Java Module 4: Question Preview (ID: 27919)


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How would you assign the integer 5 to a variable named numberFive? Assume the variable is already declared
a) numberFive == 5; b) numberFive = 5; c) 5 = numberFive; d) numberFive := 5;
Which of the following is a valid Java variable?
a) 95miles b) numbers#text c) final d) _thisDog
Suppose x is 1. What is x after x += 2?
a) 1 b) 3 c) 4 d) -1
Which of the following contains a valid comment?
a) int twoPi = 2 * 3.14159; /* holds the value of two times pi */ b) int twoPi = 2 * 3.14159; /* holds the value of two times pi //* c) int twoPi = 2 * 3.14159; /*/ *holds the value of two times pi //* d) none of the above
To declare an int variable number with initial value 2, you write ___________
a) int number = 2L; b) integer number = 2; c) int number = 2.0; d) int number = 2;
The expression 4 + 20 / (3 - 1) * 2 is evaluated to ______________
a) 4 b) 24 c) 20 d) 9
25 % 1 is _____
a) 1 b) 2 c) 3 d) 0
Which of the following is the correct way to declare a variable?
a) int length width; b) int length, width c) int length; width; d) int length, int width;
What is the result of 45 / 4?
a) 10 b) 11 c) 11.25 d) 12
Which of the following expression results in a value 1?
a) 2 % 1 b) 15 % 4 c) 25 % 5 d) 37 % 6
To declare a constant MAX_LENGTH inside a method with value 99.98, you write
a) final MAX_LENGTH = 99.98; b) double MAX_LENGTH = 99.98; c) final double MAX_LENGTH = 99.98; d) none of the above
Which of the following is a correct name for variables according to Java camel case naming conventions?
a) FindArea b) findArea c) findarea d) FINDAREA
An int variable can hold:
a) 'x' b) 120.5 c) abc d) 120
In Java, which of the following is not a numerical type?
a) int b) char c) byte d) double
Before a variable is used it must be _______________
a) defined b) declared c) imported d) assigned
Which of the following is a valid identifier?
a) $total b) class c) 8+9 d) 9x
An identifier that cannot be used as a variable name is a ___________________ word
a) special b) reserved c) key d) long
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