Which of the following will not produce a compiler error?
a) Changing the value of a constant after it is declared.
b) Changing the value at a given index of an array after it’s created.
c) Using a final variable before it is initialized.
d) All of the above will produce compiler errors.
b) Changing the value at a given index of an array after it’s created.
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Consider a class that uses the following variables to implement an array-based stack:
``` String [] s = new String[100]; int top = -1; // Note top == -1 indicates stack is empty ``` a method that implements a void push(String x) operation can be written as A) if (top == s.length-1) throw new RuntimeException("Overflow"); top++; s[top] = x; B) if (top == s.length) throw new RuntimeException("Overflow"); top++; s[top] = x; C) if (top == s.length-1) throw new RuntimeException("Overflow"); s[top] = x; top++; D) if (top == s.length) throw new RuntimeException("Overflow"); s[top] = x; top++;
Give an example of an unsafe state and show how all of the processes could complete without a deadlock occurring.
What will be an ideal response?
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Indicate whether the statement is true or false
Which of the following was a new Android 3.0 developer feature:
a. fragments, which describe portions of an app’s user interface and can be combined into one screen or used across multiple screens. b. a persistent Action Bar at the top of the screen providing users with options for interacting with apps. c. ability to use multicore processor architectures for enhanced performance d. All of the above.