FREE Mettl Coding Fundamentals and Logic Questions and Answers

Question 1

Which of the following statements accurately describes the primary characteristic of a Stack data structure?

Accepted Answer

Elements are inserted and removed from the same end, following a Last-In, First-Out (LIFO) principle.

Answer

It allows direct access to any element using an index.

Answer

Elements are processed in a First-In, First-Out (FIFO) order.

Answer

It stores key-value pairs for efficient lookup.

Question 2

Analyze the following pseudocode snippet. What is its time complexity in Big O notation, where 'N' is the size of the `data_array`?

```
FUNCTION process_data(data_array)
  FOR i FROM 0 TO N-1
    PRINT data_array[i]
  ENDFOR
ENDFUNCTION
```

Accepted Answer

O(N) - Linear time

Answer

O(N^2) - Quadratic time

Answer

O(1) - Constant time

Answer

O(log N) - Logarithmic time

Question 3

What will be the final value of the variable `counter` after the following pseudocode is executed?

```
SET counter = 0
SET i = 1
WHILE i <= 5
  IF i % 2 == 0 THEN
    counter = counter + i
  ENDIF
  i = i + 1
ENDWHILE
```

Accepted Answer

6

Answer

15

Answer

9

Answer

5

Question 4

A program has three boolean variables: `is_registered`, `has_paid`, and `is_admin`. Access is granted if a user is an admin, OR if they are registered AND have paid. Which boolean expression correctly represents this logic?

Accepted Answer

(is_registered AND has_paid) OR is_admin

Answer

is_registered AND (has_paid OR is_admin)

Answer

(is_registered OR has_paid) AND is_admin

Answer

is_registered OR (has_paid AND is_admin)

Question 5

Consider the following recursive function written in pseudocode. What is the result of calling `calculate(4)`?

```
FUNCTION calculate(n)
  IF n <= 1 THEN
    RETURN 1
  ELSE
    RETURN n + calculate(n - 1)
  ENDIF
ENDFUNCTION
```

Accepted Answer

10

Answer

24

Answer

9

Answer

4

Question 6

In the context of programming, what is the primary purpose of using a local variable inside a function?

Accepted Answer

To limit the variable's existence and accessibility to only within that function, preventing unintended side effects.

Answer

To share its value with all other functions in the program.

Answer

To retain its value even after the program has finished executing.

Answer

To declare a variable that is accessible from anywhere in the code.