BPSC Sub-Assistant Maintenance Engineer 2019 – Preliminary question & solution

Questions from the BPSC Sub-Assistant Maintenance Engineer recruitment exam, 2019 – Preliminary, shared by the candidates who sat it. The paper: 40 MCQs. So far 40 MCQs have been shared. Topics include Computer Basics, Computer Networks, Operating System, Coding and Digital Logic.

MCQ (40)

  1. The ordinary efficiency of a given transformer is maximum when-
    1. a) It runs at half-load
    2. b) It runs at full-load
    3. c) Its copper loss is equal to iron loss
    4. d) It runs slightly overload
  2. LTE means -
    1. a) Long Term Evaluation
    2. b) Long Time Evaluation
    3. c) Long Term Evolution
    4. d) Long Terminal Evolution
  3. Which multiplexing technique transmits digital signals?
    1. a) WDM
    2. b) FDM
    3. c) TDM
    4. d) All of the above
  4. Routing is clearly the major issue for:
    1. a) Transport layer
    2. b) Network layer
    3. c) Data-link layer
    4. d) Physical layer
  5. We use a firewall to prevent-
    1. a) Data-driven attack
    2. b) Virus attack
    3. c) Unauthorized attack
    4. d) All
  6. The unit-impulse response of a system is given by c(t)=0.5e⁻⁰·⁵ᵗ. Its transfer function is-
    1. a) 1/(s+2)
    2. b) 1/(1+2s)
    3. c) 2/(1+2s)
    4. d) 2/(s+2)
  7. The bandwidth of a channel is 1 MHz. The SNR for this channel is 63. What is the bit rate?
    1. a) 4 Mbps
    2. b) 6 Mbps
    3. c) 8 Mbps
    4. d) 10 Mbps
  8. A filter having a single continuous transmission band with neither the upper nor the lower cutoff frequency being zero or infinite is…
    1. a) Band pass filter
    2. b) Low pass filter
    3. c) High pass filter
    4. d) Band stop filter
  9. The concept of which Superposition theorem is based on-
    1. a) Reciprocity
    2. b) duality
    3. c) non-linearity
    4. d) linearity
  10. Bridge is a _____ device.
    1. a) Layer-2
    2. b) Layer-3
    3. c) Layer-1
    4. d) Layer-2 and Layer-3
  11. Some programs exist that computers use to help them manage their tasks and devices; these are called-
    1. a) Software
    2. b) Application software
    3. c) System software
    4. d) Firmware
  12. At absolute zero temperature, a semiconductor behaves as a/an-
    1. a) Good conductor
    2. b) Superconductor
    3. c) Insulator
    4. d) Variable resistor
  13. If two generators are running in parallel and field of one of the generators is weakened too much then it will-
    1. a) Take the smaller share of the total load
    2. b) Run as the motor in the same direction
    3. c) Take a large share of the total load
    4. d) Run in the opposite direction as motor
  14. The fact that the conductor carries more current on the surface of core is known as-
    1. a) Permeability
    2. b) Surface tension
    3. c) Corona
    4. d) Skin effect
  15. The technique that is used to digitize an analog signal by a codec is called-
    1. a) PCM
    2. b) Demodulation
    3. c) CDMA
    4. d) NRZ
  16. A load is connected to a network. At the terminal to which the load is connected, R_th=10 and V_th=40V. The maximum possible power…
    1. a) 160 W
    2. b) 80 W
    3. c) 40 W
    4. d) 1 W
  17. Baidu is one kind of -
    1. a) Search Engine
    2. b) Bookstore
    3. c) Payment
    4. d) Operating
  18. When you pass an array as an argument to a function, what actually gets passed?
    1. a) Base address of the array
    2. b) The first element of the array
    3. c) Address of the first element of the array
    4. d) Address of the last element of the array
  19. (B12)₁₆+(5CA)₁₆=?
    1. a) (10DC)₁₆
    2. b) (AFDC)₁₆
    3. c) (1FDC)₁₆
    4. d) (E1DC)₁₆
  20. Which class of IP address provides a maximum of only 254 host addresses per network ID?
    1. a) Class A
    2. b) Class B
    3. c) Class C
    4. d) Class D
  21. A constructor is a special type of-
    1. a) Class
    2. b) Field
    3. c) Method
    4. d) Property
  22. What is the following declaration for? int (*a) [10];
    1. a) Pointer to an array of 10 integers
    2. b) Array of 10 function pointers returning integer
    3. c) A pointer to a function returning an array of 10 integers
    4. d) Array of 10 integer pointers
  23. How long is an IPv6 address?
    1. a) 32-bits
    2. b) 128-bytes
    3. c) 64-bits
    4. d) 128-bits
  24. Which one of the following is the source of data communication?
    1. a) Modem
    2. b) Cable
    3. c) Router
    4. d) Computer
  25. Cloud computing is a _____ system and it is necessarily unidirectional in nature.
    1. a) Stateless
    2. b) Stateful
    3. c) Reliable
    4. d) Windows
  26. If the frequency spectrum of a signal has a bandwidth of 500 Hz and the highest frequency is 600 Hz, what should be the sampling rate…
    1. a) 200 samples/s
    2. b) 500 samples/s
    3. c) 1000 samples/s
    4. d) 1200 samples/s
  27. A common representation of process scheduling is -
    1. a) Static diagram
    2. b) Scheduling queues
    3. c) Queuing diagram
    4. d) Process control block
  28. The sole purpose of a commutator in a DC generator is to-
    1. a) Increase output voltage
    2. b) Reduce sparking at brushes
    3. c) Provide smoother output
    4. d) Convert the induced AC to DC
  29. What is the default level of inheritance in C++ if none is specified?
    1. a) Public
    2. b) Private
    3. c) Protected
    4. d) Compile time error
  30. MIRC Means-
    1. a) Magnetic Ink Character Reader
    2. b) Magnetic Ink Code Reader
    3. c) Magnetic Ink Case Reader
    4. d) None
  31. Which of the following cloud concept is related to pooling and sharing of resources?
    1. a) Polymorphism
    2. b) Abstraction
    3. c) Virtualization
    4. d) Digitizing
  32. Which one of the following is a private network based on public network?
    1. a) Local Area Network
    2. b) Virtual Private Network
    3. c) Storage Area Network
    4. d) Enterprise Private Network
  33. The scheduling queue is generally stored as-
    1. a) A linear array
    2. b) A stack
    3. c) A linked list
    4. d) A tree
  34. In the hypermedia database, information bits are stored in the form of:
    1. a) Cubes
    2. b) Nodes
    3. c) Signals
    4. d) Symbols
  35. What provides the interface between a process and the OS?
    1. a) Kernel
    2. b) System calls
    3. c) Command
    4. d) Graphical user
  36. To execute a program, an OS creates a number of _______, each one for, running a different program.
    1. a) Processors
    2. b) Threads
    3. c) Virtual processors
    4. d) Kernel
  37. The process of laying out a document with text, graphics, headlines and photographs is involved in:
    1. a) Deck Top Printing
    2. b) Desk Top Printing
    3. c) Desk Top Publishing
    4. d) Deck Top Publishing
  38. The request and release of resources are-
    1. a) Command line
    2. b) Interrupt statements
    3. c) System calls
    4. d) Special program
  39. What is the largest decimal value that can be represented by 12 bits?
    1. a) 1024
    2. b) 2048
    3. c) 2095
    4. d) 4095
  40. Information, a combination of graphics, text, sound, video and animation is called-
    1. a) Multitask
    2. b) Multimedia
    3. c) Multiprocessor
    4. d) Multiprogramming

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