Sail E0 Webinar

MCQs

Total Questions : 43 | Page 5 of 5 pages
Question 41.


What would be output of the program ?


#include<stdio.h>
#define SWAP(a, b) int t; t=a, a=b, b=t;
int main()
{
int a=10, b=12;
SWAP(a, b);
printf("a = %d, b = %d\n", a, b);
return 0;
}
  1.    a = 10, b = 12
  2.    a = 12, b = 10
  3.    Error: Declaration not allowed in macro
  4.    Error: Undefined symbol 't'
 Discuss Question
Answer: Option B. -> a = 12, b = 10


The macro SWAP(a, b) int t; t=a, a=b, b=t; swaps the value of the given two variable.



Step 1: int a=10, b=12; The variable a and b are declared as an integer type and initialized to 10, 12 respectively.



Step 2: SWAP(a, b);. Here the macro is substituted and it swaps the value to variable a and b.


Hence the output of the program is 12, 10.



Question 42.

If the file to be included doesn't exist, the preprocessor flashes an error message


  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True


Question 43.

The c preprocessor can trap simple errors like missing declarations,nested comments or mismatch of braces


  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False


Latest Videos
Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)
Direction Sense Test Part 1 Reasoning (Hindi)
Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE
Cube & Cuboid Part 1 Reasoning (Hindi)
Data Interpretation (DI) Basic Concept Reasoning (Hindi)
Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)
Sail E0 free webinar Webinars
Real Numbers Part 7 Class 10 Maths
Real Numbers Part 1 Class 10 Maths
Polynomials Part 1 Class 10 Maths

Latest Test Papers

Pie Chart - Test Paper 1 Data Interpretation Reasoning & DI
Tabulation - Test Paper 2 Data Interpretation Reasoning & DI
Test Paper 1 Direction Sense Test Reasoning & DI
ICA , RDIC,GFM Free Modal Test Paper - Non - Technical Branch Old Syllabus 2022 - SAIL Junior Officer E0
GFM Combined 1 Free Revision Test SAIL JO E-0