1845938
Frage 1
Frage
You find the following code in a file called Quiz.java
public class Question1{
public static void main(String[] args){
System.out.println("Code reached this point");
}
}
Does the code run?
Antworten
-
No
-
Yes
Frage 2
Frage
Given the following block of code.
public class Run {
public Run(){
run_for_me(new Runnable(){
public void run(){
System.out.println("Running");
}
});
}
public static void main(String[] args){
new Run();
}
public void run_for_me(Runnable run){
run.run();
}
}
What gets printed on the console? (Note: The code might not be syntactically correct)
Antworten
-
nothing
-
"Running"
-
Syntax error
Frage 3
Frage
Given the following code
public class Run{
public static void main(String[] args){
System.out.println(1 << 1);
}
}
What gets returned (if anything does)
Antworten
-
1
-
2
-
0001
-
Syntax Error
-
Nothing
-
true
Frage 4
Frage
Given the following code:
public class Run{
public static void main(String[] args){
int a = 1 + run();
System.out.println(a);
}
public int run(){
return 1;
}
}
What does the last line of code print?
Antworten
-
2
-
1
-
Syntax error
Frage 5
Frage
Given the following code:
public class Run{
private static final int ARRAY_SIZE = 12;
public Run(){
ARRAY_SIZE += 1;
int h = ARRAY_SIZE + 2;
}
}
What is the value of h
Antworten
-
14
-
12
-
Syntax error
-
15
Frage 6
Frage
In parallel & concurrent software final state is a must
Antworten
-
Yes
-
No
Frage 7
Frage
Which of the following blocks of code represent recursion?
Antworten
-
public class Run{ public Run(){ recurse(1); } public int recurse(int n){ if(n == 10){ return 10; }else{ recurse(n+1); } return 0; } }
-
public class Run{ private int a = 0; public Run(){ recurse(2); } public void recurse(int n){ a = n; } }
Frage 8
Frage
In parallel execution where memory is shared (and code "buggy") given the following piece of code
async { x = x + 1 }
async { x = x * 2 }
What are the possible values of x?
NOTE ( "async is not a valid call in Java however think of it as the two statements being run in parallel ).
Antworten
-
2,1
-
2,1,0
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