Adaptive Maintenance
   D.) Preventive Maintenance

Answer: Option 'D'

Preventive Maintenance


What would be the worst run time complexity of queue and dequeue operations, if queue is implemented using arrays?

   A.) O(n),O(n)
   B.) O(n),O(1)
   C.) O(1),O(n)
   D.) O(1),O(1)

Answer: Option 'D'



A linked list that has no beginning and no end is called _______

   A.) Doubly linked list
   B.) Singly linked list
   C.) Circular linked list
   D.) None of these

Answer: Option 'C'

Circular linked list


Circuit Switching takes place at which layer?

   A.) Transport layer
   B.) Application layer
   C.) Physical layer
   D.) Presentation layer

Answer: Option 'C'

​Physical layer


Rows of a relation are called ________

   A.) entity
   B.) degree
   C.) tuples
   D.) None of these

Answer: Option 'C'


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