1. Java is a... language. A. moderate typed B. strogly typed C. weakly typed D. none of these. Answer: B

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1. Java is a... language. A. moderate typed B. strogly typed C. weakly typed D. none of these 2. How many primitive data types are there in Java? A. 5 B. 6 C. 7 D. 8 3.

1 1. Java is a... language. A. moderate typed B. strogly typed C. weakly typed D. none of these 2. How many primitive data types are there in Java? A. 5 B. 6 C. 7 D In Java byte, short, int and long all of these are A. signed B. unsigned C. Both of the above D. None of these 4. Size of int in Java is A. 8 bit B. 16 bit C. 32 bit D. 64 bit 5. The smallest integer type is... and its size is... bits. A. short, 8 B. byte, 8 C. short, 16 D. short, Size of float and double in Java is A. 32 and 64 B. 64 and 64 C. 32 and 32 D. 64 and 32

2 7. Automatic type conversion in Java takes place when A. Two type are compatible and size of destination type is equal of source type. B. Two type are compatible and size of destination type is larger than source type. C. Two type are compatible and size of destination type is shorter than source type. D. All of the above 8. Which of the following automatic type conversion will be possible? A. byte to int B. short to int C. long to int D. int to long 9. The following fraction of code double STATIC = 2.5 ; System.out.println( STATIC ); A. Prints 2.5 B. Raises an exception C. Raises an error as STATIC is used as a variable which is a keyword D. None of these 10. What would be the output of the following fraction of code? int Integer = 34 ; char String = 'S' ; System.out.print( Integer ) ; System.out.print( String ) ; A. Does not compile as Integer and String are B. S API class names. C. 34 D. 34 S 11. The following program: public class Test{ static boolean is OK; public static void main(string args[]){system.out.print(is OK); } } A. Prints true B. Prints false

3 C. Will not compile as boolean is not initialized D. Will not compile as boolean can never be static 12. In Java, the word true is... A. A Boolean literal B. A Java keyword C. Same as value 0 D. Same as value What will the output of the following program? public class Test{ public static void main(string args[]){float f = (1 / 4) * 10; int i = Math.round(f); System.out.println(i); } } A. 0 B. 1 C. 2 D What is the output for the below code? public class Test{public static void main(string[] args){int i = 010; int j = 07;System.out.println(i); System.out.println(j); } } A. 7 8 B. 8 7 C. 9 8 D. None 15. What will be output of following program? public class Test{public static void main(string[] args){byte b=127; b++; b++; System.out.println(b); } } A. 127 B C. 129 D Which class cannot be subclassed (or extended) in java? A. Final class B. abstract class

4 C. parent class D. None of above 17. Why we use array as a parameter of main method A. Can store multiple values B. It is syntax C. Both of above D. None of above 18. Suspend thread can be revived by using A. yield() method B. Suspend() method C. start() method D. resume() method 19. Runnable is A. Interface B. Class C. Variable D. Method 20. Which collection class associates values witch keys, and orders the keys according to their natural order A. java.util.linkedlist B. java.util.treemap C. java.util.sortedset D. java.util.hashset 21. Which method is used to perform DML statements in JDBC A. executeupdate() B. executequery() C. execute() D. None of above

5 22. Which of the following below are valid isolation levels in J2EE A. TRANSACTION_READ_UNCOMMITTED B. TRANSACTION_SERIALIZABLE C. Only A D. Both A and B 23. Which metrhods are utilized to control the access to an object in multi threaded programming A. Synchronized methods B. Asynchronized methods C. Serialized methods D. None of above 24. Program which executes applet is known as A. JVM B. virtual machine C. applet engine D. None of above 25. Which statement is static and synchronized in JDBC API A. getconnection() B. executequery() C. preparecall() D. executeupdate() 26. The JDBC-ODBC bridge is A. Singlethreaded B. Multithreaded C. Both of above D. None of above 27. All raw data types should be read and uploaded to the database as an array of A. int B. byte C. char D. bollean

6 28. The class java.sql.timestamp is associated with A. java.util.date B. java.util.time C. java.sql.time D. None of above 29. Which of the following statements about arrays is syntactically wrong A. arrayname[] p = new arrayname[5]; B. arrayname p[][] = new arrayname[2][]; C. arrayname[] p []; D. arrayname p[5]; 30. Converting a primitive type data into its corresponding wrapper class object instance is called A. boxing B. wrapping C. autoboxing D. instantiation 31. Package of drawstring() method is A. java.awt B. javax.swing C. java.applet D. java.io 32. Which method executes only once A. stop() method B. start() method C. init() method D. destroy() method

7 33. Object which can store group of other objects is called A. Package B. Wrapper C. Java object D. Collection object 34. All collection classes are available in A. java.util package B. java.io package C. java.lang package D. java.awt package 35. Thread class is available in A. java.lang package B. java.util package C. java.awt package D. java.io package 36. Minimum threads in a program are A. 0 B. 1 C. 2 D JIT meaning A. just in time B. java in time C. join in time D. none of above 38. After the compilation of the java source code, which file is created by the JVM A..class B..doc C..java D..cdr

8 39. pow () is associated with which class A. Input stream class B. Object class C. Math class D. None of above 40. x=x+1 is equivalent to A. x++ B. ++x C. x=x-1 D. None of these 41. If method have same name as class name and method don t have any return type then it is known as A. Constructor B. Destructors C. Variable D. Object 42. Methods that have same name, but different Parameter list and different definition known as A. Overriding B. Overloading C. Constructor D. none of these 43. Inheritance means A. Sub class create object of super class B. Sub class extends Base class C. Sub class extends super class D. All of the above 44. Which type of inheritance is not supported by java

9 A. Single B. Mulilevel C. Hirarchical D. Multiple 45. String is the predefined A. Object B. Variable C. Class D. Method 46. Super is the predefined A. Method B. Keyword C. Keyword and Method D. None of above 47. Execution of the program is always begins with A. Main method B. parent class C. default package D. class contain main method 48. In java, gc() method is available in which package A. java.io package B. java.lang package C. java.awt package D. java.util package 49. JAR file contains the compressed version of A..java file B..jsp file C..class file D. None of above

10 50. Process of creating exact copy of the existing object is called A. overloading B. overriding C. cloning D. coping 51. Which is the predefined package A. Lang package B. util package C. io package D. All of above 52. Java intermediate code is known as A. Byte code B. First code C. Mid code D. None of above 53. Which command is used for interpretation of java program A. Java B. javap C. javac D. none of above 54. What is meaning of jar A. java array B. java architecture C. java archived D. none of these 55. Which of the following command is used to compile the Java program A. java B. javac C. javap D. none of these

11 56. What do you mean by javap A. java compiler B. java debugger C. java Interpreter D. java Disassemble 57. What is jdb A. java Disassemble B. java Interpreter C. java compiler D. java debugger 58. Java is known as stage language A. 1 B. 2 C. 3 D Which driver is called as thin-driver in JDBC A. Type-1 driver B. Type-2 driver C. Type-3 driver D. Type-4 driver 60. How many transaction isolation levels are defined in java.sql.connection interface A. 6 B. 2 C. 5 D. 3

12 61. Which method of java is invoked by JVM to reclaim the inaccessible memory location A. reclaim() method B. finalize() method C. final() method D. both b and c 62. allows java code to run in the JVM to call and be called by native applications A. JNI B. FJI C. NJI D. JFI 63. Interfaces helps in which type of inheritance A. Multiple inheritance B. Multilevel inheritance C. Hierarchical inheritance D. None of above 64. Which method of the Applet class displays the result of applet code on screen A. paint() method B. main() method C. run() method D. drawstring() method 65. Which command disassembles a class file A. javacmd B. javaamd C. javap D. java 66. In which we clone the object and their constituent parts A. Deep cloning B. Shallow cloning C. Both of above D. None of above

13 67. Which driver is efficient and always preferable for using JDBC applications A. Type-1 driver B. Type-2 driver C. Type-3 driver D. Type-4 driver 68. Executable applet is A..class file B..java file C..java html D..applet file 69. Which keyword is used while using interface A. throw B. throws C. extend D. implements 70. Which keyword represents object of the present class A. this B. static C. package D. interface 71. Which method can't be overidden A. println B. final C. super D. static

14 72. Hot java is A. Web browser B. Java environment C. System software D. IDE 73. javah stands for A. java dissasamebler B. java header file C. java interpreter D. java compiler 74. Main method parameter has which type of data type A. int B. char C. string D. double 75. How many keywords are available in java A. 24 B. 48 C. 96 D Smallest individual unit in java program is known as A. token B. string C. literal D. operator 77. Which among following classes is not part of Java's collection framework A. Stack B. Maps C. Queue D. Array

15 78. Suppose a class has public visibility. In this class we define a protected method. Which of the following statements is correct? A. From within protected methods you do not have access to public methods. B. This method is only accessible from inside the class itself and from inside all subclasses. C. In a class, you cannot declare methods with ad. This method is accessible from within the lower visibility than the visibility of the class in which it is defined. class itself and from within all classes defined in the same package as the class itself. 79. The object is created with "new" keyword A. At Compile-time B. At run-time C. Depends on the code D. None of these 80. Which statements are most accurate regarding the following classes? class A{private int i; protected int j; } class B extends A{ private int k; protected int m; } A. An object of B contains data fields j, k, m B. An object of B contains data fields k, m C. An object of B contains data fields j, m D. An object of B contains data fields i, j, k, m 81. A package is a collection of A. Classes and Interfaces B. Classes C. Editing tools D. Editing tools and Interfaces 82. A method within a class is only accessible by classes that are defined within the same package as the class of the method. Which one of the following is used to enforce such restriction?

16 A. Declare the method with the keyword public. B. Declare the method with the keyword private. C. Do not declare the method with any accessibility modifiers. D. Declare the method with the keyword public and private. 83. Choose the correct statement public class Circle{ private double radius; public Circle(double radius){ radius = radius; } } A. The program has a compilation error because we cannot assign radius to radius. B. The program has a compilation error because it does not have a main method. C. The program does not compile because Circle does not have a default constructor. D. The program will compile, but we cannot create an object of Circle with a specified radius. The object will always have radius Choose the correct statement : Restriction on static methods are- A. They cannot refer this or super in any way. B. They must only access static data. C. They can only call other static methods. D. All of the above 85. Name the keyword that makes a variable belong to a class, rather than being defined for each instance of the class. A. abstract B. static C. volatile D. final 86. In Java arrays are A. objects B. object references C. primitive data type D. None of the above 87. Which one of the following is a valid statement?

17 A. char[] c = new char&l B. char[] c = new char&l C. char[] c = new char&l D. char[] c = new char&l 88. What is the result of compiling and running the following code? public class Test{ public static void main(string[] args){ int[] a = new int[0]; System.out.print(a.length); } } A. 0 B. 1 C. compile error D. None of the above 89. What will be the output? public class Test{ public static void main(string[] args){ int[] x = new int[3]; System.out.println("x[0] is " + x[0]); } } A. The program runs fine and displays x[0] is 0 B. The program has a runtime error because the array element x[0] is not defined C. The program has a runtime error because the array elements are not initialized D. The program has a compile error because the size of the array wasn't specified when declaring the array 90. What is output of the following code: public class Test{public static void main(string[] args){ int[] x = {120, 200, 016 }; for(int i = 0; i < x.length; i++)system.out.print(x[i] + " "); } } A B C D. 016 is a compile error. It should be written as What will be the output? public class Test{ public static void main(string[] arg{ int[] a = new int[4]; a[1] = 1; a = new int[2]; System.out.println("a[1] is " + a[1]); } } A. a[1] is 0 B. a[1] is 1 C. a[1] is 2 D. Compile error

18 92. When you pass an array to a method, the method receives. A. The length of the array. B. The reference of the array. C. A copy of the array. D. A copy of the first element. 93. Which will legally declare, construct, and initialize an array? A. int [] mylist = { B. int [] mylist = (5, 8, 2); C. int mylist [] [] = {4,9,7,0}; D. int mylist [] = {4, 3, 7}; 94. What is the value of a[1] after the following code is executed? int[] a = {0, 2, 4, 1, 3}; for(int i = 0; i < a.length; i++) a[i] = a[(a[i] + 3) % a.length]; A. 0 B. 1 C. 2 D The output of the following fraction of code is public class Test{ public static void main(string args[]){ String s1 = new String("Hello"); String s2 = new String("Hellow"); System.out.printl A. Hellow B. Hello C. Compilation error D. None of these 96. Output : public class Test{ public static void main(string args[]){ String x = "hellow"; int y = 9; System.out.println(x += y); } } A. hellow9 B. 9hellow C. Compilation error D. None of these 97. tostring() method is defined in

19 A. java.lang.util B. java.lang.object C. java.lang.string D. None of these 98. The String method compareto() returns A. True B. False C. an int value D What will be the output? String str1 = "abcde"; System.out.println(str1.substring(1, 3)); A. abc B. ab C. bc D. cba 100. What is the output of the following println statement? String str1 = "Hellow"; System.out.println(str1.indexOf('t')); A. 1 B. -1 C. 2 D. -2

CHETTINAD COLLEGE OF ENGINEERING & TECHNOLOGY JAVA

1. JIT meaning a. java in time b. just in time c. join in time d. none of above CHETTINAD COLLEGE OF ENGINEERING & TECHNOLOGY JAVA 2. After the compilation of the java source code, which file is created