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- Question
Which of the following is the correct order if calling functions in the below code?
a = f1(23, 14) * f2(12/4) + f3();
Options- A. f1, f2, f3
- B. f3, f2, f1
- C. Order may vary from compiler to compiler
- D. None of above
- Correct Answer
- Order may vary from compiler to compiler
ExplanationHere, Multiplication will happen before the addition, but in which order the functions would be called is undefined. In an arithmetic expression the parenthesis tell the compiler which operands go with which operators but do not force the compiler to evaluate everything within the parenthesis first. - 1. Which of the following special symbol allowed in a variable name?
Options- A. * (asterisk)
- B. | (pipeline)
- C. - (hyphen)
- D. _ (underscore) Discuss
- 2. By default a real number is treated as a
Options- A. float
- B. double
- C. long double
- D. far double Discuss
- 3. Identify which of the following are declarations
1 : extern int x; 2 : float square ( float x ) { ... } 3 : double pow(double, double);
Options- A. 1
- B. 2
- C. 1 and 3
- D. 3 Discuss
- 4. What are the types of linkages?
Options- A. Internal and External
- B. External, Internal and None
- C. External and None
- D. Internal Discuss
- 5. How would you round off a value from 1.66 to 2.0?
Options- A. ceil(1.66)
- B. floor(1.66)
- C. roundup(1.66)
- D. roundto(1.66) Discuss
- 6. Which of the following are unary operators in C?
1. ! 2. sizeof 3. ~ 4. &&
Options- A. 1, 2
- B. 1, 3
- C. 2, 4
- D. 1, 2, 3 Discuss
- 7. Which of the following is the correct order of evaluation for the below expression?
z = x + y * z / 4 % 2 - 1
Options- A. * / % + - =
- B. = * / % + -
- C. / * % - + =
- D. * % / - + = Discuss
- 8. Which of the following correctly shows the hierarchy of arithmetic operations in C?
Options- A. / + * -
- B. * - / +
- C. + - / *
- D. / * + - Discuss
- B - Brackets first
- O - Orders (ie Powers and Square Roots, etc.)
- DM - Division and Multiplication (left-to-right)
- AS - Addition and Subtraction (left-to-right)
- 9. In which order do the following gets evaluated
1. Relational 2. Arithmetic 3. Logical 4. Assignment
Options- A. 2134
- B. 1234
- C. 4321
- D. 3214 Discuss
- 10. Which of the following is the correct usage of conditional operators used in C?
Options- A. a>b ? c=30 : c=40;
- B. a>b ? c=30;
- C. max = a>b ? a>c?a:c:b>c?b:c
- D. return (a>b)?(a:b) Discuss
Expressions problems
Search Results
Correct Answer: _ (underscore)
Explanation:
Variable names in C are made up of letters (upper and lower case) and digits. The underscore character ("_") is also permitted. Names must not begin with a digit.
Examples of valid (but not very descriptive) C variable names:
=> foo
=> Bar
=> BAZ
=> foo_bar
=> _foo42
=> _
=> QuUx
Correct Answer: double
Explanation:
In computing, 'real number' often refers to non-complex floating-point numbers. It include both rational numbers, such as 42 and 3/4, and irrational numbers such as pi = 3.14159265...
When the accuracy of the floating point number is insufficient, we can use the double to define the number. The double is same as float but with longer precision and takes double space (8 bytes) than float.
To extend the precision further we can use long double which occupies 10 bytes of memory space.
Correct Answer: 1 and 3
Explanation:
extern int x; - is an external variable declaration.
double pow(double, double); - is a function prototype declaration.
Therefore, 1 and 3 are declarations. 2 is definition.
double pow(double, double); - is a function prototype declaration.
Therefore, 1 and 3 are declarations. 2 is definition.
Correct Answer: External, Internal and None
Explanation:
External Linkage-> means global, non-static variables and functions.
Internal Linkage-> means static variables and functions with file scope.
None Linkage-> means Local variables.
Internal Linkage-> means static variables and functions with file scope.
None Linkage-> means Local variables.
Correct Answer: ceil(1.66)
Explanation:
/* Example for ceil() and floor() functions: */
#include<stdio.h>
#include<math.h>
int main()
{
printf("\n Result : %f" , ceil(1.44) );
printf("\n Result : %f" , ceil(1.66) );
printf("\n Result : %f" , floor(1.44) );
printf("\n Result : %f" , floor(1.66) );
return 0;
}
// Output:
// Result : 2.000000
// Result : 2.000000
// Result : 1.000000
// Result : 1.000000
Correct Answer: 1, 2, 3
Explanation:
An operation with only one operand is called unary operation.
Unary operators:
! Logical NOT operator.
~ bitwise NOT operator.
sizeof Size-of operator.
Unary operators:
! Logical NOT operator.
~ bitwise NOT operator.
sizeof Size-of operator.
&& Logical AND is a logical operator.
Therefore, 1, 2, 3 are unary operators.
Correct Answer: * / % + - =
Explanation:
C uses left associativity for evaluating expressions to break a tie between two operators having same precedence.
Correct Answer: / * + -
Explanation:
Simply called as BODMAS (Bracket of Division, Multiplication, Addition and Subtraction).
How Do I Remember ? BODMAS !
Correct Answer: 2134
Explanation:
2. Arithmetic operators: *, /, %, +, -
1. Relational operators: >, <, >=, <=, ==, !=
3. Logical operators : !, &&, ||
4. Assignment operators: =
1. Relational operators: >, <, >=, <=, ==, !=
3. Logical operators : !, &&, ||
4. Assignment operators: =
Correct Answer: max = a>b ? a>c?a:c:b>c?b:c
Explanation:
Option A: assignment statements are always return in paranthesis in the case of conditional operator. It should be a>b? (c=30):(c=40);
Option B: it is syntatically wrong.
Option D: syntatically wrong, it should be return(a>b ? a:b);
Option C: it uses nested conditional operator, this is logic for finding greatest number out of three numbers.
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