Which concurrency control technique uses read and write locks to ensure consistency?

Select the letter that can replace the question mark (?) in the following series.

A, C, E, G, I, Κ, ?

Which of the following Venn diagrams best represents the relationship between stars, planets and universe ?

‘Track’ is related to ‘Athlete’ in the same way as ‘Classroom’ is related to ‘______’.

If '+' means '÷' , '–' means '+' , '×' means '–' and '÷' means '×', then what will come in place of (?) in the given equation?

Which figure from the options will replace the question mark (?) in the following figure series?

'A + B' means 'A is brother of B'

'A – B' means 'A is mother of B'

'A × B' means 'A is husband of B'

L is the wife of Q. P is the mother of M. J is the father of L. M is the sister of H. J is the husband of H. How is P related to L?

Statements:

All flowers are trees.

All leaves are flowers.

Conclusion:

I) All trees are flowers.

If each of the letters of the word 'STADIUM' are re-arranged in the English alphabetical order, then the position of which letter will remain unchanged?

Four letter – cluster pairs have been given, out of which three are alike in some manner, and one is different. Select the one that is different.