Top 10 Interview Questions in Embedded System with Answers | PTInstitute

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• One of the Best Embedded Training Institute in
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Top 10 Interview Questions in Embedded System
with Answers
By Embedded Training Institute in Bangalore
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The problem

• Company

• Context

• Problem statement

• Lorem ipsum dolor sit amet, consectetur
  adipiscing elit, sed do eiusmod tempor incididunt
  ut labore et dolore magna aliqua.
• Ut enim ad minim veniam, quis nostrud

• Ut enim ad minim veniam, quis nostrud
  exercitation
• Duis aute irure dolor in reprehenderit in
  voluptate velit

• Excepteur sint occaecat cupidatat non proident,
  sunt in culpa qui officia deserunt mollit anim id
  est laborum.

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• Every one very curious about the interview
  questions because you dont know what type of
  questions Recruiter will ask so our embedded
  training institute in Bangalore is offering top
  10 questions for students who are eager to get a
  job in the embedded field. With Professional
  Training Institute, You can get embedded system
  training which is 100 practical based training
  so you can get a place soon. Here see top 10
  interview question in the embedded system.

• Challenge 1

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1)
What is the use of the volatile keyword?

• Beginner level (Fresher)
• Volatile is the keyword used for optimization by
  the compiler during code compilation. We are
  conveying the message to the compiler Hey look
  this pieces of code can be modified externally so
  dont optimized this code associated with the
  current variable.

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2)
Can a variable be both const and volatile?

• The const keyword makes sure that the value of
  the variable declared as constant cant be
  changed. This statement holds true in the scope
  of the full program. So if by mistake user tried
  to write on const variable compiler itself will
  give the error, and say read-only variable cant
  change.

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3)
What is a static variable? Or what is a static
keyword?

• A) Scope of Static Variable
• If the variable is defined in local scope then
  the scope of static variable will be within a
  function.
• B) Life of Static Variable
• Life of static variable is throughout the
  program. No matter it is defined in the local
  scope or global scope.

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4)
What is the difference between a global static
variable and a global variable?

• The scope of the global variable is throughout
  the program, while the scope of a static variable
  is within the file. Life of both variables
  (static variable and global) is throughout the
  program. Here understand question carefully.
  Questions are asking global static variable. It
  means is variable is saved in the file scope.
  Within file any function can use that variable,
  this variable will not be available in any other
  files.

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5)
What is the difference between structure and
union?

• C language is having many system-defined data
  types like char, int, float, double, long etc. we
  are also having an array of the above data types,
  which will help us to save more than many
  variables in contiguous locations.
• Read More

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6)
What is the function pointer, write delectation
(prototype of the following function pointer)?

• A function pointer is a variable, which can hold
  the address of the function. This is used in
  callbacks. Since C is sequential language. It
  processes one by one. However, for some cases, we
  may need to call a function based on conditions.

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7)
What is size of character, integer, integer
pointer, character pointer?

• The size of a character is 1 byte. Size of an
  integer is 4 bytes. Size of integer pointer and
  character is 8 bytes on a 64-bit machine and 4
  bytes on 32-bit machine. Size of pointers does
  not depend upon the type of parameters, because
  pointer needs to save memory address, it does not
  matter what we are going to save them or from
  that address who many bytes we want. We just need
  to save the address.

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8)
What is interrupt latency?

• Interrupt latency is the time required for an ISR
  responds to an interrupt. When interrupts occur
  in the embedded system, then the processor
  finishes current instruction, save the value of
  the program counter and jump to the required ISR.
  Sometime if the processor is busy and serving
  another interrupt then another interrupt may be
  pending till processor/controller is gets free
  from current ISR.

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9)
How to reduce interrupt latency?

• In order to reduce interrupt latency, while
  designing the system we should take a minimum
  time as possible in the ISR. We should divide our
  ISR into two part, The top half and bottom half.
  Top half should be very small and control should
  come out as soon as possible, normally in this
  section, we just copy the data, and generate some
  flags.

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10)
What is the dynamic memory allocation? Where we
can use this?

• In C language we are having many system-defined
  data types like int, char, float, double etc.
  Size of each one is fixed like it is 4 bytes,
  char is one byte, the float is 4 bytes etc.
• We are also having user-defined data types like
  struct, union. Here we struct reserve memory for
  each of its elements while union reserve memory
  for the highest data types.

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• We are a Professional Training Institute provides
  complete hands-on practical training in the
  embedded system, if you looking for embedded
  system training in Bangalore then choose us, as
  you go through our review and check what our old
  student is saying, they believe we are top
  embedded institute in Bangalore.
• Best of luck for your future.
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• Challenge 1