Variable Declaration And Scope

8 Questions | By Jawahar Ganesh | Updated: Dec 23, 2014 | Attempts: 110

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1/8 Questions

#include <stdio.h> extern int var; int main() { var = 10; printf("%d ", var); return 0; }
- Compiler Error: var is not defined
- 20
- 0

2.

Consider the following C program, which variable has the longest scope?int a; int main() { int b; // .. // ..} int c;
- A
- B
- C
- All have same scope
Correct Answer

A. A
3.

Output?#include <stdio.h> int main() { int x = 1, y = 2, z = 3; printf(" x = %d, y = %d, z = %d \n", x, y, z); { int x = 10; float y = 20; printf(" x = %d, y = %f, z = %d \n", x, y, z); { int z = 100; printf(" x = %d, y = %f, z = %d \n", x, y, z); } } return 0; }
- X = 1, y = 2, z = 3 x = 10, y = 20.000000, z = 3 x = 1, y = 2, z = 100
- Compiler Error
- X = 1, y = 2, z = 3 x = 10, y = 20.000000, z = 3 x = 10, y = 20.000000, z = 100
- X = 1, y = 2, z = 3 x = 1, y = 2, z = 3 x = 1, y = 2, z = 3
Correct Answer

A. X = 1, y = 2, z = 3 x = 10, y = 20.000000, z = 3 x = 10, y = 20.000000, z = 100
4.

#include <stdio.h> extern int var = 0; int main() { var = 10; printf("%d ", var); return 0; }
- 10
- Compiler Error: var is not defined
- 0
Correct Answer

A. 10
5.

Output?int main() { { int var = 10; } { printf("%d", var); } return 0; }
- 10
- Compiler Error
- Garbage value
Correct Answer

A. Compiler Error
6.

Consider the following two C linesint var1; extern int var2;Which of the following statements is correct
- Both statements only declare variables, don't define them
- First statement declares and defines var1, but second statement only declares var2
- Both statements declare define variables var1 and var2
Correct Answer

A. First statement declares and defines var1, but second statement only declares var2
7.

Int main() { int x = 032; printf("%d", x); return 0; }
- 32
- 0
- 26
- 50
Correct Answer

A. 26
8.

Predict the output#include <stdio.h> int var = 20; int main() { int var = var; printf("%d ", var); return 0; }
- Garbage Value
- 20
- Compiler Error
- Option 4
Correct Answer

A. Garbage Value

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Dec 23, 2014

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Dec 23, 2014

Quiz Created by
Jawahar Ganesh

Variable Declaration And Scope

#include <stdio.h> extern int var; int main() { var = 10; printf("%d ", var); return 0; }

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Consider the following C program, which variable has the longest scope?int a; int main() { int b; // .. // ..} int c;

Output?#include <stdio.h> int main() { int x = 1, y = 2, z = 3; printf(" x = %d, y = %d, z = %d \n", x, y, z); { int x = 10; float y = 20; printf(" x = %d, y = %f, z = %d \n", x, y, z); { int z = 100; printf(" x = %d, y = %f, z = %d \n", x, y, z); } } return 0; }

#include <stdio.h> extern int var = 0; int main() { var = 10; printf("%d ", var); return 0; }

Output?int main() { { int var = 10; } { printf("%d", var); } return 0; }

Consider the following two C linesint var1; extern int var2;Which of the following statements is correct

Int main() { int x = 032; printf("%d", x); return 0; }

Predict the output#include <stdio.h> int var = 20; int main() { int var = var; printf("%d ", var); return 0; }