Question
A, B and C can complete a work in 10, 20 and 15 days
respectively. A left the work 3 days before the work was completed and B left 1 days after A had left. The number of days required to complete the whole work is:Solution
A’s one day work = 1/10 B’s one day work = 1/20 C’s one day work = 1/15 Let total units of work be = 60 Efficiency of (A) = 6 Efficiency of (B) = 3 Efficiency of (C) = 4 Let ‘x’ days are required to complete the whole work. => 4x + 6(x-3) + 3(x-2) = 60 => 4x + 6x – 18 + 3x – 6 = 60 => 13x = 84 => x = 84/13 days
_________ term is used for those hardware devices that are not part of the main computer system and are often added later to the system.
What type of operating system manages a group of networked computers and makes them appear as a single computer?
Errors in computer programmes are called :
Recording a television programme on a VCR is an example of
A _________ is a text file that a Web browser stores on a user’s machine.Â
The largest unit of storage is
An Operating System is an example of:
Which of the following is the appropriate definition for Information Technology?
The most suitable type of network that phone lines would us is
What type of operating system switches tasks based on their priorities or external events?