Java Core Mock Test 4

A. Given username and password is checked with database and found invalid

B. 5th element of an array is accessed, whose size is 3

C. length() method is called on a String object, that is assigned to null

D. A file that actually does not exist, is opened for reading

E. An attempt to connect to the database is made but failed.

A. true

B. Welcome Planet

C. Compile-time error

D. false

Run time error

A. Compile-time error

B. false false

C.true false

D.true true

E.false true

A. Line 1: public void m1() throws IOException Line 2: public void m1() throws FileNotFoundException Line 3: public void m1() throws Exception

B. Line 1: public void m1() throws Error Line 2: public void m1() throws Exception Line 3: public void m1() throws Throwable

C. Line 1: public void m1() throws NoClassDefFoundError Line 2: public void m1() throws Error Line 3: public void m1()

D. Line 1: public void m1() throws NullPointerException Line 2: public void m1() throws RuntimeException Line 3: public void m1() e. Line 1: public void m1()

E. Line 1: public void m1() Line 2: public void m1() Line 3: public void m1()

A.Cloneable interface

B. Writable interface Writable interface

C. Readable interface

D. Serializable interface

E. ObjectSerializable interface

A. class A { int v; public String sayHello() { return "Hello"; }public class B extends A { public int sayHello(int a) { return 3 + a; } } }

B. class A { int v; public String sayHello() { return "Hello"; } } class B { A a; public String sayHello() { return "Hello from B"; } }

C. class A { int v; final String sayHello() { return "Hello"; } } class B extends A { public int sayHello(int a) { return 3 + a; } }

D. class A { int a; public String methodA(String s) { String var = "My App" + s; return var; } } class B extends A { public String methodA(String s) { String bar = "Bar" + s; return bar; } }

E. interface MyInterface { public void myMethod(String s); } class A implements MyInterface { public void myMethod(String s) { // Some Implementation } }

A. Runtime Error

B. Inside showMethod. followed by caught: b.java.lang.IllegalAccessException: exception

C. Compiles successfully, nothing is printed

D. Compilation Error

A. No special precautions need be taken

B. Any method calling X must use try-catch, specifically catching FileNotFoundException

C. The method X must be declared as throwing FileNotFoundException

D. The method X must be declared as throwing IOException or Exception 26 Consider the following code: class A

E. Can contain Nulls

A. Deqeue

B. Queue

C. Stack

D. NavigableSet

E. NavigableMap

A. the elements are ordered

B. the elements are sorted

C. cannot contain NULLs

D. the elements are NOT ordered

A. throw new Error();

B. throw new Throwable();

C. throw new ExceptionOneOne();

D. throw new Exception();

E. throw new ExceptionOneTwo();

A. public class Employee implements Info extends Data { public void load(){ /*do something*/ } public void Info.load(){ /*do something*/ } }

B. public class Employee extends Info implements Data { public void load() { /*do something*/ } }

C. public class Employee implements Info extends Data { public void Data.load(){ /*do something*/ } public void load(){ /*do something*/ } }

D. public class Employee implements Info extends Data { public void load() { /*do something*/ } }

E. public class Employee extends Info implements Data public void load(){ /*do something*/ } public void Info.load(){ /*do something*/ } } 10\

A. 10 10

B. Compilation Error. Duplicate identifer ID found

C. 20 20

D. 10 20

E. 20

A. Subclasses of Exceptions can be caught using try-catch

B. Error type objects can be handled only by JVM

C. Error is the subclass of Exception

D. Subclasses of Error are unchecked

E. Subclasses of Throwable can be caught using try-catch

A. DBMetaData

B. MetaData

C. DatabaseMetaData

D. ResultSetMetaData

E. SchemaMetaData

A. DriverManager

B. CallableStatement

C. Connection

D. Statement

E. SQLWarning

A. the Set of key-value pairs contained in the Map

B. The Collection of values contained in the Map

C. It is an inner interface inside Map interface

D. the Set of keys contained in the Map

A. Line 1 : throw new FileNotFoundException(); Line 2 : throw new IOException(); Line 3 : throw new Exception();

B. Line 1 : throw new Exception(); Line 2 : throw new IOException(); Line 3 : throw new FileNotFoundException();

C. The code is wrong. Exceptions should be caught in reversed hierarchy order.

D. Line 1 : throw new IOException(); Line 2 : throw new IOException(); Line 3 : throw new IOException();

E. Line 1 : throw new IOException(); Line 2 : throw new FileNotFoundException(); Line 3 : throw new Exception(); 43 Consider the following program: class A extends Thread { public void run() {System.out.print("A");} } class B

A. runtime error

B. Catchable caught null pointer exception null pointer exception

C. null pointer exception null pointer exception Catchable caught

D. compile-time error

E. null pointer exception Catchable caught null pointer exception

A. Inheritance is a kind of Encapsulation

B. Inheritance enables adding new features and functionality to an existing class without modifying the existing class

C. In an inheritance hierarchy, a subclass can also act as a super class

D. Inheritance does not allow sharing data and methods among multiple classes

E. In an inheritance hierarchy, a superclass can also act as a sub class

Public abstract class Canine{ public Bark speak(); }

Public abstract class Canine{ public Bark speak(); {} }

Public abstract Canine {public abstract Bark speak(); }

Public class canine abstract { public abstract Bark speak); }

A. ResultSet.TYPE_SCROLL_SENSITIVE

B. ResultSet.TYPE_SCROLLABLE

C. ResultSet.TYPE_SCROLL_INSENSITIVE

D. ResultSet.TYPE_FORWARD_ONLY

E. ResultSet.TYPE_SCROLL_BIDIRECTIONAL

A. Compiles successfully, nothing is printed

B. Compilation Error

C. Runtime Error

D. Inside showMethod. followed by caught: java.lang.IllegalAccessException: exception

A. a SortedSet extended with navigation methods for Maps.

B. a SortedSet extended with navigation methods for Lists.

C. a new class implementation of Set which can navigate the ResultSet object

D. a SortedSet extended with navigation methods reporting closest matches for given search targets.

A. No compilation error but throws RuntimeException on running the code

B. Compilation error at line 10

C. Compilation error at line 14

D. Compilation error at line 5

E. Compilation error at line 6