Matlab Relational & Logical Operations Quiz

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40 questions on MATLAB's comparison and logical operators, covering equality, inequality, boolean logic, and common pitfalls.

40 Questions

~80 minutes

Question 1

Which operator checks if two values are equal?

===

Question 2

What is the result of `5 > 3`?

logical 1 (true)

logical 0 (false)

Error

Question 3

Which operator means 'not equal to'?

!==

Question 4

What is the primary difference between `=` and `==`?

`=` assigns a value; `==` compares values

`==` assigns a value; `=` compares values

They are interchangeable

`=` is for numbers; `==` is for strings

Question 5

Which symbol represents the logical AND operator (element-wise)?

and

Question 6

What is the result of `true | false`?

logical 1

logical 0

NaN

Error

Question 7

What does the expression `~(5 > 10)` evaluate to?

logical 1

logical 0

-1

Error

Question 8

If `A = [1 0 1]` and `B = [0 1 1]`, what is `A & B`?

[0 0 1]

[1 1 1]

[1 0 0]

[0 1 0]

Question 9

Which operator represents 'greater than or equal to'?

≥

Question 10

What is the data type of the result of a relational operation?

logical

double

char

integer

Question 11

What is the result of `NaN == NaN`?

logical 0 (false)

logical 1 (true)

NaN

Error

Question 12

Which function returns true if *any* element in a vector is non-zero (true)?

any(v)

all(v)

some(v)

exists(v)

Question 13

What does `3 < 5 < 4` evaluate to in MATLAB?

logical 1 (true)

logical 0 (false)

Error

It depends on x

Question 14

Which operator is the 'Short-Circuit AND'?

and

short(and)

Question 15

How do you check if two arrays `A` and `B` are identical in size and content?

isequal(A, B)

A == B

A = B

same(A, B)

Question 16

What is the result of `xor(true, true)`?

logical 0

logical 1

Error

Question 17

Which function checks if a value is infinite?

isinf(x)

isnan(x)

infinite(x)

checkinf(x)

Question 18

If `v = [10 20 30]`, what does `v > 15` return?

[0 1 1]

[10 20 30]

[20 30]

logical 1

Question 19

How do you convert a numeric array `A` to logicals (0 becomes false, non-zero becomes true)?

logical(A)

bool(A)

boolean(A)

toLogical(A)

Question 20

What is the correct way to check if `x` is between 1 and 10 (inclusive)?

x >= 1 & x <= 10

1 <= x <= 10

x >= 1 and x <= 10

between(x, 1, 10)

Question 21

What does `~[0 1 0]` result in?

[1 0 1]

[0 1 0]

[-1 0 -1]

Error

Question 22

Which operator has the highest precedence?

Arithmetic (e.g., + *)

Relational (e.g., > <)

Logical AND (&)

Logical OR (|)

Question 23

What is the result of `strcmp('apple', 'apple')`?

logical 1

logical 0

[1 1 1 1 1]

True

Question 24

Why is comparing floating point numbers with `==` dangerous (e.g., `0.1 + 0.2 == 0.3`)?

Floating point precision errors can make them slightly different

MATLAB cannot compare floats

It causes a syntax error

It rounds them to integers first

Question 25

What does `all([1 1 0])` return?

logical 0

logical 1

NaN

Question 26

Which keyword represents the logical value 'true'?

true

True

TRUE

Question 27

What is the result of `1 | 0 & 0`?

Error

NaN

Question 28

How do you find the indices of all elements in `v` that are greater than 5?

find(v > 5)

index(v > 5)

search(v > 5)

where(v > 5)

Question 29

What happens if you use `&&` on arrays (e.g., `[1 0] && [0 1]`)?

Error

[0 0]

Question 30

What is the logical negation of `x > 5`?

x <= 5

x < 5

x >= 5

x == 5

Question 31

Which function allows you to compare two strings case-insensitively?

strcmpi

strcmp

strequal

ignorecase

Question 32

What is the result of `logical(5)`?

logical 1

logical 5

Error

logical 0

Question 33

If `A` is a logical array, how do you convert it back to 1s and 0s of type double?

double(A)

num(A)

int(A)

value(A)

Question 34

What does `isempty([])` return?

logical 1

logical 0

Error

NaN

Question 35

Can you use logical arrays to index into other arrays?

Yes, it extracts elements where the logical index is true

No, indices must be integers

Only if they are the same size

Yes, but it returns 0s

Question 36

What is the result of `false < true`?

logical 1

logical 0

Error

NaN

Question 37

Which operator is used for 'Element-wise OR'?

Question 38

What does `bitand(5, 3)` do?

Performs bitwise AND on the binary representations

Performs logical AND

Adds the numbers

Checks if both are non-zero

Question 39

If `x = 5`, what is `x ~= 5`?

logical 0

logical 1

Error

NaN

Question 40

What is the result of `any([0 0 0])`?

logical 0

logical 1

NaN

Error

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Matlab Relational & Logical Operations Quiz

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Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10

Question 11

Question 12

Question 13

Question 14

Question 15

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Question 24

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Question 28

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Question 30

Question 31

Question 32

Question 33

Question 34

Question 35

Question 36

Question 37

Question 38

Question 39

Question 40

About This Relational & Logical Quiz

What You Will Practise

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File I/O & Data Importing

Logical Indexing & Masking

Vectorization & Performance Optimization

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Functions

Basic Plot Commands

Input & Output

Relational & Logical Operations

Arrays vs. Matrices