26. A comparison of frequency division and time division multiplexing system shows that
(A) FDM requires a lower bandwidth, but TDM has greater noise immunity.
(B) FDM has greater noise immunity and requires lower bandwidth than TDM.
(C) FDM requires channel synchronization, while TDM has greater noise immunity.
(D) FDM requires more multiplex while TDM requires band pass filter.
27. If carrier modulated by a digital bit stream, has one of the possible phase of 0, 90, 180 and 270 degrees, then modulation called
(A) BPSK (B) QPSK (C) QAM (D) MSK
28. Consider the following statement :
(i) The bandwidth of the A.M., wave depends on the band width of the modulating signal.
(ii) The bandwidth of the A.M., wave depends on the modulation index.
(iii) The bandwidth of the F.M, wave for all practical purpose depends on the amplitude of the carrier.
Of these statements the correct statements are
(A) (i, ii)
(B) (i, iii)
(C) (ii, iii)
(D) All of the above
29. A smart modem can dial, hangup and answer incoming calls automatically. Can you tell who provides the appropriate instructions to the modem for this purpose ?
(A) Communication software
(B) Error detection protocols
(C) Link access procedure (LAP)
(D) Telecommunications
30. Which of the following switching techniques is most suitable for interactive traffic ?
(A) Circuit switching
(B) Message switching
(C) Packet switching
(D) All of the above
31. Object modules generated by assembler that contains unresolved external references are resolved for two or more object module by a/an
(A) Operating system
(B) Loader
(C) Linker
(D) Compiler
32. A special software that is used to create a job queue is called
(A) Drive
(B) Spooler
(C) Interpreter
(D) Linkage editor
33. Which of the following permanent database that has an entry for each terminal symbol ?
(A) Literal table
(B) Identifier table
(C) Terminal table
(D) Source table
34. In which way(s) a macroprocessor for assembly language can be implemented ?
(A) Independent two-pass processor
(B) Independent one-pass processor
(C) Expand macrocalls and substitute arguments
(D) All of the above
35. Which of the following can be accessed by transfer vector approach of linking ?
(A) External data segments
(B) External subroutine
(C) Data located in other procedure
(D) All of the above
36. Block or Buffer caches are used to
(A) improve disk performance
(B) handle interrupts
(C) increase the capacity of main memory
(D) speed up main memory Read operations
37. A file organization component VSAM file is
(A) Relative records data set
(B) Keyed sequential data set
(C) Entry sequential data set
(D) All of the above
38. A relationship between processes such that each has some part (critical section) which must not be executed while the critical section of another is being executed, is known as
(A) Semaphore
(B) Mutual exclusion
(C) Multiprogramming
(D) Message passing
39. How many states can a process be in ?
(A) 3 (B) 4 (C) 2 (D) 5
40. Which command allows you to view your file 24 lines at a time ?
(A) More (B) Cat (C) Pg (D) None of the above
41. Which one of the items listed below is not one of the software engineering layers ?
(A) Process
(B) Manufacturing
(C) Method
(D) Tools
42. What is the first stage in program development ?
(A) Specification and design
(B) System Analysis
(C) Testing
(D) None of the above
43. By means of a data flow diagram, the analyst can detect
(A) Task duplication
(B) Unnecessary delays
(C) Task overlapping
(D) All of the above
44. Which of these are the 5 generic software engineering framework activities ?
(A) Communication, planning, modelling, construction, deployment
(B) Communication, risk management, measurement, production, reviewing
(C) Analysis, designing, programming, Debugging, maintenance
(D) Analysis, planning, designing, programming, testing
45. Many causes of the software crisis can be traced to mythology based on
(A) Management Myths
(B) Customer Myths
(C) Practitioner Myths
(D) All of the above
46. Data warehousing refers to
(A) storing data offline at a separate site
(B) backing up data regularly
(C) is related to data mining
(D) uses tape as opposed to disk
47. Virtual memory is
(A) related to virtual reality
(B) a form of ROM
(C) a form of RAM
(D) None of the above
48. “M-Commerce” refers to
(A) a myth which does not exist in reality
(B) the ability of business to reach potential customers wherever they are
(C) the ability to have large capacity of memory storage dealing trade and commerce
(D) None of the above
49. The principal electronic payment systems for electronic commerce is
(A) Credit Card
(B) Digital Wallet
(C) Electronic Cheque
(D) All of the above
50. Which is the most valuable electronic commerce to the individual customer in long run ?
(A) Business to Customer
(B) Business to Business
(C) Customer to Customer
(D) None of the above