Class 12

Which prebuilt class, from the java.util package, is commonly used to take user input from the console?

Which Scanner method reads the next token from the input stream and returns it as a String?

Which static method of the Integer class converts a String to its integer equivalent?

Which class (from java.util) provides prebuilt methods like sort() and binarySearch() for manipulating arrays?

What must be true about an array BEFORE using Arrays.binarySearch() on it?

What does Arrays.binarySearch() return if the key element is NOT found in the array?

Which String class method converts all characters of a string to uppercase?

For myString = "Hello World", what does myString.charAt(6) return?

For myString = "Hello World", what does myString.length() return?

Which String method checks if a string contains a given substring, returning true/false?

Which String method compares two strings for equality WITHOUT considering case sensitivity?

For myString = "Hello World", what does myString.replace('l','*') return?

Once the Arrays class has sorted an array, the sort is applied in ascending order by default using Arrays.sort().

The Integer class and its parseInt() method must be manually imported using the import statement, similar to the Scanner class.

Write the two lines of code needed to create a Scanner object that reads from the console and stores a name entered by the user.

Data that has not been processed to reveal useful meaning is called:

Write Java code to declare an array of 5 doubles with values {103, 144, 256.5, 346, 387.5}, sort it using the Arrays class, and then print the lowest and highest marks.

Which of the following best describes 'Information'?

An unexpected error situation during program execution that causes it to terminate abnormally is called:

Which of the following is NOT a property of a database?