What is the purpose of the count() method for lists and tuples?

Consider the following code. int count = 0; void *thfun () { int ctr=0; for (ctr=0; ctr<100; ctr++) count++; } If thfun is executed by two threads concurrently in a uniprocessor system, what will be the MINIMUM value of count when both threads complete their execution? Assume that count++ is performed using three instructions: (i) read value of count from memory to a CPU register R, (ii) increment R, and (iii) store the value of R in memory.

A

200

B

100

C

2

D

None of the above

Consider two database relations R and S having 3 tuples in R and 2 tuples in S. what is the maximum number of tuples that could appear in the natural join of R and S?

A

2

B

5

C

3

D

6

Which one of the following provides the ability to query information from the database and to insert tuples into, delete tuples from, and modify tuples in the database?

A

DML(Data Manipulation Langauge)

B

DDL(Data Definition Langauge)

C

Query

D

Relational Schema

Which of the following statements are true? i) practical application of XOR linked lists are in environments with limited space requirements, such as embedded devices. ii)xor lists are not suitable because most garbage collectors will fail to work properly with classes or structures that don’t contain literal pointers iii)in order to calculate the address of the next node you need to remember the address of the previous node iv)xor lists are much efficient than single, doubly linked lists and arrays

A

i, ii, iii, iv

B

i, ii, iii

C

i, ii

D

i

Each of a set of n processes executes the following code using two semaphores a and b initialized to 1 and 0, respectively. Assume that count is a shared variable initialized to 0 and not used in CODE SECTION P. CODE SECTION P wait (a); count=count+1 ; if (count==n) signal (b) ; signal (a) ; wait (b) ; signal (b) ; CODE SECTION Q What does the code achieve?

A

It ensures that no process executes CODE SECTION Q before every process has finished CODE SECTION P.

B

It ensures that at most two processes are in CODE SECTION Q at any time.

C

It ensures that all processes execute CODE SECTION P mutually exclusively.

D

It ensures that at most n-1 processes are in CODE SECTION P at any time.

Quantity I: Mc Donald farm has only Emus and Lions, the total count of legs was 14 less than 4 times the total count of heads. How many legs are counted in total? Quantity II: Mc Donald Farm has only Emus and Lions, the total count of legs was 15 less than 5 times the total count of the head. How many legs are counted in total?

A

Quantity II > Quantity I

B

Quantity I > Quantity II

C

Quantity II ≥ Quantity I

D

Quantity I = Quantity II or No Relation

E

Quantity II ≤ Quantity I

Consider the following code snippet : var c = counter(), d = counter(); c.count() d.count() c.reset() c.count() d.count() The state stored in d is :

A

1

B

0

C

Null

D

Undefined

What is the purpose of the remove() method for lists and tuples?

A

Removes the specified element

B

Adds an element to the list or tuple

C

Replaces an element in the list or tuple

D

Deletes the list or tuple

What is the purpose of the clear() method for lists and tuples?

A

Removes all elements from the list or tuple

B

Adds an element to the list or tuple

C

Removes the last element

D

Deletes the list or tuple

What is the purpose of the reverse() method for lists and tuples?

A

Reverses the order of elements in the list or tuple

B

Removes the last element

C

Deletes the list or tuple

D

Adds an element to the list or tuple

What is the purpose of the count() method for lists and tuples?

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