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EDITx is an open IT Library of questions to share and gain knowledge. Become an EDITx author because you care: share your knowledge to fit everyone benefit with a quality IT education.

What you get...

As contributor of the IT library, you allow others to use your questions, in the same way you can make use of theirs. Nevertheless, you keep the intellectual property on your work and will be notified any time that an author is using your questions or when someone answers your questions. Moreover, your privileged status allows you to set up private and public tests, to share your questions with your students, friends, colleagues or acquaintances and to get the results in real time.

... is what you give !

To become an EDITx Author, you just need to set up 5 QCM questions, in the field of your choice, and indicate the right answer. If your questions allows a better "Education in IT for X", you will receive the status and advantages of an EDITx Author.

Post date Author Category Question Stats
26.03.2018
Peter Lawrey
Java Champion, Blogger, Speaker & CEO at Higher Frequency Trading Ltd
Java

One of these lines won't compile. Which one?

616 answers
347 good - 269 bad
 
26.03.2018
Peter Lawrey
Java Champion, Blogger, Speaker & CEO at Higher Frequency Trading Ltd
Java

If x is an int type which of these expressions cannot be negative?

838 answers
628 good - 210 bad
 
26.03.2018
Peter Lawrey
Java Champion, Blogger, Speaker & CEO at Higher Frequency Trading Ltd
Java

You can write

492 answers
485 good - 7 bad
 
05.04.2018
Peter Lawrey
Java Champion, Blogger, Speaker & CEO at Higher Frequency Trading Ltd
Java

x != -x is false for which type/value?

139 answers
8 good - 131 bad
 
26.03.2018
Peter Lawrey
Java Champion, Blogger, Speaker & CEO at Higher Frequency Trading Ltd
Java
String s = null;
int i = 0;
try {
    for (i = 1; i <= 64; i++) {
941 answers
394 good - 547 bad
 
05.04.2018
Peter Lawrey
Java Champion, Blogger, Speaker & CEO at Higher Frequency Trading Ltd
Java

The following statement:

142 answers
48 good - 94 bad
 
26.03.2018
Peter Lawrey
Java Champion, Blogger, Speaker & CEO at Higher Frequency Trading Ltd
Java

The following:

137 answers
88 good - 49 bad
 
26.03.2018
Peter Lawrey
Java Champion, Blogger, Speaker & CEO at Higher Frequency Trading Ltd
Java

The following prints

540 answers
94 good - 446 bad
 
26.03.2018
Peter Lawrey
Java Champion, Blogger, Speaker & CEO at Higher Frequency Trading Ltd
Java

The following

817 answers
203 good - 614 bad
 
26.03.2018
Peter Lawrey
Java Champion, Blogger, Speaker & CEO at Higher Frequency Trading Ltd
Java

You can write

Class clazz = void.class;

430 answers
345 good - 85 bad
 
26.03.2018
Peter Lawrey
Java Champion, Blogger, Speaker & CEO at Higher Frequency Trading Ltd
Java

If you define a field in an interface e.g.

495 answers
135 good - 360 bad
 
26.03.2018
Peter Lawrey
Java Champion, Blogger, Speaker & CEO at Higher Frequency Trading Ltd
Java

Creating this array

225 answers
197 good - 28 bad
 
26.03.2018
Peter Lawrey
Java Champion, Blogger, Speaker & CEO at Higher Frequency Trading Ltd
Java

You can write

synchronized (new int[0]) { }

however you shouldn't because

398 answers
58 good - 340 bad
 
09.04.2018
Peter Lawrey
Java Champion, Blogger, Speaker & CEO at Higher Frequency Trading Ltd
Java

Which of the line A,B,C,D doesn't compile?

130 answers
14 good - 116 bad