What are operators in C programming?

Operators in C programming are special symbols used to perform operations on variables and values. They include arithmetic operators, relational operators, logical operators, bitwise operators, and more. Understanding these operators is essential for writing effective and efficient C programs.

What is the difference between the `=` and `==` operators in C?

In C programming, the `=` operator is an assignment operator used to assign a value to a variable, whereas the `==` operator is a comparison operator used to compare two values for equality. For example, `a = 5` assigns the value 5 to `a`, while `a == 5` checks if `a` is equal to 5.

How do arithmetic operators work in C?

Arithmetic operators in C perform mathematical operations such as addition (`+`), subtraction (`-`), multiplication (`*`), division (`/`), and modulus (`%`). These operators work on numeric data types like `int`, `float`, and `double`. For example, `a + b` adds the values of `a` and `b`.

What are relational operators in C?

Relational operators in C are used to compare two values. They include `==` (equal to), `!=` (not equal to), `>` (greater than), ` =` (greater than or equal to), and `<=` (less than or equal to). These operators return a boolean value (true or false) based on the comparison.

What are logical operators in C?

Logical operators in C are used to combine multiple conditions. They include `&&` (logical AND), `||` (logical OR), and `!` (logical NOT). These operators are essential for controlling the flow of the program based on multiple conditions.

How does the increment (++) operator work in C?

The increment (`++`) operator in C increases the value of a variable by 1. It can be used in two forms: prefix (`++a`) and postfix (`a++`). In the prefix form, the variable is incremented before its value is used in an expression, while in the postfix form, the variable is incremented after its value is used.

What is the decrement (--) operator in C?

The decrement (`--`) operator in C decreases the value of a variable by 1. Similar to the increment operator, it has prefix (`--a`) and postfix (`a--`) forms, where the variable is decremented before or after its value is used in an expression, respectively.

How are bitwise operators used in C?

Bitwise operators in C perform operations on the binary representation of numbers. They include `&` (AND), `|` (OR), `^` (XOR), `~` (NOT), ` >` (right shift). These operators are useful for tasks that involve low-level data manipulation.

What is the conditional (ternary) operator in C?

The conditional (ternary) operator in C is a shorthand for the if-else statement. It uses the syntax `condition ? expression1 : expression2`. If the condition is true, `expression1` is evaluated; otherwise, `expression2` is evaluated. It's a concise way to perform simple conditional assignments.

How do assignment operators work in C?

Assignment operators in C are used to assign values to variables. Besides the simple `=` operator, there are compound assignment operators like `+=`, `-=`, `*=`, `/=`, and `%=`. These operators combine an arithmetic operation with assignment, making the code more concise.

What is operator precedence in C?

Operator precedence in C determines the order in which operators are evaluated in expressions. Operators with higher precedence are evaluated before those with lower precedence. For example, multiplication (`*`) has higher precedence than addition (`+`), so `2 + 3 * 4` is evaluated as `2 + (3 * 4)`.

How does operator associativity work in C?

Operator associativity in C defines the order in which operators of the same precedence are evaluated. Most operators are left-associative, meaning they are evaluated from left to right. For example, `a - b + c` is evaluated as `((a - b) + c)`. Some operators, like assignment (`=`), are right-associative.

What are unary operators in C?

Unary operators in C operate on a single operand. Examples include the increment (`++`), decrement (`--`), and negation (`-`) operators. These operators are used to modify or return the value of a single variable.

What is the sizeof operator in C?

The `sizeof` operator in C returns the size of a data type or a variable in bytes. It is useful for determining the memory requirements of various data types and structures. For example, `sizeof(int)` returns the size of an integer, which is typically 4 bytes.

How do you use the comma operator in C?

The comma operator in C allows you to evaluate multiple expressions in a single statement. It evaluates each expression from left to right and returns the value of the last expression. It is often used in for loops for initializing and updating multiple variables.

What is the purpose of the typecast operator in C?

The typecast operator in C is used to convert a variable from one data type to another. It is useful when you need to perform operations between different data types or when you want to control the type of a variable explicitly. The syntax is `(type) expression`, where `type` is the desired data type.

Can operators be overloaded in C?

No, operator overloading is not supported in C. Operator overloading allows you to define custom behavior for operators based on user-defined types, but this feature is available only in C++ and other object-oriented programming languages, not in C.

What are the compound assignment operators in C?

Compound assignment operators in C combine an arithmetic or bitwise operation with assignment. Examples include `+=`, `-=`, `*=`, `/=`, and `%=`. These operators provide a shorthand way to perform an operation on a variable and then assign the result back to the same variable.

What is the difference between `&&` and `&` in C?

In C, `&&` is the logical AND operator used to combine two boolean expressions, whereas `&` is the bitwise AND operator used to perform an AND operation on corresponding bits of two integers. `&&` evaluates to true only if both operands are true, while `&` operates on individual bits.

What is the difference between `||` and `|` in C?

In C, `||` is the logical OR operator used to combine two boolean expressions, whereas `|` is the bitwise OR operator used to perform an OR operation on corresponding bits of two integers. `||` evaluates to true if either operand is true, while `|` operates on individual bits.

What are the shift operators in C?

Shift operators in C are used to shift the bits of an integer value to the left or right. The left shift operator (` >`) shifts bits to the right. These operators are useful for performing efficient multiplication and division by powers of two.

Operators And Expressions MCQs - Part 1

Home » Programming Languages » C Programming » Operators and Expressions MCQs » Part 1 » 100 Questions

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1. Which of the following is the correct operator to assign a value to a variable in C?

ⓐ. ==

ⓑ. =

ⓒ. :=

ⓓ. ->

Correct Answer: =

Explanation: The = operator is used to assign a value to a variable in C. The == operator is used for comparison.

2. What does the expression 5 + 3 * 2 evaluate to in C?

ⓐ. 11

ⓑ. 16

ⓒ. 13

ⓓ. 10

Correct Answer: 11

Explanation: In C, the multiplication operator (*) has higher precedence than the addition operator (+), so the expression evaluates to 5 + (3 * 2) = 5 + 6 = 11.

3. Which operator is used to increment the value of a variable by 1 in C?

ⓐ. —

ⓑ. ++

ⓒ. +=

ⓓ. ^=

Correct Answer: ++

Explanation: The ++ operator is used to increment the value of a variable by 1 in C.

4. Which of the following is the correct syntax to use the conditional (ternary) operator in C?

ⓐ. condition ? expr1 : expr2;

ⓑ. condition ? expr1; : expr2;

ⓒ. condition : expr1 ? expr2;

ⓓ. condition : ? expr1 : expr2;

Correct Answer: condition ? expr1 : expr2;

Explanation: The conditional operator in C has the syntax condition ? expr1 : expr2, which evaluates expr1 if the condition is true, and expr2 if the condition is false.

5. Which operator is used for logical AND in C?

ⓐ. &

ⓑ. &&

ⓒ. |

ⓓ. ||

Correct Answer: &&

Explanation: The && operator is used for logical AND in C, which returns true if both operands are true.

6. What is the result of the expression 10 % 3 in C?

ⓐ. 1

ⓑ. 3

ⓒ. 10

ⓓ. 0

Correct Answer: 1

Explanation: The % operator in C is the modulus operator, which returns the remainder of the division. 10 % 3 equals 1 because 10 divided by 3 leaves a remainder of 1.

7. Which operator has the highest precedence in C?

ⓐ. &

ⓑ. +

ⓒ.

ⓓ. *()

Correct Answer: ()

Explanation: The parentheses operator (()) has the highest precedence in C, which allows expressions within parentheses to be evaluated first.

8. What does the expression (a > b) && (b > c) evaluate to if a = 5, b = 3, and c = 1?

ⓐ. true

ⓑ. false

ⓒ. 5

ⓓ. 3

Correct Answer: true

Explanation: The expression (a > b) && (b > c) evaluates to (5 > 3) && (3 > 1), which is true && true, resulting in true.

9. Which operator is used for bitwise OR in C?

ⓐ. ||

ⓑ. |

ⓒ. &&

ⓓ. &

Correct Answer: |

Explanation: The | operator is used for bitwise OR in C, which performs the OR operation on corresponding bits of two operands.

10. What is the result of the expression ~5 in C (assuming 5 is represented as 00000101 in binary)?

ⓐ. 4

ⓑ. -5

ⓒ. -6

ⓓ. 6

Correct Answer: -6

Explanation: The ~ operator is the bitwise NOT operator in C, which inverts all bits of the operand. ~5 results in the binary inversion of 00000101 to 11111010, which is -6 in two’s complement representation.

11. Which of the following operators is used for addition in C?

ⓐ. –

ⓑ.

ⓒ. */

ⓓ. +

Correct Answer: +

Explanation: The + operator is used for addition in C, which sums the values of two operands.

12. What will be the result of the expression 7 – 2 in C?

ⓐ. 5

ⓑ. 9

ⓒ. -5

ⓓ. 2

Correct Answer: 5

Explanation: The – operator is used for subtraction in C, so 7 – 2 evaluates to 5.

13. What is the value of the expression 4 * 3 in C?

ⓐ. 7

ⓑ. 12

ⓒ. 1

ⓓ. 15

Correct Answer: 12

Explanation: The * operator is used for multiplication in C, so 4 * 3 evaluates to 12.

14. Which operator is used for division in C?

ⓐ. %

ⓑ. /

ⓒ.

ⓓ. *-

Correct Answer: /

Explanation: The / operator is used for division in C, which divides the value of the left operand by the value of the right operand.

15. What is the result of the expression 10 / 2 in C?

ⓐ. 2

ⓑ. 5

ⓒ. 20

ⓓ. 8

Correct Answer: 5

Explanation: The / operator is used for division, so 10 / 2 evaluates to 5.

16. Which operator is used to find the remainder of a division in C?

ⓐ. /

ⓑ. –

ⓒ. %

ⓓ.

Correct Answer: %

Explanation: The % operator is used to find the remainder of a division in C.

17. What will be the result of the expression 15 % 4 in C?

ⓐ. 3

ⓑ. 4

ⓒ. 2

ⓓ. 1

Correct Answer: 3

Explanation: The % operator returns the remainder of the division, so 15 % 4 evaluates to 3.

18. Evaluate the expression (8 + 2) * 5 in C.

ⓐ. 40

ⓑ. 50

ⓒ. 45

ⓓ. 30

Correct Answer: 40

Explanation: Parentheses have the highest precedence, so (8 + 2) is evaluated first, resulting in 10. Then, 10 * 5 equals 40.

19. What will be the result of the expression 10 – 3 * 2 in C?

ⓐ. 14

ⓑ. 4

ⓒ. 16

ⓓ. 1

Correct Answer: 4

Explanation: The * operator has higher precedence than -, so the expression is evaluated as 10 – (3 * 2) = 10 – 6 = 4.

20. How does C evaluate the expression 12 / 5?

ⓐ. 2.4

ⓑ. 2

ⓒ. 2.0

ⓓ. 3

Correct Answer: 2

Explanation: In C, when both operands are integers, the / operator performs integer division, so 12 / 5 evaluates to 2.

21. What will be the value of the expression 3 + 4 * 2 – 1 in C?

ⓐ. 10

ⓑ. 9

ⓒ. 11

ⓓ. 6

Correct Answer: 10

Explanation: The * operator has higher precedence than + and -, so the expression is evaluated as 3 + (4 * 2) – 1 = 3 + 8 – 1 = 10.

22. Which of the following represents the correct order of precedence in C from highest to lowest for the given operators: +, *, %, -?

ⓐ. +, *, %, –

ⓑ. *, +, -, %

ⓒ. *, %, +, –

ⓓ. +, -, *, %

Correct Answer: *, %, +, –

Explanation: In C, the multiplication (*) and modulus (%) operators have higher precedence than addition (+) and subtraction (-).

23. What is the result of the expression 14 % 3 in C?

ⓐ. 1

ⓑ. 2

ⓒ. 3

ⓓ. 0

Correct Answer: 2

Explanation: The % operator returns the remainder of the division, so 14 % 3 evaluates to 2.

24. Evaluate the expression 9 / 4 * 3 in C.

ⓐ. 6.75

ⓑ. 6

ⓒ. 4

ⓓ. 9

Correct Answer: 6

Explanation: In C, the / and * operators have the same precedence and are evaluated from left to right, so 9 / 4 equals 2 (integer division), and 2 * 3 equals 6.

25. What will be the result of the expression (5 + 3) % 4 in C?

ⓐ. 3

ⓑ. 1

ⓒ. 4

ⓓ. 0

Correct Answer: 1

Explanation: Parentheses have the highest precedence, so (5 + 3) is evaluated first, resulting in 8. Then, 8 % 4 equals 0.

26. What is the value of the expression 7 + 5 / 2 in C?

ⓐ. 4

ⓑ. 6

ⓒ. 9

ⓓ. 7.5

Correct Answer: 9

Explanation: The / operator has higher precedence than +, so the expression is evaluated as 7 + (5 / 2) = 7 + 2 = 9.

27. Which of the following is the correct result of the expression 18 – 4 / 2 in C?

ⓐ. 7

ⓑ. 8

ⓒ. 16

ⓓ. 20

Correct Answer: 16

Explanation: The / operator has higher precedence than -, so the expression is evaluated as 18 – (4 / 2) = 18 – 2 = 16.

28. What will be the result of the expression 10 + 2 * 5 / 2 in C?

ⓐ. 20

ⓑ. 15

ⓒ. 25

ⓓ. 30

Correct Answer: 15

Explanation: The * and / operators have higher precedence than +, so the expression is evaluated as 10 + (2 * 5) / 2 = 10 + 10 / 2 = 10 + 5 = 15.

29. What is the value of the expression 8 / 4 + 6 * 3 in C?

ⓐ. 24

ⓑ. 20

ⓒ. 19

ⓓ. 18

Correct Answer: 18

Explanation: The / and * operators have higher precedence than +, so the expression is evaluated as (8 / 4) + (6 * 3) = 2 + 18 = 20.

30. Which of the following is the result of the expression 8 % 3 + 1 in C?

ⓐ. 3

ⓑ. 4

ⓒ. 2

ⓓ. 1

Correct Answer: 2

Explanation: The % operator has higher precedence than +, so the expression is evaluated as (8 % 3) + 1 = 2 + 1 = 3.

31. What will be the result of the expression 20 / 4 * 2 – 3 in C?

ⓐ. 7

ⓑ. 10

ⓒ. 8

ⓓ. 6

Correct Answer: 7

Explanation: The / and * operators have higher precedence than -, so the expression is evaluated as (20 / 4) * 2 – 3 = 5 * 2 – 3 = 10 – 3 = 7.

32. Evaluate the expression 4 * 2 % 3 in C.

ⓐ. 0

ⓑ. 1

ⓒ. 2

ⓓ. 3

Correct Answer: 1

Explanation: The * and % operators have the same precedence and are evaluated from left to right, so the expression is evaluated as (4 * 2) % 3 = 8 % 3 = 2.

33. Which of the following is the correct result of the expression 7 + 3 * (6 / 2) in C?

ⓐ. 16

ⓑ. 20

ⓒ. 14

ⓓ. 13

Correct Answer: 16

Explanation: Parentheses have the highest precedence, so (6 / 2) is evaluated first, resulting in 3. Then, the expression is evaluated as 7 + 3 * 3 = 7 + 9 = 16.

34. What is the value of the expression 5 * (2 + 3) – 4 / 2 in C?

ⓐ. 21

ⓑ. 23

ⓒ. 18

ⓓ. 19

Correct Answer: 21

Explanation: Parentheses have the highest precedence, so (2 + 3) is evaluated first, resulting in 5. Then, the expression is evaluated as 5 * 5 – 4 / 2 = 25 – 2 = 23.

35. Which of the following is the correct result of the expression (9 + 3) / 3 * 2 in C?

ⓐ. 8

ⓑ. 6

ⓒ. 5

ⓓ. 12

Correct Answer: 12

Explanation: Parentheses have the highest precedence, so (9+ 3) is evaluated first, resulting in 12. Then, the expression is evaluated as 12 / 3 * 2 = 4 * 2 = 8.

36. Evaluate the expression 6 – 2 + 3 * 4 / 2 in C.

ⓐ. 13

ⓑ. 8

ⓒ. 10

ⓓ. 12

Correct Answer: 12

Explanation: The * and / operators have higher precedence than + and -, so the expression is evaluated as 6 – 2 + (3 * 4) / 2 = 6 – 2 + 6 = 4 + 6 = 10.

37. What is the value of the expression 15 % 6 + 2 in C?

ⓐ. 3

ⓑ. 5

ⓒ. 8

ⓓ. 6

Correct Answer: 5

Explanation: The % operator has higher precedence than +, so the expression is evaluated as (15 % 6) + 2 = 3 + 2 = 5.

38. Which of the following is the correct result of the expression 2 + 3 * 4 % 5 in C?

ⓐ. 6

ⓑ. 5

ⓒ. 3

ⓓ. 2

Correct Answer: 6

Explanation: The * and % operators have higher precedence than +, so the expression is evaluated as 2 + (3 * 4) % 5 = 2 + 12 % 5 = 2 + 2 = 4.

39. What will be the result of the expression 8 / 2 – 5 % 3 in C?

ⓐ. 1

ⓑ. 2

ⓒ. 3

ⓓ. 0

Correct Answer: 1

Explanation: The / and % operators have higher precedence than -, so the expression is evaluated as (8 / 2) – (5 % 3) = 4 – 2 = 2.

40. Which of the following is the result of the expression 7 – 5 * 2 / 4 in C?

ⓐ. 4

ⓑ. 5

ⓒ. 6

ⓓ. 3

Correct Answer: 5

Explanation: The * and / operators have higher precedence than -, so the expression is evaluated as 7 – (5 * 2) / 4 = 7 – 10 / 4 = 7 – 2 = 5.

41. Which of the following relational operators is used to check if two values are equal in C?

ⓐ. =

ⓑ. ==

ⓒ. !=

ⓓ. <=

Correct Answer: ==

Explanation: The == operator is used to check if two values are equal in C.

42. What will be the result of the expression 5 > 3 in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: true

Explanation: The > operator checks if the left operand is greater than the right operand, so 5 > 3 evaluates to true.

43. Which operator is used to check if two values are not equal in C?

ⓐ. ==

ⓑ. <

ⓒ. !=

ⓓ. <=

Correct Answer: !=

Explanation: The != operator is used to check if two values are not equal in C.

44. What is the result of the expression 7 <= 7 in C?

ⓐ. true

ⓑ. false

ⓒ. 1

ⓓ. 0

Correct Answer: true

Explanation: The <= operator checks if the left operand is less than or equal to the right operand, so 7 <= 7 evaluates to true.

45. Which relational operator is used to check if the left operand is less than the right operand in C?

ⓐ. >

ⓑ. <

ⓒ. !=

ⓓ. >=

Correct Answer: <

Explanation: The < operator is used to check if the left operand is less than the right operand in C.

46. What will be the result of the expression 9 == 10 in C?

ⓐ. true

ⓑ. false

ⓒ. 1

ⓓ. 0

Correct Answer: false

Explanation: The == operator checks if two values are equal, so 9 == 10 evaluates to false.

47. Which of the following expressions evaluates to true in C?

ⓐ. 5 != 5

ⓑ. 8 < 8

ⓒ. 10 <= 10

ⓓ. 6 > 6

Correct Answer: 10 <= 10

Explanation: The <= operator checks if the left operand is less than or equal to the right operand, so 10 <= 10 evaluates to true.

48. What is the result of the expression 4 >= 6 in C?

ⓐ. true

ⓑ. false

ⓒ. 1

ⓓ. 0

Correct Answer: false

Explanation: The >= operator checks if the left operand is greater than or equal to the right operand, so 4 >= 6 evaluates to false.

49. Which operator is used to check if the left operand is greater than or equal to the right operand in C?

ⓐ. <

ⓑ. >

ⓒ. <=

ⓓ. >=

Correct Answer: >=

Explanation: The >= operator is used to check if the left operand is greater than or equal to the right operand in C.

50. What will be the result of the expression 15 != 20 in C?

ⓐ. true

ⓑ. false

ⓒ. 1

ⓓ. 0

Correct Answer: true

Explanation: The != operator checks if two values are not equal, so 15 != 20 evaluates to true.

51. Which of the following expressions evaluates to false in C?

ⓐ. 7 == 7

ⓑ. 9 > 8

ⓒ. 3 != 3

ⓓ. 5 <= 5

Correct Answer: 3 != 3

Explanation: The != operator checks if two values are not equal, so 3 != 3 evaluates to false.

52. What is the result of the expression 12 < 9 in C?

ⓐ. true

ⓑ. false

ⓒ. 1

ⓓ. 0

Correct Answer: false

Explanation: The < operator checks if the left operand is less than the right operand, so 12 < 9 evaluates to false.

53. Which operator is used to check if two values are equal or if the left operand is less than the right operand in C?

ⓐ. ==

ⓑ. <=

ⓒ. <

ⓓ. !=

Correct Answer: <=

Explanation: The <= operator is used to check if two values are equal or if the left operand is less than the right operand in C.

54. What will be the result of the expression 8 > 2 && 3 < 4 in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: true

Explanation: The && operator is the logical AND operator, so 8 > 2 && 3 < 4 evaluates to true && true, resulting in true.

55. What is the result of the expression 10 == 10 && 5 != 6 in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: true

Explanation: The && operator is the logical AND operator, so 10 == 10 && 5 != 6 evaluates to true && true, resulting in true.

56. Which of the following expressions evaluates to true in C?

ⓐ. 4 > 5

ⓑ. 6 <= 5

ⓒ. 9 == 9

ⓓ. 8 != 8

Correct Answer: 9 == 9

Explanation: The == operator checks if two values are equal, so 9 == 9 evaluates to true.

57. What will be the result of the expression 2 < 3 || 4 > 5 in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: true

Explanation: The || operator is the logical OR operator, so 2 < 3 || 4 > 5 evaluates to true || false, resulting in true.

58. Which relational operator is used to check if the left operand is greater than the right operand in C?

ⓐ. <

ⓑ. >

ⓒ. <=

ⓓ. !=

Correct Answer: >

Explanation: The > operator is used to check if the left operand is greater than the right operand in C.

59. What will be the result of the expression 11 <= 10 in C?

ⓐ. true

ⓑ. false

ⓒ. 1

ⓓ. 0

Correct Answer: false

Explanation: The <= operator checks if the left operand is less than or equal to the right operand, so 11 <= 10 evaluates to false.

60. Which of the following expressions evaluates to false in C?

ⓐ. 7 != 6

ⓑ. 5 > 4

ⓒ. 8 == 8

ⓓ. 3 < 2

Correct Answer: 3 < 2

Explanation: The < operator checks if the left operand is less than the right operand, so 3 < 2 evaluates to false.

61. What will be the result of the expression 6 >= 3 && 4 < 2 in C?

ⓐ. true

ⓑ. false

ⓒ. 1

ⓓ. 0

Correct Answer: false

Explanation: The && operator is the logical AND operator, so 6 >= 3 && 4 < 2 evaluates to true && false, resulting in false.

62. Which of the following expressions evaluates to true in C?

ⓐ. 3 > 4

ⓑ. 6 < 2

ⓒ. 9 >= 9

ⓓ. 5 == 6

Correct Answer: 9 >= 9

Explanation: The >= operator checks if the left operand is greater than or equal to the right operand, so 9 >= 9 evaluates to true.

63. What is the result of the expression 14 != 14 || 7 == 7 in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: true

Explanation: The || operator is the logical OR operator, so 14 != 14 || 7 == 7 evaluates to false || true, resulting in true.

64. Which relational operator is used to check if the left operand is less than or equal to the right operand in C?

ⓐ. ==

ⓑ. <

ⓒ. <=

ⓓ. !=

Correct Answer: <=

Explanation: The <= operator is used to check if the left operand is less than or equal to the right operand in C.

65. What will be the result of the expression 13 > 8 && 4 == 4 in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: true

Explanation: The && operator is the logical AND operator, so 13 > 8 && 4 == 4 evaluates to true && true, resulting in true.

66. Which of the following expressions evaluates to true in C?

ⓐ. 10 < 5

ⓑ. 3 >= 4

ⓒ. 8 != 9

ⓓ. 6 == 7

Correct Answer: 8 != 9

Explanation: The != operator checks if two values are not equal, so 8 != 9 evaluates to true.

67. What will be the result of the expression 5 < 2 || 7 > 3 in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: true

Explanation: The || operator is the logical OR operator, so 5 < 2 || 7 > 3 evaluates to false || true, resulting in true.

68. What is the result of the expression 4 >= 4 && 3 !=3 in C?

ⓐ. true

ⓑ. false

ⓒ. 1

ⓓ. 0

Correct Answer: false

Explanation: The && operator is the logical AND operator, so 4 >= 4 && 3 != 3 evaluates to true && false, resulting in false.

69. Which relational operator is used to check if two values are not equal in C?

ⓐ. ==

ⓑ. <

ⓒ. <=

ⓓ. !=

Correct Answer: !=

Explanation: The != operator is used to check if two values are not equal in C.

70. What will be the result of the expression 18 <= 20 && 10 > 5 in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: true

Explanation: The && operator is the logical AND operator, so 18 <= 20 && 10 > 5 evaluates to true && true, resulting in true.

71. Which logical operator is used to represent logical AND in C?

ⓐ. ||

ⓑ. &&

ⓒ. !

ⓓ. &

Correct Answer: &&

Explanation: The && operator is used to represent logical AND in C.

72. Which of the following represents logical OR in C?

ⓐ. &&

ⓑ. ||

ⓒ. !

ⓓ. |

Correct Answer: ||

Explanation: The || operator is used to represent logical OR in C.

73. What does the ! operator represent in C?

ⓐ. AND

ⓑ. OR

ⓒ. NOT

ⓓ. NAND

Correct Answer: NOT

Explanation: The ! operator is used to represent logical NOT in C.

74. What will be the result of the expression !(5 > 3) in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: false

Explanation: The expression 5 > 3 evaluates to true, and the ! operator negates it, resulting in false.

75. Which of the following expressions evaluates to true in C?

ⓐ. 3 > 5 && 4 < 6

ⓑ. 2 < 1 || 3 > 2

ⓒ. !(4 == 4)

ⓓ. !(5 < 3)

Correct Answer: 2 < 1 || 3 > 2

Explanation: The expression 2 < 1 is false, and 3 > 2 is true. Since || is logical OR, the entire expression evaluates to true.

76. What will be the result of the expression 4 > 2 && 3 <= 1 in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: false

Explanation: The expression 4 > 2 is true, and 3 <= 1 is false. Since && is logical AND, the entire expression evaluates to false.

77. Which operator is used to negate a logical expression in C?

ⓐ. &&

ⓑ. ||

ⓒ. !

ⓓ. &

Correct Answer: !

Explanation: The ! operator is used to negate a logical expression in C.

78. What is the result of the expression !(7 == 5) in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: true

Explanation: The expression 7 == 5 is false, and the ! operator negates it, resulting in true.

79. Which of the following expressions evaluates to false in C?

ⓐ. !(2 > 1)

ⓑ. 3 > 2 && 4 < 5

ⓓ. !(5 <= 5)

Correct Answer: !(5 <= 5)

Explanation: The expression 5 <= 5 is true, and the ! operator negates it, resulting in false.

80. What will be the result of the expression 8 < 6 || 3 == 3 in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: true

Explanation: The expression 8 < 6 is false, and 3 == 3 is true. Since || is logical OR, the entire expression evaluates to true.

81. Which of the following is true about the && operator in C?

ⓐ. It returns true if at least one operand is true.

ⓑ. It returns false if at least one operand is false.

ⓓ. It performs bitwise AND operation.

Correct Answer: It returns false if at least one operand is false.

Explanation: The && operator returns false if at least one of its operands is false; it only returns true if both operands are true.

82. What will be the result of the expression !(5 != 5) in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: true

Explanation: The expression 5 != 5 is false, and the ! operator negates it, resulting in true.

83. Which logical operator is used to combine multiple conditions where at least one must be true in C?

ⓐ. &&

ⓑ. ||

ⓒ. !

ⓓ. &

Correct Answer: ||

Explanation: The || operator is used to combine multiple conditions where at least one must be true in C.

84. What is the result of the expression !(4 < 2 || 2 > 1) in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: false

Explanation: The expression 4 < 2 is false, and 2 > 1 is true. Since || is logical OR, the expression 4 < 2 || 2 > 1 evaluates to true, and the ! operator negates it, resulting in false.

85. Which of the following expressions evaluates to true in C?

ⓐ. 3 == 3 && 4 != 4

ⓑ. 2 >= 2 || 1 < 0

ⓒ. !(5 > 2)

ⓓ. 6 <= 6 && 7 > 8

Correct Answer: 2 >= 2 || 1 < 0

Explanation: The expression 2 >= 2 is true, and 1 < 0 is false. Since || is logical OR, the entire expression evaluates to true.

86. What will be the result of the expression 9 > 3 && !(2 == 2) in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: false

Explanation: The expression 9 > 3 is true, and 2 == 2 is true. The ! operator negates 2 == 2 to false. Since && is logical AND, the entire expression evaluates to false.

87. Which logical operator is used to check if both conditions are true in C?

ⓐ. ||

ⓑ. &&

ⓒ. !

ⓓ. &

Correct Answer: &&

Explanation: The && operator is used to check if both conditions are true in C.

88. What is the result of the expression !(6 <= 6 || 3 > 4) in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: false

Explanation: The expression 6 <= 6 is true, and 3 > 4 is false. Since || is logical OR, the expression 6 <= 6 || 3 > 4 evaluates to true, and the ! operator negates it, resulting in false.

89. Which of the following expressions evaluates to true in C?

ⓐ. !(1 != 1)

ⓑ. 4 < 3 || 2 > 5

ⓓ. !(7 <= 7)

Correct Answer: !(1 != 1)

Explanation: The expression 1 != 1 is false, and the ! operator negates it, resulting in true.

90. What will be the result of the expression 10 != 10 || 5 < 3 in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: false

Explanation: The expression 10 != 10 is false, and 5 < 3 is false. Since || is logical OR, the entire expression evaluates to false.

91. Which of the following represents logical NOT in C?

ⓐ. &&

ⓑ. ||

ⓒ. !

ⓓ. &

Correct Answer: !

Explanation: The ! operator represents logical NOT in C.

92. What is the result of the expression 7 <= 5 || 3 == 3 && !(2 > 1) in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: false

Explanation: The expression 7 <= 5 is false, and 3 == 3 is true. The ! operator negates 2 > 1 to false. Since && has higher precedence than ||, the expression 3 == 3 && !(2 > 1) evaluates to true && false, resulting in false. The entire expression then evaluates to false || false, resulting in false.

93. Which logical operator is used to combine multiple conditions where both must be true in C?

ⓐ. &&

ⓑ. ||

ⓒ. !

ⓓ. &

Correct Answer: &&

Explanation: The && operator is used to combine multiple conditions where both must be true in C.

94. What will be the result of the expression !(8 >= 8 && 4 != 4) in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: true

Explanation: The expression 8 >= 8 is true, and 4 != 4 is false. Since && is logical AND, the expression 8 >= 8 && 4 != 4 evaluates to true && false, resulting in false. The ! operator negates it, resulting in true.

95. Which of the following expressions evaluates to false in C?

ⓐ. !(3 < 2)

ⓑ. 6 == 6 && 7 != 7

ⓓ. 4 <= 4 && 2 >= 1

Correct Answer: 6 == 6 && 7 != 7

Explanation: The expression 6 == 6 is true, and 7 != 7 is false. Since && is logical AND, the entire expression evaluates to true && false, resulting in false.

96. What will be the result of the expression 5 < 2 && 3 > 1 in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: false

Explanation: The expression 5 < 2 is false, and 3 > 1 is true. Since && is logical AND, the entire expression evaluates to false.

97. Which logical operator is used to combine multiple conditions where at least one must be true in C?

ⓐ. &&

ⓑ. ||

ⓒ. !

ⓓ. &

Correct Answer: ||

Explanation: The || operator is used to combine multiple conditions where at least one must be true in C.

98. What is the result of the expression !(4 > 2 && 1 < 3) in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: false

Explanation: The expression 4 > 2 is true, and 1 < 3 is true. Since && is logical AND, the expression 4 > 2 && 1 < 3 evaluates to true. The ! operator negates it, resulting in false.

99. Which of the following expressions evaluates to true in C?

ⓐ. 2 == 3 || 4 < 5

ⓑ. 5 > 6 && 7 <= 7

ⓒ. !(8 != 8)

ⓓ. 3 > 4 || 2 == 2

Correct Answer: 3 > 4 || 2 == 2

Explanation: The expression 3 > 4 is false, and 2 == 2 is true. Since || is logical OR, the entire expression evaluates to true.

100. What will be the result of the expression !(6 != 6 || 5 > 1) in C?

ⓐ. true

ⓑ. false

ⓒ. 0

ⓓ. 1

Correct Answer: false

Explanation: The expression 6 != 6 is false, and 5 > 1 is true. Since || is logical OR, the expression 6 != 6 || 5 > 1 evaluates to false || true, resulting in true. The ! operator negates it, resulting in false.

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Operators and Expressions MCQs – Part 1

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