Learn Java: Object
Topics: All about Object'
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What is the value of "d" after this line of code has been executed?double d = Math.round ( 2.5 + Math.random( )); What is the value of "d" after this line of code has been executed?double d = Math.round ( 2.5 + Math.random( ));A. 2B. 3C. 4D. 2.5
Which of the following would compile without error?A. int a = Math.abs(-5);B. int b = Math.abs(5.0);C. int c = Math.abs(5.5F);D. int d = Math.abs(5L);
Which of the following are valid calls to Math.max? Math.max(1,4) Math.max(2.3, 5) Math.max(1, 3, 5, 7) Math.max(-1.5, -2.8f)A. 1, 2 and 4B. 2, 3 and 4C. 1, 2 and 3D. 2, 3 and 4
public class Myfile { public static void main (String[] args) { String biz = args[1]; String baz = args[2]; String rip = args[3]; System.out.println("Arg is " + rip); } }Select how you would start the program to cause it to print: Arg is 2A. java Myfile 222B. java Myfile 1 2 2 3 4C. java Myfile 1 3 2 2D. java Myfile 0 1 2 3
What will be the output of the program?String x = new String("xyz");String y = "abc";x = x + y;How many String objects have been created?A. 2B. 3C. 4D. 5
What will be the output of the program?public class Example { public static void main(String [] args) { double values[] = {-2.3, -1.0, 0.25, 4}; int cnt = 0; for (int x=0; x < values.length; x++) { if (Math.round(values[x] + .5) == Math.ceil(values[x])) { ++cnt; } } System.out.println("same results " + cnt + " time(s)"); }}A. same results 0 time(s)B. same results 2 time(s)C. same results 4 time(s)D. Compilation fails.
What is the base class of all classes?
What do you think is the logic behind having a single base class for all classes?
Why most of the Thread functionality is specified in Object Class?
What is the importance of == and equals () method with respect to String object?
Is String a Wrapper Class or not?
How will you find length of a String object?
How many objects are in the memory after the exection of following code segment?
What is the difference between an object and object reference?
What will trim () method of String class do?
What is the use of java.lang.Class class?
What is the possible runtime exception thrown by substring () method?
What is the difference between String and String Buffer?
What is the use of Math class?
Can you instantiate Math class?
What will Math. abs () do?
What will Math. ceil () do?
What will Math. floor () do?
What will Math. ax () do?
What will Math. in() do?
What will Math. Random () do?
