Answer / ravi ranjan

A macro is a name given to a block of C statements as a
pre-processor directive. Being a pre-processor, the block of
code is communicated to the compiler before entering into
the actual coding (main () function). A macro is defined
with the preprocessor directive, #define.

Like::: #define A 10
#define SUM(x,y) ((x) + (y))

Advantages :::
1.Symbolic constants are evaluated by the PRE-processor,
i.e. they are re-written as literal values, not as
variables. this has some nice side-effects that you can do
using symbolic defines eg. macros and functions inside them.

run-time access to symbolic constants should be
significantly faster than access to variables.
opposite to that, variables (and constants) are evaluated by
the processor (compiler).

2. It is easy to modify the value of the constant
variable,since we have to change the value at the macro
defintion only

DisAdvantages:::

1. Macros are not useful when the function definitions are
Big and when the function is used many number of times.

Answer / deepedra kushwaha

A macro is a name given to a block of C statements as a
pre-processor directive. Being a pre-processor, the block of
code is communicated to the compiler before entering into
the actual coding (main () function). A macro is defined
with the preprocessor directive, #define.

The advantage of using macro is the execution speed of the
program fragment. When the actual code snippet is to be
used, it can be substituted by the name of the macro. The
same block of statements, on the other hand, need to be
repeatedly hard coded as and when required.

The disadvantage of the macro is the size of the program.
The reason is, the pre-processor will replace all the macros
in the program by its real definition prior to the
compilation process of the program.
Describe the advantages of using macro.

A macro is a name given to a block of the code which can be
substituted where the code snippet is to be used for more
than once.

- The speed of the execution of the program is the major
advantage of using a macro.

- It saves a lot of time that is spent by the compiler for
invoking / calling the functions.

- It reduces the length of the program.

A character set has 1 and 2 byte characters. One byte characters have 0 as the first bit. You just keep accumulating the characters in a buffer. Suppose at some point the user types a backspace, how can you remove the character efficiently. (Note: You cant store the last character typed because the user can type in arbitrarily many backspaces)

2 Answers   Microsoft,

---

Is there any difference between the concepts of encoding,decoding and encryption and decryption?

0 Answers  

---

plz send me interview questions & answers of Data Structure

0 Answers  

---

An inversion is an array of numbers is any pair (i,j) such that i<j and A[i]>A[j]. What is the average number of inversions in an array of n distinct numbers? plz GIVE ME SOLUTION

0 Answers   TCS,

---

Suppose you want to form a conceptual model of UML.What elements would you require for this purpose?

0 Answers  

---

What is the difference between while & do while loop

0 Answers  

---

What is Lease Line?Why power cord is not required to NT Boxex on which lease is connected ?Why we use use NT BOXEs for ISDN and Lease line?

0 Answers   HCL,

---

why this companay? For example: Why Dell?

1 Answers   DELL,

---

Sir, I was recently placed at ITC Infotect. My ctc is 2.46lpa. How much will I get in hand every month? Plssss answer. Thanx in advance.

0 Answers   ITC Infotech,

---

can u give me the information about the questions asked by the bally in campus

0 Answers  

---

What is the meaning of "co relation" and what is the value of "co relation" in the performance testing environment.

0 Answers  

---

what is the output of following question? int a=5; printf("%d",a++ + ++a);

3 Answers  

---