18.

19.

20.

21.

At initialization, a java application needs to loads 25 libraries. Each library takes one disc
access to load. The disc seek time to a random location is specified as 20 ms. The disc rotates
at a rate of 3000 rpm. How long will it take to load all 25 libraries if they are loaded from
random locations on the disc? (The time it takes to transmit data from a disc block once the
head is positioned at the beginning of the block can be ignored.)

(^) 0.5 sec (B) 0.75 sec

(0) 1860 (D) 1.5 sec
Match the following

டு 12൦0൩൦൦൨ the output of one command into a. >

another command

Gi) Redirect output of a command into a new
file. If the file already exists, over-write 2. |

(111) Redirect the output of a command onto the 6. <
end of an existing file
(iv) Redirect a file as input to a program 0. >>
(A) 0: 0), (1:0, 61): 6, (iv) :8 (8) 0): ७), Gi): a, (iii): d, Gv) ௦
൭) 0): ©), (0:6, (iii): a, (iv): b 0) (@: ‏ہہ‎ (1): a, (iii): 9, (iv): d

For the page reference string 2, 3, 0, 1, 5, 4, 0, 1, 2, 5, 4, 3, 4, 2, 3, 5 compute the number of
page faults following a LRU page replacement policy with 3 memory frames (initially empty)
(A) 10 ‏رم‎ 12
(C) 14 0) 16

Let R (a,b,c) and 8 (d,e,f,) be two relations in which d is the foreign key of 8 that refers to the
primary key of R. Consider the following four operations on R and 5

டு Insert intoR
Gi) Insert into 5
(111) Delete from R
(iv) Delete from 5

Which of the following statements is true about the referential integrity constraint
above?

(A) None of (i), (ii), (iii) or (iv) can cause its violation
൯ ‏الثم‎ of (0), ൬, (iii), and (iv) can cause its violation
(C) Both 0) and (iv) can cause its violation

(D) Both (1) and (111) can cause its violation

098/2022 6 A