2018 Java Proficiency Test for Newcomers-Basics-
Introduction
This test is for ** those who have already learned the basics of Java **. (Mainly newcomers who have Java learning experience before joining the company or who have already learned in training after joining the company) ** It takes 15 minutes **.
Answers with explanations will be published at a later date.
Reference material "Introduction to Java that can be understood clearly 2nd edition" http://amzn.asia/6n0UuFx
Ability test
Q1 ** Q. Please execute the following process and select the appropriate result from the console output. ** **
** Answers **
- 3
- 3.0
- "3"
- 3.5
- 4.5
- No output due to compilation error
Q2 ** Q. Please execute the following process and select the appropriate result from the console output. ** **
** Answers **
- 1: true, 2: true, 3: true
- 1: false, 2: true, 3:true
- 1: true, 2: false, 3:true
- 1: true, 2: true, 3: false
- 1: false, 2: true, 3:false
Q3 ** Q. Please execute the following process and select the appropriate result from the console output. ** **
** Answers **
- Osaka and Tokyo
- Osaka, Tokyo
- Osaka, Tokyo and Fukui
- Osaka, Tokyo, Fukui
- Nothing is displayed
Q4 ** Q. Please execute the following process and select the appropriate result from the console output. ** **
** Answers **
- 0
- 20
- 25
- 30
Q5 ** Q. What are the names of arrows often used in IDEs (Eclipse, IntelliJ, etc.)? ** **
Q6 ** Q. Please answer the words that apply to the mosaic below (all the same words). * However, if a is 2 and b is 3, 23 will be the return value. ** **
Q7 ** Q. Please select the appropriate reason for class division. ** **
** Answers **
- It doesn't work unless it is divided into classes in the first place.
- To improve readability and make it easier to reuse and maintain
- To reduce readability and protect code confidentiality 4.1 Because the number of variables and methods that can be defined in a class is limited
Q8 ** Q. Please execute the following process and select the appropriate result from the console output. ** **
** Answers **
- 0
- 3
- 4
- 10
- 11
- 22
- 23
- 24
Q9 ** Q. What is the name of the arrow? ** **
** Answers **
- auto-boxing
- auto-unboxing
- cast
- strong type conversion
Q10 ** Q. Execute the following process and select the appropriate one in the last line output to the console. ** **
** Answers **
- The current consumption tax is 8.0%.
- The consumption tax is expected to be 10.0% in the future.
- No output due to compilation error
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