Embedded Real Time Operating System Set 4
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This set of Embedded Real Time Operating System Multiple Choice Questions & Answers (MCQs) focuses on Embedded Real Time Operating System Set 4
Q1 | What is the full form of ISA?
- Industry Standard Architecture
- International American Standard
- International Standard Architecture
- None of the mentioned
Q2 | The disadvantage of using a parallel mode of communication is ______
- All of the mentioned
- Leads to erroneous data transfer
- Security of data
- It is costly
Q3 | The transformation between the Parallel and serial ports is done with the help of ______
- Flip flops
- Logic circuits
- Shift registers
- None of the mentioned
Q4 | What WLAN device provides communications management services to wireless workstations?
- Access Point
- Antenna
- Network Adaptor
- Repeater
Q5 | RS-232, RS-449, RS-530, V-24, and X-21 are examples of?
- standards for various types of transmission channels.
- standards for interfaces between terminals and modems.
- two methods of error detection and correction
- standards for end-to-end performance of data communication systems.
Q6 | Many cables have “RS-232” connectors with some wires crossed or connected to each other because….
- there are various RS-232 standards.
- asynchronous modem reverses the direction of transmitted and received data from the standard.
- accept commands from the terminals Via Rs-232 interface.
- many computers and peripherals use RS-232 serial interfaces, but not as DTE-to-DCE
Q7 | Which protocol standard of serial communication specify the bi-directional and half-duplex form of data transmission by allowing various numbers of drivers and receivers in bus configuration?
- RS232
- RS2485
- RS422
- RS423
Q8 | What is the maximum device handling capacity of serial standard protocol RS485 in terms of drivers and receivers on a single line?
- 8
- 10
- 16
- 32
Q9 | The main importance of ARM micro-processors is providing operation with ______
- Low cost and low power consumption
- Higher degree of multi-tasking
- Lower error or glitches
- Efficient memory management
Q10 | The address system supported by ARM systems is/are ___________
- Little Endian
- Big Endian
- X-Little Endian
- Both Little & Big Endian
Q11 | Which of the following is the type of SPI controller?
- Queued SPI
- Microwire
- Microwire/plus
- Quad SPI
Q12 | How buffers are enabled in the parallel ports?
- by the data register
- by data direction register
- by individual control register
- by data and individual control register
Q13 | Which peripheral port provides the FASTEST throughput to laser printers?
- RS-232
- SCSI
- Parallel
- Serial
Q14 | Advantages of SPI are…..
- It\s faster than asynchronous serial.
- The receive hardware can be a simple shift register.
- It supports multiple slaves.
- All of Above
Q15 | In a safety critical system, incorrect operation ____________
- does not affect much
- causes minor problems
- causes major and serious problems
- none of the mentioned
Q16 | Antilock brake systems, flight management systems, pacemakers are examples of ____________
- a) safety critical system
- b) hard real time system
- c) soft real time system
- d) safety critical system and hard real time system
Q17 | Some of the properties of real time systems include ____________
- a) single purpose
- b) inexpensively mass produced
- c) small size
- d) all of the mentioned
Q18 | The technique in which the CPU generates physical addresses directly is known as ____________
- a) relocation register method
- b) real addressing
- c) virtual addressing
- d) none of the mentioned
Q19 | Hard real time operating system has ______________ jitter than a soft real time operating system.
- less
- more
- equal
- none of the mentioned
Q20 | In rate monotonic scheduling ____________
- a) shorter duration job has higher priority
- b) longer duration job has higher priority
- c) priority does not depend on the duration of the job
- d) none of the mentioned
Q21 | In which scheduling certain amount of CPU time is allocated to each process?
- a) earliest deadline first scheduling
- b) proportional share scheduling
- c) equal share scheduling
- d) none of the mentioned
Q22 | Time duration required for scheduling dispatcher to stop one process and start another is known as ____________
- process latency
- dispatch latency
- execution latency
- interrupt latency
Q23 | Time required to synchronous switch from the context of one thread to the context of another thread is called?
- a) threads fly-back time
- b) jitter
- c) context switch time
- d) none of the mentioned
Q24 | Which one of the following is a real time operating system?
- a) RTLinux
- b) VxWorks
- c) Windows CE
- d) All of the mentioned
Q25 | VxWorks is centered around ___________
- a) wind microkernel
- b) linux kernel
- c) unix kernel
- d) none of the mentioned