Question Discussion & Solution

The pattern is,

So, we get:

E = 1,

R = 8,

A = 7,

D = 3

Hence, 3781 is the correct answer.

Functional cohesion:

A module is said to possess functional cohesion, if different functions of the module co-operate to complete a single task.

Example of Functional cohesion

A module containing all the functions required to manage employees’ pay-roll displays functional cohesion

The correct answer is Indicator.

Key Points

• Indicators are substances that show a change in colour when brought in contact with acids and bases.
• The most common indicator used in the laboratory is Litmus.
• Litmus is extracted from lichens.

Additional Information

• A promoter is a sequence of DNA needed to turn a gene on or off.
• A neutralizer is a substance used in the neutralization of acidic water.
• Neutralization is a chemical reaction in which acid and a base react quantitatively with each other to form water and salt.
• A catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the reaction.

Six people: M, N, O, P, Q, and R.

1) Only two people sit between Q and N, who sit extreme left end of the row.

2) Q sits second to the left of R.

3) O is an immediate neighbor of R.

4) P and M are immediate neighbor to each other.

5) N is not immediate neighbor of M.

The correct answer is option 3.

Concept:

A semaphore is a variable or abstract data type used to control access to a common resource by multiple threads and avoid critical section problems in a concurrent system such as a multitasking operating system.

Explanation:

Starvation is a problem that happens when high-priority processes continue to run while low priority processes are halted indefinitely. A continual stream of higher-priority processes in a densely loaded computer system can prevent a low-priority operation from ever receiving the CPU.

Indefinite blocking or starvation is a situation in which processes wait indefinitely within the semaphore. Indefinite blocking may occur if we remove processes from the list associated with a semaphore in LIFO (last-in, first-out) order.

Hence the correct answer is starvation.

Additional InformationCritical section:

 The critical section is the section of code in which processes access and write to shared resources such as common variables and files. Because processes run continuously, any process can be interrupted in the middle of its execution.