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Question
Which concurrency control technique uses read and write
locks to ensure consistency?Solution
Two-phase locking (2PL)
Present age of ‘P’ is 50% more than that of ‘Q’. 6 years ago, ‘P’ was twice as old as ‘Q’. What is the present age of ‘Q’?
...Three workers W1, W2 and W3 got work from the contractor. In 5 days, ‘W1’ completed 25% of work. ‘W2’ is 20% less efficient than ‘W1’ but ta...
If '+' means '-' , '-' means 'x' , 'x' means '÷' , '÷' means '+' , then what will be the value of ' 500 x 50 - 20 ÷ 50 + 40 ' = ?
...- The sum of the present age of 'T' and 'O' is 60 years. The ratio of the age of 'T' and 'O' before 10 years is 3:5 respectively. Find the age of 'O' after 1...
The average of x numbers is 24. If 60% of these numbers are reduced by 5 and the remaining 40% are increased by 10, what will be the new average of the ...
Yukti borrowed a total of ₹24,000, dividing it into two parts. She paid simple interest on one part at 18% per annum and on the other part at 12% per ...
A plastic toy costs ₹7. A plastic spoon costs ₹5. X spends ₹38 on these plastic items. Find the number of plastic toys he/she purchased?
Currently, the combined age of Rajesh and Ramesh is 77 years. One year ago, the ratio of their ages was 7:8, with Rajesh being 7 parts and Ramesh being ...
The nine digit number 9x48879y4 is divisible by 88. Find the value of √xy, given that x < 8 and y < 8.
Two students appeared in an exam and one secured 13 marks more than the other. If marks of student who got more marks is 60% of the sum of the marks of ...
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