Embedded And Real Time System Set 4

Electrical Engineering

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This set of Embedded and Real Time System Multiple Choice Questions & Answers (MCQs) focuses on Embedded And Real Time System Set 4

Q1 | What is the processor used by ARM7?
  • 8-bit cisc
  • 8-bit risc
  • 32-bit cisc
  • 32-bit risc
Answer: 32-bit risc
Explaination:
arm7 is a group 32-bit risc arm processor cores licensed by arm holdings for microcontroller use.
Q2 | What is the instruction set used by ARM7?
  • 16-bit instruction set
  • 32-bit instruction set
  • 64-bit instruction set
  • 8-bit instruction set
Answer: 16-bit instruction set
Explaination:
arm introduced the thumb 16-bit instruction set providing improved code density compared to previous designs. the most widely used arm7 designs implement the armv4t architecture, but some implement arm3 or armv5tej.
Q3 | ARM7 has an in-built debugging device?
  • true
  • false
Answer: true
Explaination:
some arm7 cores are obsolete. it had a jtag based on-chip debugging; the preceding arm6 cores did not support it. the “d” represented a jtag tap for debugging.
Q4 | What is the capability of ARM7 f instruction for a second?
  • 110 mips
  • 150 mips
  • 125 mips
  • 130 mips
Answer: 130 mips
Explaination:
it is a versatile device for mobile devices and other low power electronics. this processor architecture is capable of up to 130mips on a typical 0.13 um process.
Q5 | We have no use of having silicon customization?
  • true
  • false
Answer: false
Explaination:
it achieve custom design goals, such as higher clock speed, very low power consumption, instruction set extension, optimization for size, debug support, etc.
Q6 | Which of the following has the same instruction set as ARM7?
  • arm6
  • armv3
  • arm71a0
  • armv4t
Answer: armv3
Explaination:
the original arm7 was based on the earlier arm6 design and used the same arm3 instruction set.
Q7 | What are t, d, m, I stands for in ARM7TDMI?
  • timer, debug, multiplex, ice
  • thumb, debug, multiplier, ice
  • timer, debug, modulation, is
  • thumb, debug, multiplier, ice
Answer: thumb, debug, multiplier, ice
Answer: thumb, debug, multiplier, ice
Explaination:
the arm7tdmi(arm7 + 16 bit thumb + jtag debug + fast multiplier + enhanced ice) processor implements the arm4 instruction set.
Q8 | ARM stands for                    
  • advanced risc machine
  • advanced risc methadology
  • advanced reduced machine
  • advanced reduced methadology
Answer: advanced risc machine
Explaination:
arm, originally acorn risc machine, later advanced risc machine, is a family of reduced instruction set computing (risc) architectures for computing processors.
Q9 | What are the profiles for ARM architecture?
  • a,r
  • a,m
  • a,r,m
  • r,m
Answer: a,r,m
Explaination:
armv7 defines 3 architecture “profiles”:
Q10 | ARM7DI operates in which mode?
  • big endian
  • little endian
  • both big and little endian
  • neither big nor little endian
Answer: both big and little endian
Explaination:
big endian configuration, when bigend signal is high the processor treats bytes in memory as being in big endian format. when it is low memory is treated as little endian.
Q11 | In which of the following ARM processors virtual memory is present?
  • arm7di
  • arm7tdmi-s
  • arm7tdmi
  • arm7ej-s
Answer: arm7di
Explaination:
arm7di is capable of running a virtual memory system. the abort input to the processor may be used by the memory
Q12 | How many instructions pipelining is used in ARM7EJ-S?
  • 3-stage
  • 4-stage
  • 5-stage d)2-stage
Answer: 5-stage d)2-stage
Explaination:
a five-stage pipelining is used, consisting of fetch, decode, execute, memory, and writeback stages. a six-stage pipelining is used in jazelle state, consisting of fetch, jazelle, execute, memory, and
Q13 | How many bit data bus is used in ARM7EJ-s?
  • 32-bit
  • 16-bit
  • 8-bit
  • both 16 and 32 bit
Answer: 32-bit
Explaination:
the arm7ej-s processor has a von neumann architecture. this feature is a single 32-bit data bus that carries both instructions and data. only load, store, and swap instructions can access data from memory. data can be 8- bit.
Q14 | What is the cache memory for ARM710T?
  • 12kb
  • 16kb
  • 32kb
  • 8kb
Answer: 8kb
Explaination:
the arm710t is a general purpose 32-bit microprocessor with 8kb cache, enlarged write buffer and memory management unit combined in a single chip.
Q15 | Which of the following are header files?
  • #include
  • file
  • struct()
  • proc()
Answer: #include
Explaination:
the #include is a header file which defines the standard constants, variable
Q16 | Which is the standard C compiler used for the UNIX systems?
  • simulator
  • compiler
  • cc
  • sc
Answer: cc
Explaination:
the cc is the standard c compiler used in the unix system. its command lines can be pre-processed, compiled, assembled and linked to create an executable file.
Q17 | Which compiling option is used to compile programs to form part of a library?
  • -c
  • -p
  • -f
  • -g
Answer: -c
Explaination:
there are several options for the compilers. the option -c compiles the linking stage and then leaves the object file. this option is used to compile programs to form a part of the library.
Q18 | Which compiling option can be used for finding which part of the program is consuming most of the processing time?
  • -f
  • -g
  • -p
  • -c
Answer: -p
Explaination:
the -p instructs the compiler to produce codes which count the number of times each routine is called and this is useful for finding the processing time of the programs.
Q19 | Which compiling option can generate symbolic debug information for debuggers?
  • -c
  • -p
  • -f
  • -g
Answer: -g
Explaination:
the -g generates the symbolic debug information for the debuggers. without this, the debugger cannot print the variable values, it can only work at the assembler level. the symbolic information is passed through the compilation process and stored in the executable file.
Q20 | Which of the following is also known as loader?
  • locater
  • linker
  • assembler
  • compiler
Answer: linker
Explaination:
the linker is also known as a loader. it can take the object file and searches the library files to find the routine it calls.
Q21 | Which of the following gives the final control to the programmer?
  • linker
  • compiler
  • locater
  • simulator
Answer: linker
Explaination:
the linker can give the final control to the programmer concerning how unresolved references are reconciled, where the sections are located in the memory, which routines are used, and so on.
Q22 | Which command takes the object file and searches library files to find the routine calls?
  • simulator
  • emulator
  • debugger
  • linker
Answer: linker
Explaination:
the linker is also known as a loader. it can take the object file and searches the library files to find the routine it calls. the linker can give the final control to the programmer concerning how unresolved references are reconciled, where the sections are located in the memory, which routines are used, and so on.
Q23 | Which assembler option is used to turn off long or short address optimization?
  • -n
  • -v
  • -m
  • -o
Answer: -n
Explaination:
the option -o puts the assembler into the file obj file, -v can write the assembler’s version number on the standard error output, -m runs the macro preprocessor on the source file and -n turns off the long or short address optimization.
Q24 | Which assembler option runs the m4 macro preprocessor on the source file?
  • -n
  • -m
  • -v
  • -o
Answer: -m
Explaination:
the option -o puts the assembler into the file obj file, -v can write the assembler’s version number on the standard error output, -m runs the macro preprocessor on the source file and -n turns off the long or short address optimization.
Q25 | Major portion of web page contributes
  • image
  • text
  • video
  • audio
Answer: image
Explaination:
64% of any website’s page is made up of images. the loading speed of the websites also slows down due to this much contribution of images in a web page. to reduce this loading time we use web performance optimization.
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