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Basic Programming skills quiz

Which of the following is NOT a valid variable name?

Test_2

Num1

25_char

Which of the following is not a valid array declaration

Int[] array = new int[5]

Int[] array = {3, 6, 1, 6 , 2, 6}

String[] array = new String[3 + 6]

String[] array = new String{20}

Which of the following values cannot be assigned to a double variable

5 * 3

2 + 7.9

"50"

Which of the following makes the String value of "Hello world!"

"Hello" + "world!"

"Hello + world!"

"Hello " + "world!"

"Hell + oworld!"

Which of the following is would result in an error

For(int I = 0; I < 4)

For(String str : stringArray)

While(num != 5);

Do{ }while(num > 4);

Which of the following is not a valid value for a boolean variable in java

True

False

Null

Nothing

Assume int j = 5, which of the following makes k as 10

Int k = j + ++j - 1

Int k = j + j++ - 2

Int k = j + j - 2

Int k = j + j * 0 + 6

Which of the following would be suitable to assign grade to a mark

Switch statements

Multiple if...else

Nested multiple if...else

While loop

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