QUIZ ON : JAVA - USING LIBRARY CLASSES

It is possible to find the square root of a number using the Math.pow() function. It is possible to find the square root of a number using the Math.pow() function.

Which among the following methods return a true or a false? Which among the following methods return a true or a false?

Which among the following class do not belong to the java.lang package? Which among the following class do not belong to the java.lang package?

Math.max( ) returns the number having maximum number of digits. Math.max( ) returns the number having maximum number of digits.

Which among the following function is used to check whether a given character is a tab space or not? Which among the following function is used to check whether a given character is a tab space or not?

Which among the following will yield -1 for negative number and 1 for positive number for a number stored in a variable a? Which among the following will yield -1 for negative number and 1 for positive number for a number stored in a variable a?

Math.random( ) returns a random number between 0 and 1 in decimal. Math.random( ) returns a random number between 0 and 1 in decimal.

Which among the following expression will return a random integer between 5 and 10 both inclusive? Which among the following expression will return a random integer between 5 and 10 both inclusive?

If s=“123”, which among the following will convert it to an integer? If s=“123”, which among the following will convert it to an integer?

Which among the following gives the next mathematical integer? Which among the following gives the next mathematical integer?

The member ‘out’ object of the ‘System’ class belongs to which class? The member ‘out’ object of the ‘System’ class belongs to which class?

Which among the following package is imported by default: Which among the following package is imported by default:

Math.sqrt() function is used to find the square of a number. Math.sqrt() function is used to find the square of a number.

Math. rint(12.5) will return 12.0. Math. rint(12.5) will return 12.0.

Which among the following function is equivalent to Math.sqrt(a)? Which among the following function is equivalent to Math.sqrt(a)?

Which among the following function returns the absolute value of a number? Which among the following function returns the absolute value of a number?

Which of the following is valid method of initialising? Which of the following is valid method of initialising?

Which among the following is valid character initialisation? Which among the following is valid character initialisation?

NaN stands for Not a Number, which is received when you pass a negative number to the Math.sqrt() function. NaN stands for Not a Number, which is received when you pass a negative number to the Math.sqrt() function.

Which class is inherited by the Character and Boolean wrapper classes? Which class is inherited by the Character and Boolean wrapper classes?

Math.abs() function is used to round off a real number to the nearest integer. Math.abs() function is used to round off a real number to the nearest integer.

Which of the following is not a wrapper class? Which of the following is not a wrapper class?

Math.round() function returns an int value if the parameter is float data type and long value if the parameter is of double data type. Math.round() function returns an int value if the parameter is float data type and long value if the parameter is of double data type.

Math.ceil() and Math.floor() are same. Math.ceil() and Math.floor() are same.

What package is a part of the wrapper class which is imported by default into all Java programs? What package is a part of the wrapper class which is imported by default into all Java programs?

What is the return type of Math.min(1,2.0f)? What is the return type of Math.min(1,2.0f)?

What is, converting a primitive value into an object of the corresponding wrapper class called? What is, converting a primitive value into an object of the corresponding wrapper class called?

Which among the following Scanner methods allows us to input a number with a decimal point? Which among the following Scanner methods allows us to input a number with a decimal point?

You cannot find the cube root of a number in Java. You cannot find the cube root of a number in Java.

What value will Math.sqrt(-9) return? What value will Math.sqrt(-9) return?

What value will Math.sqrt(Math.ceil(8.1)) return? What value will Math.sqrt(Math.ceil(8.1)) return?