Question
‘A’ and ‘B’ can do a piece of work in 20 days
and 30 days, respectively. If they started the work together and worked on it for 7 days, then find the time taken by ‘B’ alone to complete the remaining work.Solution
Let total amount of work be 60 units Efficiency of ‘A’ = 60/20 = 3 units/day Efficiency of ‘B’ = 60/30 = 2 units/day Amount of work done by ‘A’ and ‘B’ together in 7 days = (3 + 2) × 7 = 35 units Time taken by B to complete remaining work = (60 – 35)/2 = 12.5 days
Which of the following is true about a view in SQL?
Which command is used to remove all records from a table without deleting the table structure?
What is early binding in the context of OOP?
Which OOP principle allows a single interface to represent different underlying forms or data types?
The concept of "data hiding" is primarily achieved through which OOP principle?
Which SQL keyword is used to sort the result set?
Which of the following statements about abstract classes is true?
In C++, if a base class has a virtual function, and a derived class overrides that function, which mechanism ensures that the correct derived class func...
Which of the following is used to eliminate redundancy and anomalies in a database?
Which of the following prevents inheritance in C++?
Relevant for Exams:
