Question Discussion & Solution

MCQ

If deadlocks occur frequently, the detection algorithm must be invoked ________

rarely

frequently

rarely

none of the mentioned

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MCQ

A collection of instructions that performs a single logical function is called ____________

transaction

operation

function

all of the mentioned

Discussion

MCQ

An actual update is not allowed to a data item ____________

before the corresponding log record is written out to stable storage

after the corresponding log record is written out to stable storage

until the whole log record has been checked for inconsistencies

all of the mentioned

Discussion

MCQ

The dining-philosophers problem will occur in case of ____________

5 philosophers and 5 chopsticks

4 philosophers and 5 chopsticks

3 philosophers and 5 chopsticks

6 philosophers and 5 chopsticks

Discussion

MCQ

The program follows to use a shared binary semaphore T.

Process A  
int Y;            
A1: Y = X*2;      
A2: X = Y;        
signal(T);        
 
Process B
int Z;
B1: wait(T);
B2: Z = X+1;
X = Z;

T is set to 0 before either process begins execution and, as before, X is set to 5. Now, how many different values of X are possible after both processes finish executing?

one

two

three

four

Discussion

MCQ

If no process is suspended, the signal operation ____________

puts the system into a deadlock state

suspends some default process execution

nothing happens

the output is unpredictable

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Linux

MS Windows

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