Embedded Systems (ESY)

Multiple Choice Questions

1   Size of internal RAM in 89C51 microcontroller is ____
    (A)   128 kbytes
    (B)   128 bytes
    (C)   4K bytes
    (D)   4 bytes
[showhide type=”button7c1″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B  [/showhide]
2   Which is not 89C51 microcontroller feature?
    (A)   8 bit data bus
    (B)   16 bit address bus
    (C)   4K bytes ROM
    (D)   4K bytes RAM
[showhide type=”button7c2″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
3   An Embedded system is a combination of _________
    (A)   hardware and software
    (B)   software
    (C)   hardware or software
    (D)   hardware
[showhide type=”button7c3″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
4   Types of memory used in embedded systems are _______
    (A)   Flash
    (B)   RAM
    (C)   External RAM
    (D)   All of above
[showhide type=”button7c4″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
5   Which of the following is not block of an embedded system ?
    (A)   Timer
    (B)   Processor
    (C)   Memory
    (D)   None of above
[showhide type=”button7c5″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
6   Application areas of embedded Systems are _________
    (A)   Consumer electronics
    (B)   Automotive industry
    (C)   Healthcare
    (D)   All of above
[showhide type=”button7c6″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
7   Which of the following is not advantage of embedded System?
    (A)   less complicated design
    (B)   efficiently perform their function
    (C)   involve the redundant programming
    (D)   none of above
[showhide type=”button7c7″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
8   Which of the following is not disadvantage of embedded System?
    (A)   easy to change configuration
    (B)   scalability problem
    (C)   limitation of hardware
    (D)   none of above
[showhide type=”button7c8″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
9   Program and data memories are separate in ______
    (A)   Harvard architecture
    (B)   Von –Neumann architecture
    (C)   Both of above
    (D)   None of above
[showhide type=”button7c9″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
10   Instructions and data cannot be fetched simultaneously in ____
    (A)   Harvard architecture
    (B)   Von –Neumann architecture
    (C)   Both of above
    (D)   None of above
[showhide type=”button7c10″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
11   RISC stands for ______
    (A)   Reduced Instruction Set Computer
    (B)   Redundant Instruction Set Computer
    (C)   Readable Instruction Set Computer
    (D)   None of above
[showhide type=”button7c11″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
12   PIC stands for ______
    (A)   Peripheral interrupt controller
    (B)   Peripheral interface controller
    (C)   Peripheral internal controller
    (D)   None of above
[showhide type=”button7c12″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
13   Which of the following is the design metrics of embedded systems?
    (A)   Power consumption
    (B)   Expected life-time
    (C)   Time to prototype
    (D)   All of above
[showhide type=”button7c13″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
14   Based on performance of microcontroller embedded systems are classified as ____
    (A)   Small Scale
    (B)   Medium Scale
    (C)   Sophisticated
    (D)   All of above
[showhide type=”button7c14″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
15   Missing of deadline will lead to a great damage in ____ embedded systems.
    (A)   Hard Real Time
    (B)   Soft Real Time
    (C)   Both of above
    (D)   None of above
[showhide type=”button7c15″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
16   Which of the following is not C data type?
    (A)   char
    (B)   int
    (C)   sbit
    (D)   None of Above
[showhide type=”button7c16″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
17   What is the size of C data type sbit ?
    (A)   1 bit
    (B)   8 bit
    (C)   16 bit
    (D)   None of Above
[showhide type=”button7c17″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
18   What is the size of C data type sfr ?
    (A)   1 bit
    (B)   8 bit
    (C)   16 bit
    (D)   None of Above
[showhide type=”button7c18″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
19   Bitwise left shift operator is represented using symbol____
    (A)   >> 
    (B)   << 
    (C)   &
    (D)   None of Above
[showhide type=”button7c19″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
20   Which of the following is the example of Hex (Hexadecimal) data in C Programming?
    (A)   0 x 55
    (B)   55
    (C)   55 H
    (D)   None of Above
[showhide type=”button7c20″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
21   Hex file size is more in Embedded C programming. Statement is ____
    (A)   True
    (B)   FALSE
    (C)   Cannot say
    (D)   None of above
[showhide type=”button7c21″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
22   Debugging is easy in Embedded C programming. Statement is ____
    (A)   True
    (B)   FALSE
    (C)   Cannot say
    (D)   None of above
[showhide type=”button7c22″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
23   Which statement/s are used in embedded C programming for continuous looping operation?
    (A)   for ( ; ; )
    (B)   while (1)
    (C)   both of above
    (D)   none of above
[showhide type=”button7c23″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
24   unsigned char is embedded C data type which usually takes the range from _________
    (A)   0 to 255
    (B)   -128 to +127
    (C)   0 to 65535
    (D)   None of above
[showhide type=”button7c24″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
25   For incrementing the Port P1 value _____statement is used.
    (A)   P1–
    (B)   P1++
    (C)   P1**
    (D)   None of above
[showhide type=”button7c25″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
26   MAX 232 ________
    (A)   Convert RS232 voltage levels to TTL voltage levels
    (B)   Convert TTL voltage levels to RS232 voltage levels
    (C)   Act as line driver
    (D)   All of above
[showhide type=”button7c26″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
27   External hardware interrupt 0 (INT 0) has the interrupt vector ROM location as _____
    (A)   00H
    (B)   0BH
    (C)   13H
    (D)   None of above
[showhide type=”button7c27″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
28   RI and TI interrupt has the interrupt vector ROM location as _____
    (A)   00H
    (B)   1BH
    (C)   23H
    (D)   None of above
[showhide type=”button7c28″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
29   Both stations can transmit and receive simultaneously in __________
    (A)   Half duplex mode
    (B)   Full duplex mode
    (C)   Simplex mode
    (D)   None of above
[showhide type=”button7c29″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
30   Start and stop bits are present in _____________
    (A)   Synchronous communication
    (B)   Asynchronous communication
    (C)   Both of above
    (D)   None of above
[showhide type=”button7c30″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
31   MAX 232 can communicate maximum ________
    (A)   One device
    (B)   Two devices
    (C)   Three devices
    (D)   Four devices
[showhide type=”button8c1″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
32   Size of internal RAM in 89C51 microcontroller is ____
    (A)   128 kbytes
    (B)   128 bytes
    (C)   4K bytes
    (D)   4 bytes
[showhide type=”button8c2″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
33   Parallel communication is used for __________
    (A)   short distance communication
    (B)   long distance communication
    (C)   both of above
    (D)   none of above
[showhide type=”button8c3″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
34   In RS 232, 1 bit (logic 1 ) is represented by _______
    (A)   -3 to -25 V
    (B)   +3 to +25 V
    (C)   can’t say
    (D)   none of above
[showhide type=”button8c4″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
35   In MAX 232, maximum _____ devices can communicate simultaneosly.
    (A)   two
    (B)   three
    (C)   four
    (D)   none of above
[showhide type=”button8c5″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
36   LEDs can be interfaced to 8051 by which of following methods/fashion?
    (A)   Common anode
    (B)   Common cathode
    (C)   Both of above
    (D)   None of above
[showhide type=”button8c6″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
37   SDA and SCA lines are available in ______communication protocol.
    (A)   USB
    (B)   I2C
    (C)   CAN
    (D)   None of above
[showhide type=”button8c7″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
38   In half step sequence of rotation of stepper motor, number of steps sequence lengh is _____.
    (A)   2
    (B)   4
    (C)   6
    (D)   8
[showhide type=”button8c8″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
39   Applications for CAN bus is/are __________
    (A)   Power windows,doors adjustment in cars
    (B)   Electric power steering
    (C)   Engine control units
    (D)   All of above
[showhide type=”button8c9″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
40   How many pins/wires are available in USB cable?
    (A)   four pins
    (B)   two pins
    (C)   three pins
    (D)   None of above
[showhide type=”button8c10″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
41   Number of steps required to complete one revolution (360 degree) in Stepper motor are calculated as?
    (A)   360 degree / step angle
    (B)   360 degree x step angle
    (C)   step angle / 360 degree
    (D)   None of above
[showhide type=”button8c11″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
42   Blutooth operates at _____ frequncy.
    (A)   2.2 GHz
    (B)   2.4 GHz
    (C)   2.0 GHz
    (D)   None of above
[showhide type=”button8c12″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
43   Zigbee based on IEEE ________ standard.
    (A)   IEEE 802.15.1
    (B)   IEEE 802.15.4
    (C)   IEEE 802.15.2
    (D)   None of above
[showhide type=”button8c13″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
44   IrDA stands for ________
    (A)   Infrared Data Association
    (B)   Internet Data Association
    (C)   Intranet Data Association
    (D)   None of above
[showhide type=”button8c14″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
45   Task has deadline in _______ operating system.
    (A)   General
    (B)   RTOS
    (C)   Both of above
    (D)   None of above
[showhide type=”button8c15″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
46   Time response is not deterministic in _______ operating system.
    (A)   General
    (B)   RTOS
    (C)   Both of above
    (D)   None of above
[showhide type=”button8c16″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
47   RTOS feature scalability means able to ______ as per application.
    (A)   scale up
    (B)   scale down
    (C)   Both of above
    (D)   None of above
[showhide type=”button8c17″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
48   RTOS feature _______ means available all time and normally does not fail to perform any function or operation.
    (A)   Predictability
    (B)   Reliable
    (C)   Compactness
    (D)   None of above
[showhide type=”button8c18″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
49   States of task include _______
    (A)   Ready to Run
    (B)   Waiting
    (C)   Running
    (D)   All of above
[showhide type=”button8c19″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
50   Resource allocation method include ____
    (A)   Resource partitioning approach
    (B)   Pool based approach
    (C)   Both of above
    (D)   None of above
[showhide type=”button8c20″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
51   Inter process communication method consist of ______
    (A)   Pipes
    (B)   Shared memory
    (C)   Semaphores
    (D)   All of above
[showhide type=”button8c21″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
52   Watchdog timer is used to ___________
    (A)   detect a fault on embedded device
    (B)   reset the processor to take corrective action
    (C)   both of above
    (D)   None of above
[showhide type=”button8c22″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
53   Semaphore is used for ______
    (A)   Resource synchronization
    (B)   Task synchronization
    (C)   Both of above
    (D)   None of above
[showhide type=”button8c23″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
54   Reason for occurrence for deadlock are_______
    (A)   Hold and wait
    (B)   Mutual exclusion
    (C)   Circular Wait
    (D)   All of above
[showhide type=”button8c24″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]

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