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
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
3   An Embedded system is a combination of _________
    (A)   hardware and software
    (B)   software
    (C)   hardware or software
    (D)   hardware
4   Types of memory used in embedded systems are _______
    (A)   Flash
    (B)   RAM
    (C)   External RAM
    (D)   All of above
5   Which of the following is not block of an embedded system ?
    (A)   Timer
    (B)   Processor
    (C)   Memory
    (D)   None of above
6   Application areas of embedded Systems are _________
    (A)   Consumer electronics
    (B)   Automotive industry
    (C)   Healthcare
    (D)   All of above
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
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
9   Program and data memories are separate in ______
    (A)   Harvard architecture
    (B)   Von –Neumann architecture
    (C)   Both of above
    (D)   None of above
10   Instructions and data cannot be fetched simultaneously in ____
    (A)   Harvard architecture
    (B)   Von –Neumann architecture
    (C)   Both of above
    (D)   None of above
11   RISC stands for ______
    (A)   Reduced Instruction Set Computer
    (B)   Redundant Instruction Set Computer
    (C)   Readable Instruction Set Computer
    (D)   None of above
12   PIC stands for ______
    (A)   Peripheral interrupt controller
    (B)   Peripheral interface controller
    (C)   Peripheral internal controller
    (D)   None of above
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
14   Based on performance of microcontroller embedded systems are classified as ____
    (A)   Small Scale
    (B)   Medium Scale
    (C)   Sophisticated
    (D)   All of above
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
16   Which of the following is not C data type?
    (A)   char
    (B)   int
    (C)   sbit
    (D)   None of Above
17   What is the size of C data type sbit ?
    (A)   1 bit
    (B)   8 bit
    (C)   16 bit
    (D)   None of Above
18   What is the size of C data type sfr ?
    (A)   1 bit
    (B)   8 bit
    (C)   16 bit
    (D)   None of Above
19   Bitwise left shift operator is represented using symbol____
    (A)   >> 
    (B)   << 
    (C)   &
    (D)   None of Above
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
21   Hex file size is more in Embedded C programming. Statement is ____
    (A)   True
    (B)   FALSE
    (C)   Cannot say
    (D)   None of above
22   Debugging is easy in Embedded C programming. Statement is ____
    (A)   True
    (B)   FALSE
    (C)   Cannot say
    (D)   None of above
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
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
25   For incrementing the Port P1 value _____statement is used.
    (A)   P1–
    (B)   P1++
    (C)   P1**
    (D)   None of above
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
27   External hardware interrupt 0 (INT 0) has the interrupt vector ROM location as _____
    (A)   00H
    (B)   0BH
    (C)   13H
    (D)   None of above
28   RI and TI interrupt has the interrupt vector ROM location as _____
    (A)   00H
    (B)   1BH
    (C)   23H
    (D)   None of above
29   Both stations can transmit and receive simultaneously in __________
    (A)   Half duplex mode
    (B)   Full duplex mode
    (C)   Simplex mode
    (D)   None of above
30   Start and stop bits are present in _____________
    (A)   Synchronous communication
    (B)   Asynchronous communication
    (C)   Both of above
    (D)   None of above
31   MAX 232 can communicate maximum ________
    (A)   One device
    (B)   Two devices
    (C)   Three devices
    (D)   Four devices
32   Size of internal RAM in 89C51 microcontroller is ____
    (A)   128 kbytes
    (B)   128 bytes
    (C)   4K bytes
    (D)   4 bytes
33   Parallel communication is used for __________
    (A)   short distance communication
    (B)   long distance communication
    (C)   both of above
    (D)   none of above
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
35   In MAX 232, maximum _____ devices can communicate simultaneosly.
    (A)   two
    (B)   three
    (C)   four
    (D)   none of above
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
37   SDA and SCA lines are available in ______communication protocol.
    (A)   USB
    (B)   I2C
    (C)   CAN
    (D)   None of above
38   In half step sequence of rotation of stepper motor, number of steps sequence lengh is _____.
    (A)   2
    (B)   4
    (C)   6
    (D)   8
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
40   How many pins/wires are available in USB cable?
    (A)   four pins
    (B)   two pins
    (C)   three pins
    (D)   None of above
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
42   Blutooth operates at _____ frequncy.
    (A)   2.2 GHz
    (B)   2.4 GHz
    (C)   2.0 GHz
    (D)   None of above
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
44   IrDA stands for ________
    (A)   Infrared Data Association
    (B)   Internet Data Association
    (C)   Intranet Data Association
    (D)   None of above
45   Task has deadline in _______ operating system.
    (A)   General
    (B)   RTOS
    (C)   Both of above
    (D)   None of above
46   Time response is not deterministic in _______ operating system.
    (A)   General
    (B)   RTOS
    (C)   Both of above
    (D)   None of above
47   RTOS feature scalability means able to ______ as per application.
    (A)   scale up
    (B)   scale down
    (C)   Both of above
    (D)   None of above
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
49   States of task include _______
    (A)   Ready to Run
    (B)   Waiting
    (C)   Running
    (D)   All of above
50   Resource allocation method include ____
    (A)   Resource partitioning approach
    (B)   Pool based approach
    (C)   Both of above
    (D)   None of above
51   Inter process communication method consist of ______
    (A)   Pipes
    (B)   Shared memory
    (C)   Semaphores
    (D)   All of above
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
53   Semaphore is used for ______
    (A)   Resource synchronization
    (B)   Task synchronization
    (C)   Both of above
    (D)   None of above
54   Reason for occurrence for deadlock are_______
    (A)   Hold and wait
    (B)   Mutual exclusion
    (C)   Circular Wait
    (D)   All of above

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