MCQOPTIONS
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MCQOPTIONS
This section includes 30 Mcqs, each offering curated multiple-choice questions to sharpen your Accenture knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Assume the following method is properly synchronized and called from a thread A on an object B: wait(2000); After calling this method, when will the thread A become a candidate to get another turn at the CPU? |
| A. | After thread A is notified, or after two seconds. |
| B. | After the lock on B is released, or after two seconds. |
| C. | Two seconds after thread A is notified. |
| D. | Two seconds after lock B is released. |
| Answer» B. After the lock on B is released, or after two seconds. | |
| 2. |
Which will contain the body of the thread? |
| A. | run(); |
| B. | start(); |
| C. | stop(); |
| D. | main(); |
| Answer» B. start(); | |
| 3. |
Which method must be defined by a class implementing the java.lang.Runnable interface? |
| A. | void run() |
| B. | public void run() |
| C. | public void start() |
| D. | void run(int priority) |
| Answer» C. public void start() | |
| 4. |
Which of the following will directly stop the execution of a Thread? |
| A. | wait() |
| B. | notify() |
| C. | notifyall() |
| D. | exits synchronized code |
| Answer» B. notify() | |
| 5. |
Which cannot directly cause a thread to stop executing? |
| A. | Calling the SetPriority() method on a Thread object. |
| B. | Calling the wait() method on an object. |
| C. | Calling notify() method on an object. |
| D. | Calling read() method on an InputStream object. |
| Answer» D. Calling read() method on an InputStream object. | |
| 6. |
What is the name of the method used to start a thread execution? |
| A. | init(); |
| B. | start(); |
| C. | run(); |
| D. | resume(); |
| Answer» C. run(); | |
| 7. |
What is the numerical range of char? |
| A. | 0 to 32767 |
| B. | 0 to 65535 |
| C. | -256 to 255 |
| D. | -32768 to 32767 |
| Answer» C. -256 to 255 | |
| 8. |
Which is valid declaration of a float? |
| A. | float f = 1F; |
| B. | float f = 1.0; |
| C. | float f = "1"; |
| D. | float f = 1.0d; |
| Answer» B. float f = 1.0; | |
| 9. |
Which collection class allows you to access its elements by associating a key with an element's value, and provides synchronization? |
| A. | java.util.SortedMap |
| B. | java.util.TreeMap |
| C. | java.util.TreeSet |
| D. | java.util.Hashtable |
| Answer» E. | |
| 10. |
Which collection class allows you to associate its elements with key values, and allows you to retrieve objects in FIFO (first-in, first-out) sequence? |
| A. | java.util.ArrayList |
| B. | java.util.LinkedHashMap |
| C. | java.util.HashMap |
| D. | java.util.TreeMap |
| Answer» C. java.util.HashMap | |
| 11. |
Which interface provides the capability to store objects using a key-value pair? |
| A. | Java.util.Map |
| B. | Java.util.Set |
| C. | Java.util.List |
| D. | Java.util.Collection |
| Answer» B. Java.util.Set | |
| 12. |
Which interface does java.util.Hashtable implement? |
| A. | Java.util.Map |
| B. | Java.util.List |
| C. | Java.util.HashTable |
| D. | Java.util.Collection |
| Answer» B. Java.util.List | |
| 13. |
You need to store elements in a collection that guarantees that no duplicates are stored and all elements can be accessed in natural order. Which interface provides that capability? |
| A. | java.util.Map |
| B. | java.util.Set |
| C. | java.util.List |
| D. | java.util.Collection |
| Answer» C. java.util.List | |
| 14. |
Which collection class allows you to grow or shrink its size and provides indexed access to its elements, but whose methods are not synchronized? |
| A. | java.util.HashSet |
| B. | java.util.LinkedHashSet |
| C. | java.util.List |
| D. | java.util.ArrayList |
| Answer» E. | |
| 15. |
Which class does not override the equals() and hashCode() methods, inheriting them directly from class Object? |
| A. | java.lang.String |
| B. | java.lang.Double |
| C. | java.lang.StringBuffer |
| D. | java.lang.Character |
| Answer» D. java.lang.Character | |
| 16. |
Suppose that you would like to create an instance of a new Map that has an iteration order that is the same as the iteration order of an existing instance of a Map. Which concrete implementation of the Map interface should be used for the new instance? |
| A. | TreeMap |
| B. | HashMap |
| C. | LinkedHashMap |
| D. | The answer depends on the implementation of the existing instance. |
| Answer» D. The answer depends on the implementation of the existing instance. | |
| 17. |
public class Test { } What is the prototype of the default constructor? |
| A. | Test( ) |
| B. | Test(void) |
| C. | public Test( ) |
| D. | public Test(void) |
| Answer» D. public Test(void) | |
| 18. |
You want subclasses in any package to have access to members of a superclass. Which is the most restrictive access that accomplishes this objective? |
| A. | public |
| B. | private |
| C. | protected |
| D. | transient |
| Answer» D. transient | |
| 19. |
Which is a valid declaration within an interface? |
| A. | public static short stop = 23; |
| B. | protected short stop = 23; |
| C. | transient short stop = 23; |
| D. | final void madness(short stop); |
| Answer» B. protected short stop = 23; | |
| 20. |
Given a method in a protected class, what access modifier do you use to restrict access to that method to only the other members of the same class? |
| A. | final |
| B. | static |
| C. | private |
| D. | protected |
| E. | volatile |
| Answer» D. protected | |
| 21. |
Which of the following class level (nonlocal) variable declarations will not compile? |
| A. | protected int a; |
| B. | transient int b = 3; |
| C. | private synchronized int e; |
| D. | volatile int d; |
| Answer» D. volatile int d; | |
| 22. |
Which one creates an instance of an array? |
| A. | int[ ] ia = new int[15]; |
| B. | float fa = new float[20]; |
| C. | char[ ] ca = "Some String"; |
| D. | int ia[ ] [ ] = { 4, 5, 6 }, { 1,2,3 }; |
| Answer» B. float fa = new float[20]; | |
| 23. |
You want a class to have access to members of another class in the same package. Which is the most restrictive access that accomplishes this objective? |
| A. | public |
| B. | private |
| C. | protected |
| D. | default access |
| Answer» E. | |
| 24. |
Which cause a compiler error? |
| A. | int[ ] scores = {3, 5, 7}; |
| B. | int [ ][ ] scores = {2,7,6}, {9,3,45}; |
| C. | String cats[ ] = {"Fluffy", "Spot", "Zeus"}; |
| D. | boolean results[ ] = new boolean [] {true, false, true}; |
| E. | Integer results[ ] = {new Integer(3), new Integer(5), new Integer(8)}; |
| Answer» C. String cats[ ] = {"Fluffy", "Spot", "Zeus"}; | |
| 25. |
What is the most restrictive access modifier that will allow members of one class to have access to members of another class in the same package? |
| A. | public |
| B. | abstract |
| C. | protected |
| D. | synchronized |
| E. | default access |
| Answer» F. | |
| 26. |
What is the value of "d" after this line of code has been executed? double d = Math.round ( 2.5 + Math.random() ); |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 2.5 |
| Answer» C. 4 | |
| 27. |
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); |
| Answer» B. int b = Math.abs(5.0); | |
| 28. |
Which constructs an anonymous inner class instance? |
| A. | Runnable r = new Runnable() { }; |
| B. | Runnable r = new Runnable(public void run() { }); |
| C. | Runnable r = new Runnable { public void run(){}}; |
| D. | System.out.println(new Runnable() {public void run() { }}); |
| Answer» E. | |
| 29. |
Which statement is true about a static nested class? |
| A. | You must have a reference to an instance of the enclosing class in order to instantiate it. |
| B. | It does not have access to nonstatic members of the enclosing class. |
| C. | Its variables and methods must be static. |
| D. | It must extend the enclosing class. |
| Answer» C. Its variables and methods must be static. | |
| 30. |
Which is true about a method-local inner class? |
| A. | It must be marked final. |
| B. | It can be marked abstract. |
| C. | It can be marked public. |
| D. | It can be marked static. |
| Answer» C. It can be marked public. | |