MCQs on Operators and Expressions | Lua

What does the + operator do in Lua?
- a) Concatenates strings
- b) Adds two numbers
- c) Compares two numbers
- d) Subtracts two numbers
What will 10 % 3 return in Lua?
- a) 1
- b) 3
- c) 0
- d) 10
Which operator is used for exponentiation in Lua?
- a) **
- b) ^
- c) ^^
- d) exp()
What is the result of 15 // 4 in Lua?
- a) 3.75
- b) 4
- c) 3
- d) 15
Which of these is NOT a valid arithmetic operator in Lua?
- a) +
- b) -
- c) ++
- d) %
What does -a represent in Lua?
- a) Negation of a
- b) Absolute value of a
- c) Positive a
- d) Logical NOT
What will 5 + 2 * 3 return in Lua?
- a) 21
- b) 11
- c) 15
- d) 7
Can arithmetic operators be used on strings in Lua?
- a) No, it causes an error
- b) Yes, Lua converts strings to numbers
- c) Only with concatenation
- d) Only if strings are numerical

Which operator checks equality in Lua?
- a) =
- b) ==
- c) ===
- d) isEqual()
What does a ~= b mean in Lua?
- a) a is greater than b
- b) a is not equal to b
- c) a is less than or equal to b
- d) Logical NOT of a and b
Which relational operator checks if one value is greater than another?
- a) >
- b) <
- c) >=
- d) <=
What does false == nil return in Lua?
- a) true
- b) false
- c) nil
- d) Error
Can relational operators compare strings in Lua?
- a) Yes, based on lexicographic order
- b) No, it causes an error
- c) Only with numeric strings
- d) Only with ==
What is the result of "apple" < "banana" in Lua?
- a) true
- b) false
- c) Error
- d) nil
What does the <= operator signify?
- a) Less than or equal to
- b) Greater than or equal to
- c) Logical AND
- d) Logical OR

What does the and operator do in Lua?
- a) Performs bitwise AND
- b) Returns true only if both operands are true
- c) Returns the negation of operands
- d) Combines strings
What is the result of true and false in Lua?
- a) true
- b) false
- c) nil
- d) Error
What is the difference between or and and operators?
- a) or requires both conditions to be true
- b) or returns true if either condition is true
- c) and works only on numbers
- d) Both are equivalent
What is the output of not true in Lua?
- a) true
- b) false
- c) nil
- d) Error
Logical operators in Lua treat nil as:
- a) true
- b) false
- c) Error-prone
- d) Undefined

Which operator is used to concatenate strings in Lua?
- a) +
- b) ..
- c) &
- d) concat()
What is the output of "Lua" .. " Programming"?
- a) Lua Programming
- b) LuaProgramming
- c) Lua+Programming
- d) Error
Can you concatenate numbers and strings directly using ..?
- a) No, it causes an error
- b) Yes, Lua converts numbers to strings
- c) Only with explicit conversion
- d) Only with formatted strings
What will "Lua" .. nil output?
- a) Lua nil
- b) Lua
- c) Error
- d) nil
How do you add a space while concatenating strings?
- a) "A" .. " " .. "B"
- b) "A" + " " + "B"
- c) "A B"
- d) "A & B"

Which operator has the highest precedence in Lua?
- a) ^
- b) *
- c) +
- d) and
What is the associativity of the concatenation operator (..)?
- a) Left-to-right
- b) Right-to-left
- c) No associativity
- d) Error
Which operator has the lowest precedence in Lua?
- a) or
- b) and
- c) +
- d) ^
How is a + b * c evaluated in Lua?
- a) (a + b) * c
- b) a + (b * c)
- c) a + b + c
- d) a * (b + c)
What is the precedence order of Lua operators?
- a) Arithmetic > Relational > Logical
- b) Logical > Arithmetic > Relational
- c) Relational > Logical > Arithmetic
- d) Logical > Relational > Arithmetic

Qno	Answer
1	b) Adds two numbers
2	a) 1
3	b) `^`
4	c) 3
5	c) `++`
6	a) Negation of `a`
7	b) 11
8	b) Yes, Lua converts strings to numbers
9	b) `==`
10	b) `a` is not equal to `b`
11	a) `>`
12	b) `false`
13	a) Yes, based on lexicographic order
14	a) `true`
15	a) Less than or equal to
16	b) Returns `true` only if both operands are true
17	b) `false`
18	b) `or` returns true if either condition is true
19	b) `false`
20	b) `false`
21	b) `..`
22	b) `LuaProgramming`
23	b) Yes, Lua converts numbers to strings
24	c) Error
25	a) `"A" .. " " .. "B"`
26	a) `^`
27	b) Right-to-left
28	a) `or`
29	b) `a + (b * c)`
30	a) Arithmetic > Relational > Logical

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