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.

Why Ammeter is always connected in series in the circuit and Voltmeter in parallel?

14 Answers   BEL, College School Exams Tests, DRDO, Electrical Tech, UOB,

---

Write a c program to accept two strings of odd lengths 1. take all odd characters from one string & even character from other a and concatenate  & produce a string 2. us only one loop & no of times loop will be executed must be determined by length of long string.

1 Answers  

---

A rectangular plank (2)1/2 meters wide can be placed so that it is on either side of the diagonal of a square shown below.(Figure is not available) What is the area of the plank?

1 Answers   Google, Mu Sigma,

---

write an algorithm in O(n) time for finding the kth smaalest element form an array of n elements , where n and k are entered by user

0 Answers  

---

Define configuration and calibration and explain with an example

0 Answers  

---

---

Explain how a TP Monitor manages memory and processor resources more effectively than a typical operating system.

1 Answers   Infosys,

---

Explain about a light bulb

0 Answers  

---

DVC2000 performent: travel ??? and not output signal

0 Answers  

---

what is difference between class and object in c++

0 Answers   TCS,

---

1)what to do in emergency situation of having total blackout (on a ship) 2)what to do in emergency situation of flooding in the engine room 3)under what conditions would engine room bilges be pumped overboard? 4)why is high pressure required for the injection of fuel into the cylinder of diesel engine. 5)why is doubled walled pipes employed for high pressure fuel lines? 6)reasons for overheating of main engine 7)how to detect choked fuel valve,leaky piston rings and their remedies during operation in diesel engine? 8)effects of insufficient or excessive cylinder lubrication? 9)causes of a diesel engine piston overheating.

0 Answers   Maritime Academy,

---

SIR i hv compleated b.tech(computer science engineering) with 82% marks. i want to join shipping corporation of india. it's my career dream. please i am eleasible or not?

3 Answers   Shipping Corporation of India,

---

hi i am avinash ,i am doing ma b-tech(cse) final year and i have been detained for 2years due to attendance and i will be finished ma b-tech in 6 years ,plz tell me weather i will be eligible for government jobs like bhel, drdo,or any other private companies

0 Answers  

---