Which process check to ensure the components of the computer are operating and connected properly?

Direction: Study the following information and answer the related questions. P, Q, R, S, T, A, B, C, D and E are employees of a company. A table shows the average age of any two employees of the company. The average age of A and B is 27.5.
i.e. average age of A & P is given as (A+P)/2=39.5

If age of P and Q is decreased by 50% and age of A and B is increased by 20%, what will be the ratio of ages of P, Q, R, S and T together to the ages of A, B, C, D and E together?

Where did the concept of written constitution first take birth?

Which Article is related to "Abolition of Untouchability”?

Thomas Schaefer, who passed away recently was the finance minister of which country?

Recently, who has received DRDO's 'Scientist of the Year' award?