Question 1

What is the precedence of arithmetic operators (from highest to lowest)?
A)%, *, /, +, -
B)%, +, /, *, -
C)+, -, %, *, /
D)%, +, -, *, /

Accepted Answer

The correct order of precedence for arithmetic operators, from highest to lowest, is: modulus (%), multiplication (*), division (/), addition (+), and subtraction (-). This order determines how expressions are evaluated in many programming languages.

Question 2

Which of the following is not an arithmetic operation?
A)a * = 10;
B)a / = 10;
C)a ! = 10;
D)a % = 10;

Accepted Answer

C) a ! = 10; is not an arithmetic operation. It is a syntax error as "!" is used for logical NOT in most programming languages, and the expression as written does not represent a valid operation. Options A, B, and D are examples of compound assignment operators for multiplication, division, and modulus respectively, which are arithmetic operations.

Question 3

Which of the following data type will throw an error on modulus operation(%)?
A)char
B)short
C)int
D)float

Accepted Answer

The modulus operation (%) is not defined for floating-point numbers in many programming languages, including C and Java. It is typically used with integer types (such as char, short, and int) to find the remainder of division. Floats and doubles, being non-integer types, do not support the modulus operation directly and attempting to use it will result in a compilation error.

Question 4

Which among the following are the fundamental arithmetic operators, i.e, performing the desired operation can be done using that operator only?
A)+, -
B)+, -, %
C)+, -, *, /
D)+, -, *, /, %

Accepted Answer

The answer of Which among the following are the fundamental...

Question 5

Are logical operator sequence points?
A)True
B)False
C)Depends on the compiler
D)Depends on the standard

Accepted Answer

Logical operators are sequence points.

Question 6

Do logical operators in the C language are evaluated with the short circuit?
A)True
B)False
C)Depends on the compiler
D)Depends on the standard

Accepted Answer

Logical operators in C (&& and ||) are evaluated with short-circuit evaluation, meaning the second operand is evaluated only if the first operand does not determine the result.

Question 7

What is the result of logical or relational expression in C?
A)True or False
B)0 or 1
C)0 if an expression is false and any positive number if an expression is true
D)None of the mentioned

Accepted Answer

In C, the result of a logical or relational expression is 0 if the expression is false and 1 if the expression is true.

Question 8

Relational operators cannot be used on ____________
A)structure
B)long
C)strings
D)float

Accepted Answer

Relational operators cannot be directly used on structures in C and C++ because structures are complex data types and the comparison logic between two structures is not inherently defined. For primitive data types like long and float, or even strings (with certain limitations and specific functions in some languages), relational operators can be used to compare values directly.

Question 9

Which among the following is NOT a logical or relational operator?
A)!=
B)==
C)=

Accepted Answer

The operator "=." does not exist as a standard logical or relational operator in programming languages. The "!=" and "==" are both logical or relational operators used for comparison (not equal to, and equal to, respectively).

Question 10

What is the type of the following assignment expression if x is of type float and y is of type int? y = x + y;
A)int
B)float
C)there is no type for an assignment expression
D)double

Accepted Answer

The answer of What is the type of the following...

Question 11

What will be the value of the following assignment expression? (x = foo())!= 1 considering foo() returns 2
A)2
B)True
C)1
D)0

Accepted Answer

The answer of What will be the value of the...

Question 12

Operation "a = a * b + a" can also be written as ___________
A)a *= b + 1;
B)(c = a * b)!=(a = c + a);
C)a = (b + 1)* a;
D)All of the mentioned

Accepted Answer

All of the mentioned choices are equivalent to the given operation "a = a * b + a".

Question 13

What will be the final value of c in the following C statement? (Initial value: c = 2) c <<= 1;
A)c = 1;
B)c = 2;
C)c = 3;
D)c = 4;

Accepted Answer

The <<= operator is a left shift assignment operator. It shifts the left operand's bits to the left by the number of positions specified by the right operand, and the result is assigned to the left operand. Here, c <<= 1 means c = c << 1, which is equivalent to shifting the bits of 2 (binary 10) one position to the left, resulting in 4 (binary 100).

Question 14

In expression i = g() + f(), first function called depends on __________
A)Compiler
B)Associativiy of () operator
C)Precedence of () and + operator
D)Left to write of the expression

Accepted Answer

The order in which functions `g()` and `f()` are called in the expression `i = g() + f()` depends on the compiler, as the C++ standard does not specify the order of evaluation for function arguments or subexpressions. Different compilers may evaluate `g()` and `f()` in different orders.

Question 15

Which operators of the following have same precedence? P. "!=", Q. "+=", R. "<<="
A)P and Q
B)Q and R
C)P and R
D)P, Q and R

Accepted Answer

The operators "+=" and "<<=" both have the same precedence level in most programming languages, including C and C++. They are assignment operators, which generally have the same level of precedence. The "!=" operator is a comparison operator and has a different level of precedence.

Question 16

Comment on the following statement n = 1; printf("%d, %dn", 3*n, n++);
A)Output will be 3, 2
B)Output will be 3, 1
C)Output will be 6, 1
D)Output is compiler dependent

Accepted Answer

The answer of Comment on the following statement n =...

Question 17

Which is correct representation of C statement? e = a * b + c / d * f;
A)e = (a * (b +(c /(d * f))));
B)e = ((a * b) + (c / (d * f)));
C)e = ((a * b) + ((c / d)* f));
D)Both e = ((a * b) + (c / (d * f))); and e = ((a * b) + ((c / d)* f));

Accepted Answer

Both e = ((a * b) + (c / (d * f))); and e = ((a * b) + ((c / d)* f)); are correct representations of the C statement e = a * b + c / d * f; because the order of operations in C is that multiplication and division are performed before addition and subtraction. Therefore, the expression a * b + c / d * f is evaluated as (a * b) + (c / (d * f)).

Question 18

While swapping 2 no' what at precautions to be taken care? b = (b / a); a = a * b; b = a / b;
A)Data type should be either of short, int and long
B)Data type should be either of float and double
C)All data types are accepted except for (char *)
D)This code doesn't swap 2 numbers

Accepted Answer

The code uses division and multiplication, which are suitable for floating-point numbers (float and double) to avoid precision issues.

Question 19

function tolower(c) defined in library <ctype.h> works for ___________
A)Ascii character set
B)Unicode character set
C)Ascii and utf-8 but not EBCDIC character set
D)Any character set

Accepted Answer

The answer of function tolower(c) defined in library <ctype.h> works...

Question 20

Which type of conversion is NOT accepted?
A)From char to int
B)From float to char pointer
C)From negative int to char
D)From double to char

Accepted Answer

Converting a float directly to a char pointer is not accepted because it involves converting a floating-point value to a pointer type, which is not a valid or safe conversion in most programming languages. This type of conversion could lead to undefined behavior or runtime errors.

Quiz 1: Introduction to C Language

What is the precedence of arithmetic operators (from highest to lowest) ?

Which of the following is not an arithmetic operation?

Which of the following data type will throw an error on modulus operation(%) ?

Which among the following are the fundamental arithmetic operators, i.e, performing the desired operation can be done using that operator only?

Are logical operator sequence points?

Do logical operators in the C language are evaluated with the short circuit?

What is the result of logical or relational expression in C?

Relational operators cannot be used on ____________

Which among the following is NOT a logical or relational operator?

What is the type of the following assignment expression if x is of type float and y is of type int? y = x + y;

What will be the value of the following assignment expression? (x = foo() ) != 1 considering foo() returns 2

Operation "a = a * b + a" can also be written as ___________

What will be the final value of c in the following C statement? (Initial value: c = 2) c <<= 1;

In expression i = g() + f() , first function called depends on __________

Which operators of the following have same precedence? P. "!=", Q. "+=", R. "<<="

Comment on the following statement n = 1; printf("%d, %dn", 3*n, n++) ;

Which is correct representation of C statement? e = a * b + c / d * f;

While swapping 2 no' what at precautions to be taken care? b = (b / a) ; a = a * b; b = a / b;

function tolower(c) defined in library works for ___________

Which type of conversion is NOT accepted?