- What is true about UML stereotypes ?
(A) Stereotype is used for extending the UML language.
(B) Stereotyped class must be abstract
(C) The stereotype indicates that the UML element cannot be changed
(D) UML profiles can be stereotyped for backward compatibility
Answer: A
- Which method is called first by an applet program ?
(A) start( ) (B) run( )
(C) init( ) (D) begin( )
Answer: C
- Which one of the following is not a source code metric ?
(A) Halstead metric (B) Function point metric
(C) Complexity metric (D) Length metric
Answer: B
- To compute function points (FP), the following relationship is used
FP = Count – total × (0.65 + 0.01 × S (Fi)) where Fi (i = 1 to n) are value adjustment factors (VAF) based on n questions. The value of n is
(A) 12 (B) 14
(C) 16 (D) 18
Answer: B
- Assume that the software team defines a project risk with 80% probability of occurrence of risk in the following manner :
Only 70 percent of the software components scheduled for reuse will be integrated into the application and the remaining functionality will have to be custom developed. If 60 reusable components were planned with average component size as 100 LOC and software engineering cost for each LOC as $ 14, then the risk exposure would be
(A) $ 25,200 (B) $ 20,160
(C) $ 17,640 (D) $ 15,120
Answer: B
Total resusable components planned=60.
Custom developed =.3*60=18.
Total cost in development=18*100*14.
Risk exposure= .8*18*1400.=$20160
- Maximum possible value of reliability is
(A) 100 (B) 10
(C) 1 (D) 0
Answer: C
- ‘FAN IN’ of a component A is defined as
(A) Count of the number of components that can call, or pass control, to a component A
(B) Number of components related to component A
(C) Number of components dependent on component A
(D) None of the above
Answer: A
- Temporal cohesion means
(A) Coincidental cohesion
(B) Cohesion between temporary variables
(C) Cohesion between local variables
(D) Cohesion with respect to time
Answer: D
- Various storage devices used by an operating system can be arranged as follows in increasing order of accessing speed :
(A) Magnetic tapes ® magnetic disks ® optical disks ® electronic disks ® main memory ® cache® registers
(B) Magnetic tapes ® magnetic disks ® electronic disks ® optical disks ® main memory ® cache® registers
(C) Magnetic tapes ® electronic disks ® magnetic disks ® optical disks ® main memory ® cache® registers
(D) Magnetic tapes ® optical disks ® magnetic disks ® electronic disks ® main memory ® cache® registers
Answer: D
- How many disk blocks are required to keep list of free disk blocks in a 16 GB hard disk with 1 kB block size using linked list of free disk blocks ? Assume that the disk block number is stored in 32 bits.
(A) 1024 blocks (B) 16794 blocks
(C) 20000 blocks (D) 1048576 blocks
Answer: Marks given to all
- Consider an imaginary disk with 40 cylinders. A request come to read a block on cylinder 11. While the seek to cylinder 11 is in progress, new requests come in for cylinders 1, 36, 16, 34, 9 and 12 in that order. The number of arm motions using shortest seek first algorithm is
(A) 111 (B) 112
(C) 60 (D) 61
Answer: D
Explanation.
11->12->9->16->1->34->36.=1+3+7+15+33+2=61.
- An operating system has 13 tape drives. There are three processes P1, P2 & P3. Maximum requirement of P1 is 11 tape drives, P2 is 5 tape drives and P3 is 8 tape drives. Currently, P1 is allocated 6 tape drives, P2 is allocated 3 tape drives and P3 is allocated 2 tape drives. Which of the following sequences represent a safe state ?
(A) P2 P1 P3 (B) P2 P3 P1
(C) P1 P2 P3 (D) P1 P3 P2
Answer: A
Explanation.
| Allocated | max demand | max demand-allocation | ||||||
| P1 | p2 | p3 | p1 | p2 | p3 | p1 | p2 | p3 |
| 6 | 3 | 2 | 11 | 5 | 8 | 5 | 2 | 6 |
Total tapes 13. Allocated 11. Balance 2.
So first 2 units are given to p2. Then after completion p2 returns all 5.
Now 5 units are catered to p1. Now p1 returns 11 units.
Which can easily be given to p3.
Hence order is p2,p1,p3.
- Monitor is an Interprocess Communication (IPC) technique which can be described as
(A) It is higher level synchronization primitive and is a collection of procedures, variables, and data structures grouped together in a special package.
(B) It is a non-negative integer which apart from initialization can be acted upon by wait and signal operations.
(C) It uses two primitives, send and receive which are system calls rather than language constructs.
(D) It consists of the IPC primitives implemented as system calls to block the process when they are not allowed to enter critical region to save CPU time.
Answer: A
- In a distributed computing environment, distributed shared memory is used which is
(A) Logical combination of virtual memories on the nodes.
(B) Logical combination of physical memories on the nodes.
(C) Logical combination of the secondary memories on all the nodes.
(D) All of the above
Answer: B
- Equivalent logical expression for the Well Formed Formula (WFF),
~(“x) F[x]
is
(A) “x (~F[x]) (B) ~($x) F[x]
(C) $x (~F[x]) (D) “x F[x]
Answer: C
- An A* algorithm is a heuristic search technique which
(A) is like a depth-first search where most promising child is selected for expansion
(B) generates all successor nodes and computes an estimate of distance (cost) from start node to a goal node through each of the successors. It then chooses the successor with shortest cost.
(C) saves all path lengths (costs) from start node to all generated nodes and chooses shortest path for further expansion.
(D) none of the above
Answer: B
- The resolvent of the set of clauses
(A Ú B, ~A Ú D, C Ú ~B) is
(A) A Ú B (B) C Ú D
(C) A Ú C (D) A Ú D
Answer: B
- Match the following : I. Script i. Directed graph with labelled nodes for graphical representation of knowledge II. Conceptual Dependencies ii. Knowledge about objects and events is stored in record-like structures consisting of slots and slot values. III. Frames iii. Primitive concepts and rules to represent naturaL language statements IV. Associative Network iv. Frame like structures used to represent stereotypical patterns for commonly occurring events in terms of actors, roles, props and scenes
Codes :
a b c d
(A) iv ii i iii
(B) iv iii ii i
(C) ii iii iv i
(D) i iii iv ii
Answer: B
- Match the following components of an expert system :
a. I/O interface i. Accepts user’s queries and responds to question through I/O interface b. Explanation module ii. Contains facts and rules about the domain c. Inference engine iii. Gives the user the ability to follow inferencing steps at any time during consultation d. Knowledge base iv. Permits the user to communicate with the system in a natural way
Codes :
a b c d
(A) i iii iv ii
(B) iv iii i ii
(C) i iii ii iv
(D) iv i iii ii
Answer: B
- A computer based information system is needed
(i)as it is difficult for administrative staff to process data.
(ii)due to rapid growth of information and communication technology.
III. due to growing size of organizations which need to process large volume of data.
- as timely and accurate decisions are to be taken.
Which of the above statement(s) is/are true ?
(A) I and II
(B) III and IV
(C) II and III
(D) II and IV
Answer: B