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Core Java Online Test – Java 8
Clock
Test duration:
20
min
Notes
No. of questions:
10
Tie
Level of experience:
Expert

Core Java Online Test

Our Core Java online test is ideal for technical recruiters & hiring managers to hire job-fit candidates for the role of Core Java Developers. This pre-employment test evaluates candidates’ knowledge on Core Java 8, Exception handling, OOPs, Lambda function, and JDBC. The Core Java assessment test can reduce time-to-hire by 45% by enabling employers to identify top talent early in the recruitment process.

15362
+
Candidates
Assessed
119
+
Organizations Served
Fujitsu
Paypal
Capgemini
Deloitte
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About

Core Java Online Test – Java 8

The Core Java online test for experienced candidates helps technical recruiters and hiring managers to effortlessly assess the technical knowledge of senior candidates in Core Java. The Java 8 online test is designed & validated by experienced Java experts to assess & hire Core Java developers as per industry standards.      

Why use iMocha’s core Java online test for experienced?

     Core Java online test helps employers in many ways including hiring job-fit experienced candidates within a short period, making unbiased employee performance appraisal decisions, and reducing hassles in mass recruitment. This AI-powered Java 8 assessment test reduces technical screening time by 85%.

Use iMocha's assessment to hire skill fit, remove bias, and save money!
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How it works

Test Summary

The Core Java assessment test helps to screen the candidates for the following:

1. Extensive experience in implementing object-oriented concepts.

2. The ability to use advanced class features like polymorphism, class overriding, and interfacing to develop efficient and reusable code.

3. Strong knowledge of Java 8 Lambda, Streams, Optional, and other functional interfaces.

Employers can use intelligent & powerful test Insights to identify job-fit candidates more accurately with the score distribution & section analysis features. Assessing candidates with a Core Java online assessment test is secure and reliable. 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 and webcam proctoring help detect cheating during the test.

The Java 8 online test is designed considering EEOC guidelines and helps assess & hire diverse talent without any bias.

The 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.&nbsp;</p>

Test Duration
20
No. of Questions
10
Level of Expertise
Expert
Useful for hiring
  • Core Java Developer
  • Core Java Programmer
  • Java Developer with 1-3 yrs of experience
Topics Covered
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Core Java 8

It includes a huge upgrade to the Java programming model and a coordinated evolution of the JVM, Java language, and libraries.

String data handling

In Java, a string is basically an object that represents a sequence of char values. An array of characters works the same as a Java string.
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Streamed API

The Stream API is used to process collections of objects.
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Lambda Function

Java lambda expressions are Java&
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JDBC

JDBC makes it possible to establish a connection with a data source, send queries and update statements, and process results.
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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:

Java 8 - Generics

Difficulty:

Hard

Question:

You have extracted an element from a list and cast it to a string A. What might be the result of this operation?


Options

  • An unchecked error might be thrown.
  • A ClassCastException is thrown.
  • A ClassErasureException is thrown.
  • An UnIdentifiedTypeCast error is thrown.
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FAQ
What is Data Science?
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.NET Design Pattern test helps recruiters to evaluate candidates' ability to work on GOF Decorator Design Pattern to solve recurring design problems and design flexible and reusable object-oriented software

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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What is Core Java?
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Core Java is the part of Java programming language which covers basic concepts of Java. Java Standard Edition (J2SE) is categorized as Core Java which is used to develop general-purpose applications. Core Java mainly covers concepts like OOPs concepts (Data Abstraction, Encapsulation, Inheritance, Polymorphism), Basic Java constructs like loops and data types, String handling, Collection framework, Multithreading, and Exception handling etc.

Why use iMocha's core Java online test
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iMocha's core Java online test helps recruiter & hiring managers to assess core Java programming skills of the candidates. Our test is designed to assess experienced candidates and help recruiters to:

  • Reduce hiring cost by 40% with automated Core Java test
  • Reduce technical screening time by 80%.
  • Take data driven hiring decisions with comprehensive and comparative reports of the assessments

What are the key skills that recruiter should look for while hiring core Java developer?
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You need to consider the key skills below while hiring Core Java developer:

Technical Skills:

  • Handling Exceptions
  • Multithreading
  • Class Fundamentals
  • Data Types
  • String handling

Soft Skills:

  • Interpersonal Skills
  • Work Ethics
  • Analytical Thinking
  • Good Communication
  • Learning concepts and using them solve problems

What are a few interview questions that recruiter/hiring manager should ask while hiring core Java developer?
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Here are few interview questions that you can ask to Java developers & predict their technical proficiency:

  • What are the features of Core JAVA?
  • What is Java virtual machine?
  • What is meant by the Local variable and the Instance variable
  • What are the main differences between the Java platform and other platforms?
  • What is platform independent feature in Java?
  • What is classloader?
  • What is Method Overriding in Core Java?
  • What do you mean by package in Core Java?
  • What is Externalizable interface?
  • What is Session Management in Core Java?

How do you assess the core Java skills?
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iMocha’ MCQ based core Java assessment includes over 500 questions with various topics like Java OOPs, string data handling, Lambda function, and streamed API which helps to assess practical knowledge of candidates. This helps to quantify core Java developer's skills and select the right candidate amongst all.

How do you conduct technical skills assessment?
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You can conduct remote technical skills assessments with 4 easy steps with iMocha:

  1. Select from 1000+ technical skills tests or Job role-based assessments from iMocha’s skill library. Ensure test integrity by adding cheating prevention measures like image, audio, video proctoring, and window lock, etc.
  2. Invite candidates through an email by sharing assessment link
  3. Get comprehensive and shareable reports upon completion of the online technical assessment
  4. Identify right candidates for further interviews