Tag: programming languages

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Multiple choice technology programming languages

class TempClass { int i; public void TempClass(int j) { int i = j; } } public class C { public static void main(String[] args) { TempClass temp = new TempClass(2); } }

  1. The program has a compilation error because TempClass does not have a default constructor.

  2. The program has a compilation error because TempClass does not have a constructor with an int argument.

  3. The program compiles fine, but it does not run because class C is not public.

  4. The program compiles and runs fine.
Reveal answer Fill a bubble to check yourself
B Correct answer
Full explanation
Multiple choice technology programming languages

Analyze the following code. public class Test { int x; public Test(String t) { System.out.println("Test"); } public static void main(String[] args) { Test test = null; System.out.println(test.x); } }

  1. The program has a syntax error because test is not initialized.

  2. The program has a syntax error because x has not been initialized.

  3. The program has a syntax error because you cannot create an object from the class that defines the object.

  4. The program has a syntax error because Test does not have a default constructor.

  5. The program has a runtime NullPointerException because test is null while executing test.x.
Reveal answer Fill a bubble to check yourself
E Correct answer
Full explanation
Multiple choice technology programming languages

Analyze the following code: public class Test { public static void main(String[] args) { double radius; final double PI= 3.15169; double area = radius * radius * PI; System.out.println("Area is " + area); } }

  1. The program has syntax errors because the variable radius is not initialized.

  2. The program has a syntax error because a constant PI is defined inside a method.

  3. The program has no syntax errors but will get a runtime error because radius is not initialized.

  4. The program compiles and runs fine
Reveal answer Fill a bubble to check yourself
A Correct answer
Full explanation
Multiple choice technology programming languages

Analyze the following code. public class Test { int x; public Test(String t) { System.out.println("Test"); } public static void main(String[] args) { Test test = new Test(); System.out.println(test.x); } }

  1. The program has a syntax error because System.out.println method cannot be invoked from the constructor.

  2. The program has a syntax error because x has not been initialized.

  3. The program has a syntax error because you cannot create an object from the class that defines the object.

  4. The program has a syntax error because Test does not have a default constructor.
Reveal answer Fill a bubble to check yourself
D Correct answer
Full explanation