Explore topic-wise MCQs in Technical Programming.

This section includes 1671 Mcqs, each offering curated multiple-choice questions to sharpen your Technical Programming knowledge and support exam preparation. Choose a topic below to get started.

901.

What is the length of the application box made by this program? import java.awt.*; import java.applet.*; public class myapplet extends Applet { Graphic g; g.drawString("A Simple Applet",20,20); }

A. 20
B. Default value
C. Compilation Error
D. Runtime Error
Answer» D. Runtime Error
Discussion
902.

What is the output of this program? import java.lang.reflect.*; class Additional_packages { public static void main(String args[]) { try { Class c = Class.forName("java.awt.Dimension"); Constructor constructors[] = c.getConstructors(); for (int i = 0; i < constructors.length; i++) System.out.println(constructors[i]); } catch (Exception e) { System.out.print("Exception"); } } }

A. Program prints all the constructors of ‘java.awt.Dimension’ package
B. Program prints all the possible constructors of class ‘Class’
C. Program prints “Exception”
D. Runtime Error
Answer» B. Program prints all the possible constructors of class ‘Class’
Discussion
903.

Which of these package is used for all the text related modifications?

A. java.text
B. java.awt
C. java.lang.text
D. java.lang.text
Answer» B. java.awt
Discussion
904.

Which of these class is used for creating a client for a server-client operations?

A. serverClientjava
B. Client.java
C. AddClient.java
D. ServerClient.java
Answer» D. ServerClient.java
Discussion
905.

Which of these Exceptions is thrown by remote method?

A. RemoteException
B. InputOutputException
C. RemoteAccessException
D. RemoteInputOutputException
Answer» B. InputOutputException
Discussion
906.

Which of these methods are member of Remote class?

A. checkIP()
B. addLocation()
C. AddServer()
D. None of the mentioned
Answer» E.
Discussion
907.

Which of these package is used for remote method invocation?

A. java.applet
B. java.rmi
C. java.lang.rmi
D. java.lang.reflect
Answer» C. java.lang.rmi
Discussion
908.

What is Remote method invocation (RMI)?

A. RMI allows us to invoke a method of java object that executes on another machine
B. RMI allows us to invoke a method of java object that executes on another Thread in multithreaded programming
C. RMI allows us to invoke a method of java object that executes parallely in same machine
D. None of the mentioned
Answer» B. RMI allows us to invoke a method of java object that executes on another Thread in multithreaded programming
Discussion
909.

What is the output of this program? import java.util.*; class Bitset { public static void main(String args[]) { BitSet obj1 = new BitSet(5); BitSet obj2 = new BitSet(10); for (int i = 0; i < 5; ++i) obj1.set(i); for (int i = 3; i < 13; ++i) obj2.set(i); obj1.and(obj2); System.out.print(obj1); } }

A. {0, 1}
B. {2, 4}
C. {3, 4}
D. {3, 4, 5}
Answer» D. {3, 4, 5}
Discussion
910.

What is the output of this program? import java.util.*; class date { public static void main(String args[]) { Date obj = new Date(); System.out.print(obj); } }

A. Prints Present Date
B. Runtime Error
C. Any Garbage Value
D. Prints Present Time & Date
Answer» E.
Discussion
911.

What is the output of this program? import java.util.*; class Bitset { public static void main(String args[]) { BitSet obj = new BitSet(5); for (int i = 0; i < 5; ++i) obj.set(i); System.out.print(obj.get(3)); } }

A. 2
B. 3
C. 4
D. 5
Answer» B. 3
Discussion
912.

What is the output of this program? import java.util.*; class Bitset { public static void main(String args[]) { BitSet obj = new BitSet(5); for (int i = 0; i < 5; ++i) obj.set(i); obj.clear(2); System.out.print(obj.length() + " " + obj.size()); } }

A. 4 64
B. 5 64
C. 5 128
D. 4 128
Answer» C. 5 128
Discussion
913.

What is the output of this program? import java.util.*; class Bitset { public static void main(String args[]) { BitSet obj = new BitSet(5); for (int i = 0; i < 5; ++i) obj.set(i); obj.clear(2); System.out.print(obj); } }

A. {0, 1, 3, 4}
B. {0, 1, 2, 4}
C. {0, 1, 2, 3, 4}
D. {0, 0, 0, 3, 4}
Answer» B. {0, 1, 2, 4}
Discussion
914.

Which of these methods is used to retrieve elements in BitSet object at specific location?

A. get()
B. Elementat()
C. ElementAt()
D. getProperty()
Answer» B. Elementat()
Discussion
915.

Which of these is a method of class Date which is used to search whether object contains a date before the specified date?

A. after()
B. contains()
C. before()
D. compareTo()
Answer» D. compareTo()
Discussion
916.

Which of these method is used to calculate number of bits required to hold the BitSet object?

A. size()
B. length()
C. indexes()
D. numberofBits()
Answer» C. indexes()
Discussion
917.

Which of these method is used to make a bit zero specified by the index?

A. put()
B. set()
C. remove()
D. clear()
Answer» E.
Discussion
918.

Which of these class object has architecture similar to that of array?

A. Bitset
B. Map
C. Hashtable
D. All of the mentioned
Answer» B. Map
Discussion
919.

What is the output of this program? import java.util.*; class properties { public static void main(String args[]) { Properties obj = new Properties(); obj.put("AB", new Integer(3)); obj.put("BC", new Integer(2)); obj.put("CD", new Integer(8)); System.out.print(obj.keySet()); } }

A. {AB, BC, CD}
B. [AB, BC, CD].
C. [3, 2, 8].
D. {3, 2, 8}
Answer» C. [3, 2, 8].
Discussion
920.

What is the output of this program? import java.util.*; class hashtable { public static void main(String args[]) { Hashtable obj = new Hashtable(); obj.put("A", new Integer(3)); obj.put("B", new Integer(2)); obj.put("C", new Integer(8)); System.out.print(obj.toString()); } }

A. {C=8, B=2}
B. [C=8, B=2]
C. {A=3, C=8, B=2}
D. [A=3, C=8, B=2].
Answer» D. [A=3, C=8, B=2].
Discussion
921.

What is the output of this program? import java.util.*; class hashtable { public static void main(String args[]) { Hashtable obj = new Hashtable(); obj.put("A", new Integer(3)); obj.put("B", new Integer(2)); obj.put("C", new Integer(8)); obj.remove(new String("A")); System.out.print(obj); } }

A. {C=8, B=2}
B. [C=8, B=2].
C. {A=3, C=8, B=2}
D. [A=3, C=8, B=2].
Answer» B. [C=8, B=2].
Discussion
922.

What is the output of this program? import java.util.*; class hashtable { public static void main(String args[]) { Hashtable obj = new Hashtable(); obj.put("A", new Integer(3)); obj.put("B", new Integer(2)); obj.put("C", new Integer(8)); obj.clear(); System.out.print(obj.size()); } }

A. 0
B. 1
C. 2
D. 3
Answer» B. 1
Discussion
923.

What is the output of this program? import java.util.*; class hashtable { public static void main(String args[]) { Hashtable obj = new Hashtable(); obj.put("A", new Integer(3)); obj.put("B", new Integer(2)); obj.put("C", new Integer(8)); System.out.print(obj.contains(new Integer(5))); } }

A. 0
B. 1
C. True
D. False
Answer» E.
Discussion
924.

Which of these methods is used to retrieve the elements in properties object at specific location?

A. get()
B. Elementat()
C. ElementAt()
D. getProperty()
Answer» E.
Discussion
925.

Which of these is the interface of legacy is implemented by Hashtable and Dictionary classes?

A. Map
B. Enumeration
C. HashMap
D. Hashtable
Answer» B. Enumeration
Discussion
926.

Which of these method is used to insert value and its key?

A. put()
B. set()
C. insertElement()
D. addElement()
Answer» B. set()
Discussion
927.

Which of these class object uses key to store value?

A. Dictionary
B. Map
C. Hashtable
D. All of the mentioned
Answer» E.
Discussion
928.

What is the output of this program? import java.util.*; class stack { public static void main(String args[]) { Stack obj = new Stack(); obj.push(new Integer(3)); obj.push(new Integer(2)); obj.pop(); obj.push(new Integer(5)); System.out.println(obj); } }

A. [3, 5].
B. [3, 2].
C. [3, 2, 5].
D. [3, 5, 2].
Answer» B. [3, 2].
Discussion
929.

What is the output of this program? import java.util.*; class vector { public static void main(String args[]) { Vector obj = new Vector(4,2); obj.addElement(new Integer(3)); obj.addElement(new Integer(2)); obj.addElement(new Integer(5)); obj.removeAll(obj); System.out.println(obj.isEmpty()); } }

A. 0
B. 1
C. True
D. False
Answer» D. False
Discussion
930.

. What is the output of this program? import java.util.*; class vector { public static void main(String args[]) { Vector obj = new Vector(4,2); obj.addElement(new Integer(3)); obj.addElement(new Integer(2)); obj.addElement(new Integer(6)); obj.insertElementAt(new Integer(8), 2); System.out.println(obj); } }

A. [3, 2, 6].
B. [3, 2, 8].
C. [3, 2, 6, 8].
D. [3, 2, 8, 6].
Answer» E.
Discussion
931.

What is the output of this program? import java.util.*; class vector { public static void main(String args[]) { Vector obj = new Vector(4,2); obj.addElement(new Integer(3)); obj.addElement(new Integer(2)); obj.addElement(new Integer(5)); System.out.println(obj.capacity()); } }

A. 2
B. 3
C. 4
D. 6
Answer» D. 6
Discussion
932.

What is the output of this program? import java.util.*; class vector { public static void main(String args[]) { Vector obj = new Vector(4,2); obj.addElement(new Integer(3)); obj.addElement(new Integer(2)); obj.addElement(new Integer(5)); System.out.println(obj.elementAt(1)); } }

A. 0
B. 3
C. 2
D. 5
Answer» D. 5
Discussion
933.

Which of these methods is used to add elements in vector at specific location?

A. add()
B. set()
C. AddElement()
D. addElement()
Answer» E.
Discussion
934.

What is the name of data member of class Vector which is used to store number of elements in the vector?

A. length
B. elements
C. elementCount
D. capacity
Answer» D. capacity
Discussion
935.

Which of these is the interface of legacy?

A. Map
B. Enumeration
C. HashMap
D. Hashtable
Answer» C. HashMap
Discussion
936.

Which of these are legacy classes?

A. Stack
B. Hashtable
C. Vector
D. All of the mentioned
Answer» E.
Discussion
937.

Which of these class object can be used to form a dynamic array?

A. ArrayList
B. Map
C. Vector
D. ArrayList & Vector
Answer» E.
Discussion
938.

What is the output of this program? import java.util.*; class Maps { public static void main(String args[]) { TreeMap obj = new TreeMap(); obj.put("A", new Integer(1)); obj.put("B", new Integer(2)); obj.put("C", new Integer(3)); System.out.println(obj.entrySet()); } }

A. [A, B, C].
B. [1, 2, 3].
C. {A=1, B=2, C=3}
D. [A=1, B=2, C=3].
Answer» E.
Discussion
939.

What is the output of this program? import java.util.*; class Maps { public static void main(String args[]) { HashMap obj = new HashMap(); obj.put("A", new Integer(1)); obj.put("B", new Integer(2)); obj.put("C", new Integer(3)); System.out.println(obj.get("B")); } }

A. 1
B. 2
C. 3
D. null
Answer» C. 3
Discussion
940.

What is the output of this program? import java.util.*; class Maps { public static void main(String args[]) { HashMap obj = new HashMap(); obj.put("A", new Integer(1)); obj.put("B", new Integer(2)); obj.put("C", new Integer(3)); System.out.println(obj.keySet()); } }

A. [A, B, C].
B. {A, B, C}
C. {1, 2, 3}
D. [1, 2, 3].
Answer» B. {A, B, C}
Discussion
941.

What is the output of this program? import java.util.*; class Maps { public static void main(String args[]) { HashMap obj = new HashMap(); obj.put("A", new Integer(1)); obj.put("B", new Integer(2)); obj.put("C", new Integer(3)); System.out.println(obj); } }

A. {A 1, B 1, C 1}
B. {A, B, C}
C. {A-1, B-1, C-1}
D. {A=1, B=2, C=3}
Answer» E.
Discussion
942.

Which of these method is used add an element and corresponding key to a map?

A. put()
B. set()
C. redo()
D. add()
Answer» B. set()
Discussion
943.

Which of these methods can be used to obtain set of all keys in a map?

A. getAll()
B. getKeys()
C. keyall()
D. keyall()
Answer» E.
Discussion
944.

Which of these method Map class is used to obtain an element in the map having specified key?

A. search()
B. get()
C. set()
D. look()
Answer» C. set()
Discussion
945.

Which of these method is used to remove all keys/values pair from the invoking map?

A. delete()
B. remove()
C. clear()
D. removeAll()
Answer» C. clear()
Discussion
946.

Which of these classes provide implementation of map interface?

A. ArrayList
B. HashMap
C. LinkedList
D. LinkedList
Answer» C. LinkedList
Discussion
947.

Which of these object stores association between keys and values?

A. Hash table
B. map
C. Array
D. string
Answer» C. Array
Discussion
948.

What is the output of this program? import java.util.*; class Output { public static void main(String args[]) { TreeSet t = new TreeSet(); t.add("3"); t.add("9"); t.add("1"); t.add("4"); t.add("8"); System.out.println(t); } }

A. [1, 3, 5, 8, 9].
B. [3, 4, 1, 8, 9].
C. [9, 8, 4, 3, 1].
D. [1, 3, 4, 8, 9].
Answer» E.
Discussion
949.

What is the output of this program? import java.util.*; class Output { public static void main(String args[]) { HashSet obj = new HashSet(); obj.add("A"); obj.add("B"); obj.add("C"); System.out.println(obj + " " + obj.size()); } }

A. ABC 3
B. [A, B, C] 3
C. ABC 2
D. [A, B, C] 2
Answer» C. ABC 2
Discussion
950.

What is the output of this program? import java.util.*; class Linkedlist { public static void main(String args[]) { LinkedList obj = new LinkedList(); obj.add("A"); obj.add("B"); obj.add("C"); obj.removeFirst(); System.out.println(obj); } }

A. [A, B].
B. [B, C].
C. [A, B, C, D].
D. [A, B, C, D].
Answer» C. [A, B, C, D].
Discussion