Prueba técnica de

JAVA DEVELOPER

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First Name

Last Name

What does the INSERT statement do?

INSERT statement adds one or more records to a table

INSERT statement updates one or more records to a table

The INSERT statement edits one or more records to a table

The INSERT statement deletes one or more records from a table.

None

It is a generic template for a set of objects with similar characteristics.

Method

Functions

Class

Objects

None

Which of the following series will be printed by the given pseudocode?

7 10 15

7 18 14

7 14 10

7 7 7

None

The SET clause is used in which of the following SQL statements?

SELECT

DROP

UPDATE

DEELTE

None

What is the correct definition of an abstract class?

The ability to call different functions with the same name.

Bring together all the elements that can be considered as belonging to the same entity.

Allows you to define new classes based on existing ones in order to reuse code.

They are characterized in that at least one of their methods must be declared abstract, which has no implementation, and the behavior of these methods is defined by the concrete classes that inherit it.

None

What Design Patterns category is Abstract Factory in?

Creational

Behavioural

Graps

Structural

None

Search in Rotated Sorted Array

There is an integer array nums sorted in ascending order (with distinct values). Prior to being passed to your function, nums is possibly rotated at an unknown pivot index k (1 <= k < nums.length) such that the resulting array is [nums[k], nums[k+1], …, nums[n-1], nums[0], nums[1], …, nums[k-1]] (0-indexed). For example, [0,1,2,4,5,6,7] might be rotated at pivot index 3 and become [4,5,6,7,0,1,2].
Given the array nums after the possible rotation and an integer target, return the index of target if it is in nums, or -1 if it is not in nums. You must write an algorithm with O(log n) runtime complexity.

Example 1:
Input: nums = [4,5,6,7,0,1,2], target = 0
Output: 4

Example 2:
Input: nums = [4,5,6,7,0,1,2], target = 3
Output: -1

Example 3:
Input: nums = [1], target = 0
Output: -1

None

Suppose you have a functional interface called Calculator with a single abstract method called performOperation, which takes two numbers and returns a result. Below is the interface:

Now, consider the following MathOperations class that implements the Calculator interface:

Now, how could you use the MathOperations interface
Options: Calculator and class

to calculate the multiplication of 3.5 and 2.0?

None

Given the following array of integers in Java:

After applying the sorting algorithm Arrays.sort(numbers);, what will be the content of the numbers array?

{3, 1, 4, 5, 8}

{8, 5, 4, 3, 1}

{1, 4, 3, 5, 8}

{1, 3, 4, 5, 8}

None

10.

Search Insert Position

Given a sorted array of distinct integers and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in order.

You must write an algorithm with O(log n) runtime complexity.

Example 1:
Input: nums = [1,3,5,6], target = 5
Output: 2

Example 2:
Input: nums = [1,3,5,6], target = 2
Output: 1

Example 3:
Input: nums = [1,3,5,6], target = 7
Output: 4

None

11.

What result will the following code show?

None

12.

Find First and Last Position of Element in Sorted Array

Given an array of integers nums sorted in non-decreasing order, find the starting and ending position of a given target value.
If target is not found in the array, return [-1, -1]. You must write an algorithm with O(log n) runtime complexity.

Example 1:
Input: nums = [5,7,7,8,8,10], target = 8
Output: [3,4]

Example 2:
Input: nums = [5,7,7,8,8,10], target = 6
Output: [-1,-1]

Example 3:
Input: nums = [], target = 0
Output: [-1,-1]

Find First and Last Position of Element in Sorted Array

None

13.

Within a set of objects there are different forms and ways of doing things:

Inheritance

Abstraction

Polymorphism

Overwrite

None

14.

What result will the following code show?

[27,39,50]

[14,29,38]

Error[15,27,39]

[40,50,39]

None

15.

What is the correct definition of table in database?

Are attributes

An object data in a database is a Table

A field is a Table in database

Is a set of data organized in the form of rows and columns

None

16.

Which of the following series will be printed by the given pseudocode?

1 1 2 3 5

2 4 6 8 9

1 3 6 10 15

1 2 3 4 5 6

None

17.

Which SOLID principle is this code violating?

Single Responsibility

Liskov Substitution

Open / Closed

Interface Segregation

None

18.

It is considered as the main field of a table in the database:

1ST NORMAL FORM

PRIMARY KEY

UNIQUE DATA

FOREIGN KEY

None

19.

What are DML statements?

DROP, SELECT, UPDATE,DESTROY

SELECT, UPDATE, DELETE, INSERT

DESCRIBE, MODEL, ALTER

GRANT, REVOKE, VIEW, CREATE

None

20.

What will be the output of the following pseudocode?

7 18 14

7 14 10

7 7 7

7 10 15

None

Time’s up