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Declarations and Initializations Questions

NA
SHSTTON
217
Solv. Corr.
338
Solv. In. Corr.
555
Attempted
0 M:40 S
Avg. Time

11 / 54

Choose the correct option.

What is the correct way to round off x, a float, to an int value?


Ay = (int)(x + 0.5);

By = int(x + 0.5);

Cy = (int)x+ 0.5;

Dy = (int)((int)x + 0.5);

Answer: Option A

Explanation:

Rounding off a value means replacing it by a nearest value that is approximately equal or smaller or greater to the given number.



y = (int)(x 0.5); here x is any float value. To roundoff, we have to typecast the value of x by using (int)

Workspace

NA
SHSTTON
78
Solv. Corr.
442
Solv. In. Corr.
520
Attempted
0 M:25 S
Avg. Time

12 / 54

Choose the correct option.

In C programming language the below statement means.


Ax = x-y + 1

Bx = -x -y - 1

Cx = -x + y + 1

Dx = x -y -1

Answer: Option D

Explanation:

what are these statements n C?

Workspace

NA
SHSTTON
199
Solv. Corr.
375
Solv. In. Corr.
574
Attempted
0 M:35 S
Avg. Time

13 / 54

What is the output of the following program ?
#include <stdio.h>
void main()
{
printf("%d",10?0?5:1:12);
}

A10

B0

C12

D1

Answer: Option D

Explanation:

In C, the syntax for ternary operators is:

            (Test condition) ?  value_if_true : value_if_false

Line no. 3 i.e, 10?(0?5:1):12 simply means if 10 is true then return (0?5:1) else return 12.

Again, (0?5:1) simply means if 0 is true then return 5 else return 1.

So here, 10 is true so the result is (0?5:1), and here 0 is false, which gives 1 as the output, hence the correct option is option D.

Workspace

NA
SHSTTON
296
Solv. Corr.
231
Solv. In. Corr.
527
Attempted
0 M:27 S
Avg. Time

14 / 54

What is the output of the following program?
#include<stdio.h>
void main()
{
int i= 5;
if (i == 5) 
return 0;
else 
printf("i is not five");
printf("over");
}

Aa syntax error

Ban execution error

Cprinting of overan error message

Dexecution termination, without printing anything

Answer: Option D

Explanation:

Clearly we can see that i value is initialised 5 and the condition i==5 is also true. Hence return 0; will be executed and the execution will be terminated without printing anything coz its return 0 and not print 0.



Return statement brings the control of the program out of the loop.

Workspace

NA
SHSTTON
177
Solv. Corr.
335
Solv. In. Corr.
512
Attempted
0 M:28 S
Avg. Time

15 / 54

What is the output of the following "c" program?
#include<stdio.h>
void main()
{
int i = 107, x = 5;
printf ((x > 7)? "%d" : "%c:, i)
}

Aan execution error

Ba syntex error

Cprinting of k

Dnone of these

Answer: Option C

Explanation:

printf ((x > 7)? "%d" : "%c:, i) x value assigned is 5 hence 5 is not greater than 7 so second condition i.e (%c:i)



will be executed means ascii value of small k is 107 so the character k will be printed. 

Workspace

NA
SHSTTON
373
Solv. Corr.
122
Solv. In. Corr.
495
Attempted
0 M:11 S
Avg. Time

16 / 54

What is the output of the following C Program?
#include<stdio.h>
void main()
{
int a=4, b = 6;
printf ("%d", a==b);
}

Aoutputs an error message

B0

C1

Dnone of these

Answer: Option B

Explanation:

printf ("%d", a==b);  It gives a boolean result i.e 1 for true and 0 for false. Since 4 is not equal to 6 hence output will be 0.

Workspace

NA
SHSTTON
171
Solv. Corr.
306
Solv. In. Corr.
477
Attempted
0 M:29 S
Avg. Time

17 / 54

Choose the correct option.

The rule for implicit type conversion in 'C' is


Aint < unsigned < float < double

Bunsigned < int < float < double

Cint < unsigned < double < float

Dunsigned < int < double < float

Answer: Option A

Explanation:

Generally takes place when in an expression more than one data type is present. In such condition type conversion (type promotion) takes place to avoid lose of data.



All the data types of the variables are upgraded to the data type of the variable with largest data type.

Workspace

NA
SHSTTON
181
Solv. Corr.
297
Solv. In. Corr.
478
Attempted
0 M:20 S
Avg. Time

18 / 54

Choose the correct option.

Integer division in a 'C' program results in


Atruncation

Brounding

Coverflow

Dnone of these

Answer: Option A

Explanation:

Its true answer is truncation. For example if we normally divide 3/2 we get 1.5



But in c language if we do integer division 3/2 we will only get 1 as the decimal values are removed by c compiler hence it truncates the value.

Workspace

NA
SHSTTON
321
Solv. Corr.
180
Solv. In. Corr.
501
Attempted
0 M:12 S
Avg. Time

19 / 54

Choose the correct option.

The value of an automatic variable that is declared but not initialized will be


A0

B'-1

Cgarbage

Dnone of these

Answer: Option C

Explanation:

Until and unless it is not initialised it will contain garbage value only.

Workspace

NA
SHSTTON
128
Solv. Corr.
339
Solv. In. Corr.
467
Attempted
0 M:31 S
Avg. Time

20 / 54

Choose the correct option.

Which of the following operators in 'C' does not associate from the left?


A+

B,

C=

D%

Answer: Option C

Explanation:

Operator Precedence Chart

The below table describes the precedence order and associations of operators in C / C++ . Precedence of operator decreases from top to bottom.

C-Precedence-Operator-Description-Associativity

Workspace

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