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Java Design Patterns Online Test
Clock
Test duration:
20
min
Notes
No. of questions:
10
Tie
Level of experience:
Entry Level/Mid/Senior

Java Design Patterns Test

iMocha's Java Design Patterns online test is the most preferred skills assessment for recruiters and hiring managers to assess candidates' design patterns skills. This assessment helps hire Java developers and can help reduce hiring time by 40%.

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About

Java Design Patterns Online Test

Design patterns represent the best practices used by experienced object-oriented software developers. Design patterns are solutions to general problems that software developers face during software development. These patterns are mainly created for the OOPs languages like Java. In Java Design Patterns, three main patterns are exclusively used by the developers, namely – Creational (Singleton Design Pattern), Structural (Decorator Design Pattern), and Behavioral (Command Design Pattern).  

Java Design Patterns online test helps tech recruiters and hiring managers to assess the candidate's design patterns programming skills. Java Design Patterns skills test is designed by experienced Subject Matter Experts (SME) to evaluate and hire Java developers as per industry standards.

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How it works

Test Summary

Java Design Patterns online test helps to screen the candidates who possess traits as follows: 

  

  • Strong experience with various patterns like Structural Patterns, Behavioral Patterns, Singleton Design Patterns, etc.
  • Good knowledge of channeling messages and delivering guaranteed mechanisms.
  • Good understanding of using JDK factory methods and transferring objects. 
  • Familiarity with other patterns used in Java, like Remote Proxy Design Pattern and DAO Pattern. 

Java Design Patterns online test is a secure and reliable way of candidate assessment. You can use our role-based access control feature to restrict system access based on the roles of individual users within the recruiting team. Features like window violation, image, audio & video proctoring help detect cheating during the test. 

 

This test may contain MCQs (Multiple Choice Questions), MAQs (Multiple Answer Questions), Fill in the Blanks, Whiteboard Questions, Audio / Video Questions, LogicBox (AI-based Pseudo-Coding Platform), Coding Simulators, True or False Questions, etc. 

Test Duration
20
No. of Questions
10
Level of Expertise
Entry Level/Mid/Senior
Useful for hiring
  • Java Developer
  • Software Engineer – Java
Topics Covered
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Structural Patterns

Java design patterns online test helps recruiters to assess candidates&

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Sample Question
Choose from our 100,000+ questions library or add your own questions to make powerful custom tests.

Question types :

Multiple Option

Topic:

Difficulty:

Hard


Q 1. You have been asked to train « Naive Bayes model for spam detection dataset

Using Python command, what wil you add in the given code at XXXX to deciore, it and train your modal for the given dataset?

import numpy os np

X= nporroyll 3. 2b[1 21 [2.21.[3,21)
Y= nporray(fi.a,a.1))

XXXX

from skinamnaive_bayas import

Gaussianna

otf = Gaussianne()

ceataie(x ¥)

from skinamnaive_bayas import

Gaussianna

otf = Gaussianne()

ceataie(x ¥)

from skinamnaive_bayas import

Gaussianna

otf = Gaussianne()

ceataie(x ¥)

from skinamnaive_bayas import

Gaussianna

otf = Gaussianne()

ceataie(x ¥)

Question types :

Multiple Option

Topic:

Machine teaming

Difficulty:

Hard


Q 1. Q2 Lets assume that you have 6 Pandas DataFrome(af) in the below tole.

Index Code Open High
0 AAPL 19877 70074
1 AAPL 19877 70074
2 AAPL 19877 70074
3 AAPL 19877 70074
4 AAPL 19877 70074

When the following commend is executed, what hoppens to the DatoFrome?

df= defiinat()
Y= nporray(fi.a,a.1))

Index Code Open High
0 AAPL 19877 70074
1 AAPL 19877 70074
2 AAPL 19877 70074
3 AAPL 19877 70074
4 AAPL 19877 70074
Index Code Open High
0 AAPL 19877 70074
1 AAPL 19877 70074
2 AAPL 19877 70074
3 AAPL 19877 70074
4 AAPL 19877 70074
it gives an error becouse of the third row which has on empty string.
None of these

Question types :

Multiple Option

Topic:

Structural Patterns

Difficulty:

Hard

Question:

As shown in the diagram, the client class has information about upper x and y, and lower x and y. This is all we need for displaying rectangles, but we have a legacy rectangles class that is displaying rectangles based on different parameters. We should not delete the legacy rectangle or change it since it is already in use. Which design pattern could help us based on this diagram?

Java_Design_Pattern_image


Options

  • Composite
  • Bridge
  • Adapter
  • Interpreter
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FAQ
What is Data Science?
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Why use iMocha’s online data science test?
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What are the key skills that recruiter should look for while hiring a Data Scientist?
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What are few interview questions that recruiter/hiring manager should ask while hiring a data scientist?
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How do you assess the data scientists?
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