Paper 2 CS · UNIT 05 · MOCK TEST

Mock 15 – Mixed Practice

Unit 5: System Software and Operating System · 24 questions · about 28 minutes. Press End Mock any time to see your score and the correct answers.

All 15 topic-wise mocks in this unit

0 / 24 answered 00:00

Q1.

Suppose there are six files F1, F2, F3, F4, F5, F6 with corresponding sizes 150 KB, 225 KB, 75 KB, 60 KB, 275 KB and 65 KB respectively. The files are to be stored on a sequential device in such a way that optimizes (average) access time. In what order should the files be stored?

A(A) F5, F2, F1, F3, F6, F4 B(B) F4, F6, F3, F1, F2, F5 C(C) F1, F2, F3, F4, F5, F6 D(D) F6, F5, F4, F3, F2, F1

Q2.

A program that is used by other routines to accomplish a particular task is called:

A(A) Micro program B(B) Micro operation C(C) Routine D(D) Subroutine

Q3.

The following table shows the time between failures (in hours) observed for a piece of software:

Error number	1	2	3	4	5
Time since last failure (hours)	6	4	8	5	6

Assuming an exponential reliability model, what is the reliability of the system for one hour of operation?

A(A) e^(-9/29) B(B) e^(-7/29) C(C) e^(-5/29) D(D) e^(-3/29)

Q4.

Consider the following statements about a software product line system:
Statement I: At the interaction level, components provide an operator display interface and an interface with the communication system used.
Statement II: At the I/O management level, components handle operator authentication, report generator and query manager.

A(A) Both Statement I and Statement II are correct B(B) Both Statement I and Statement II are incorrect C(C) Statement I is correct but Statement II is incorrect D(D) Statement I is incorrect but Statement II is correct

Q5.

A null remote procedure call (RPC) (carrying 0 data bytes) takes 1.0 msec, with an additional 1.5 msec for every 1K of data carried. How long does it take to read 32K from a file server, issued as 32 separate 1K RPCs?

A(A) 49 msec B(B) 80 msec C(C) 48 msec D(D) 100 msec

Q6. Match List - I with List - II.

List - I	List - II
A. Latency	I. number of tasks completed in a given time period
B. Delay	II. causes the current activity to be deferred
C. Throughput	III. time elapsed before next activity starts
D. Interrupt	IV. time to complete a single task

Choose the correct answer from the options given below:

AA-I, B-III, C-II, D-IV BA-III, B-IV, C-I, D-II CA-IV, B-II, C-III, D-I DA-IV, B-III, C-I, D-II

Q7. Test suite is consist of:

ASet of defect cases BSet of boundary cases CSet of test cases DSet of nest cases

Q8. Match List I with List II.
List I
(A) Scenario testing
(B) Regression testing
(C) Component testing
(D) Beta testing
List II
(I) To verify the I/O behavior of test object
(II) User acceptance methodology
(III) No new bugs after changes in program
(IV) The documentation of a use case

A(A)-(IV), (B)-(III), (C)-(II), (D)-(I) B(A)-(II), (B)-(I), (C)-(III), (D)-(IV) C(A)-(IV), (B)-(III), (C)-(I), (D)-(II) D(A)-(III), (B)-(I), (C)-(IV), (D)-(II)

Q9. For a function of two variable, boundary value analysis yields.

A4n + 3 test cases B4n + 1 test cases Cn + 4 test cases D2n + 4 test cases

Q10. Fault-based testing technique is

AUnit testing BBeta testing CStress testing DMutation testing

Q11. Which of the following is/are behavioral testing technique(s)?
(A) Equivalence Partitioning
(B) Graph-Based Testing Method
(C) Boundary Value Analysis
(D) Data flow Testing
(E) Loop Testing
Choose the correct answer from the options given below:

A(B) and (D) only B(A), (B) and (C) only C(D) and (E) only D(A), (C) and (E) only

Q12. Software validation mainly checks for inconsistencies between:

AUse cases and user requirements BImplementation and system design blueprints CDetailed specifications and user requirements DFunction specifications and use cases

Q13. In the context of software testing, which of the following statements is/are NOT correct?
P: A minimal test set that achieves 100% path coverage will also achieve 100% statement coverage.
Q: A minimal test set that achieves 100% path coverage will generally detect more faults than one that achieves 100% statement coverage.
R: A minimal test set that achieves 100% statement coverage will generally detect more faults than one that achieves 100% branch coverage.
Choose the correct answer from the options given below:

AR only BQ only CP and Q only DQ and R only

Q14. Consider the method mcq():

int mcq(boolean a, boolean b, boolean c, boolean d)
{
  int ans = 1;
  if (a) { ans = 2; }
  else if (b) { ans = 3; }
  else if (c) { if (d) { ans = 4; } }
  return ans;
}

Let M1 = number of tests to exhaustively test mcq(), M2 = minimum number of tests to achieve full statement coverage, and M3 = minimum number of tests to achieve full branch coverage. Then the value of (M1, M2, M3) is:

A(16, 3, 5) B(8, 3, 5) C(16, 4, 5) D(8, 4, 5)

Q15. What is the normal order of activities in which traditional software testing is organised?
1. Integration Testing
2. System Testing
3. Unit Testing
4. Validation Testing

A3, 1, 2, 4 B3, 1, 4, 2 C4, 3, 2, 1 D2, 4, 1, 3

Q16. Which of the following testing techniques ensures that the software product runs correctly after the changes during maintenance?

APath Testing BIntegration Testing CUnit Testing DRegression Testing

Q17. Which of the following statement(s) is/are TRUE with regard to software testing?
I. Regression testing technique ensures that the software product runs correctly after the changes during maintenance.
II. Equivalence partitioning is a white-box testing technique that divides the input domain of a program into classes of data from which test cases can be derived.

Aonly I Bonly II Cboth I and II Dneither I nor II

Q18. For a program of k variables, boundary value analysis yields ______ test cases.

A4k – 1 B4k C4k + 1 D2k – 1

Q19. The cyclomatic complexity of a flow graph V(G), in terms of predicate nodes, is: [where P is the number of predicate nodes in the flow graph V(G)]

AP + 1 BP – 1 CP – 2 DP + 2

Q20. In software testing, how are error, fault and failure related to each other?

AError leads to failure but fault is not related to error and failure BFault leads to failure but error is not related to fault and failure CError leads to fault and fault leads to failure DFault leads to error and error leads to failure

Q21. Verification:
(A) refers to the set of activities that ensure that software correctly implements a specific function
(B) gives answer to the question – Are we building the product right?
(C) requires execution of software

Arefers to the set of activities that ensure that software correctly implements a specific function Bgives answer to the question – Are we building the product right? Crequires execution of software DBoth (A) and (B)

Q22. In which testing strategy are the requirements established during requirements analysis validated against the developed software?

AValidation testing BIntegration testing CRegression testing DSystem testing

Directions (Q91–95): A program computes the average of each column of a table T with 17 rows and 1024 columns:
for j = 0 … 1023 {
temp = 0;
for i = 0 … 16
temp = temp + T[i][j];
print(temp / 17.0);
}
T[i][j] and temp are 32-bit floating-point values, memory is word addressable, and temp is kept in a register. Main memory is paged and holds 16 pages of 1024 words; page replacement is LRU. Unless stated otherwise, T is stored in row-major order.

Q23.

What is fault ratio of row major to column major arrangements ?

A1024: 1 B1301: 1 C1240: 1 D9107: 8

Directions (Q76–80): A machine has 16 GB main memory and a 32-bit virtual address space with 4 KB pages. Frame size equals page size.

Q24.

What is the minimum number of bits needed for the physical address?

A28 B34 C24 D12