Explore topic-wise MCQs in Java Programming.

This section includes 22 Mcqs, each offering curated multiple-choice questions to sharpen your Java Programming knowledge and support exam preparation. Choose a topic below to get started.

1.

What is the output of this program?import java.io.*; public class files_Example { public static void main(String args[]) { File object = new File("/new folder/system"); System.out.print(object.getName()); } }

A. new folder
B. new folder/system
C. /new folder/system
D. system
E. None of these
Answer» E. None of these
Discussion
2.

What is the output of this program?import java.io.*; public class filesinputoutput_Example { public static void main(String args[]) { InputStream obj = new FileInputStream("inputoutput.java"); System.out.print(obj.available()); } }

A. Compilation error
B. Runtime error
C. true
D. false
E. None of these
Answer» B. Runtime error
Discussion
3.

What is the output of this program?import java.io.*; public class filesinputoutput_Example { public static void main(String[] args) { String object = "interview mania"; byte p[] = object.getBytes(); ByteArrayInputStream object1 = new ByteArrayInputStream(p); for (int K = 0; K < 2; ++K) { int q; while ((q = object1.read()) != -1) { if (K == 0) { System.out.print(Character.toUpperCase((char)q)); } } } } }

A. interview mania
B. MANIA
C. INTERVIEW
D. INTERVIEW MANIA
E. None of these
Answer» E. None of these
Discussion
4.

What is the output of this program?import java.io.*; public class filesinputoutput_Example { public static void main(String[] args) { String object = "interview Mania"; byte p[] = object.getBytes(); ByteArrayInputStream object1 = new ByteArrayInputStream(p); for (int K = 0; K < 2; ++K) { int q; while ((q = object1.read()) != -1) { if(K == 0) { System.out.print((char)q); } } } } }

A. interview
B. interview Mania
C. Maniainterview
D. interview Mania
E. None of these
Answer» E. None of these
Discussion
5.

What is the output of this program?import java.io.*; public class Chararrayinput_Example { public static void main(String[] args) { String object = "pqrst"; int length = object.length(); char p[] = new char[length]; object.getChars(0, length, p, 0); CharArrayReader input1 = new CharArrayReader(p); CharArrayReader input2 = new CharArrayReader(p, 1, 4); int K; int L; try { while ((K = input1.read()) == (L = input2.read())) { System.out.print((char)K); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }

A. pqrst
B. pqr
C. rst
D. pqrs
E. None of these
Answer» F.
Discussion
6.

What is the output of this program?import java.io.*; public class Chararrayinput_Example { public static void main(String[] args) { String object = "Interview Mania"; int length = object.length(); char p[] = new char[length]; object.getChars(0, length, p, 0); CharArrayReader input1 = new CharArrayReader(p); CharArrayReader input2 = new CharArrayReader(p, 0, 9); int K; try { while ((K = input2.read()) != -1) { System.out.print((char)K); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }

A. Interview Mania
B. Mania
C. Interview
D. ManiaInterview
E. None of these
Answer» D. ManiaInterview
Discussion
7.

What is the output of this program if input given is InterviewMania ?import java.util.*;import java.io.*; public class IO_Example { public static void main(String args[]) throws IOException { char ch; BufferedReader obj = new BufferedReader(new InputStreamReader(System.in)); do { ch = (char) obj.read(); System.out.print(ch); } while(ch!='w'); } }

A. InterviewMania
B. Mania
C. Interview
D. ManiaInterview
E. None of these
Answer» D. ManiaInterview
Discussion
8.

What is the output of this program?public class output { public static void main(String args[]) { StringBuffer c = new StringBuffer("InterviewMania"); System.out.println(c.length()); } }

A. 11
B. 12
C. 13
D. 14
E. 15
Answer» E. 15
Discussion
9.

What is the output of this program if input given is prstquvwxyz ?import java.util.*;import java.io.*; public class Main { public static void main(String args[]) throws IOException { char c; BufferedReader obj = new BufferedReader(new InputStreamReader(System.in)); do { c = (char) obj.read(); System.out.print(c); } while(c != 'q'); } }

A. prstquvwxyz
B. prstquv
C. prstq
D. quvwxyz
E. None of these
Answer» D. quvwxyz
Discussion
10.

What is the output of this program?public class IndexOf_Example { public static void main(String args[]) { String str="My first love is java."; System.out.println(str.indexOf('i')+" "+str.indexOf('o')+" "+str.lastIndexOf('i')+" "+str.lastIndexOf('j') ); } }

A. 10 14 17 4
B. 17 14 10 4
C. 4 10 14 17
D. 10 4 14 17
E. None of these
Answer» D. 10 4 14 17
Discussion
11.

What is the output of this program?public class output { public static void main(String args[]) { StringBuffer s1 = new StringBuffer("Interview"); s1.setCharAt(8,'W'); System.out.println(s1); } }

A. Interview
B. Mania
C. Compilation Error
D. IntervieW
E. Runtime Error
Answer» E. Runtime Error
Discussion
12.

What is the output of this program?import java.io.*; public class Chararrayinput_Example { public static void main(String[] args) { String object = "InterviewMania"; int len = object.length(); char array[] = new char[len]; object.getChars(0, len, array, 0); CharArrayReader chararray = new CharArrayReader(array); CharArrayReader chararray0 = new CharArrayReader(array, 1, 4); int K; int L; try { while((K = chararray.read()) == (L = chararray0.read())) { System.out.print((char)K); } } catch (IOException e) { e.printStackTrace(); } } }

A. Interview
B. InterviewMania
C. Mania
D. All of these
E. None of these
Answer» F.
Discussion
13.

What is the output of this program?import java.io.*; public class Chararrayinput_Example { public static void main(String[] args) { String object = "InterviewMania"; int len = object.length(); char ch[] = new char[len]; object.getChars(0, len, ch, 0); CharArrayReader chararray = new CharArrayReader(ch); CharArrayReader chararray0 = new CharArrayReader(ch, 0, 9); int i; try { while((i = chararray0.read()) != -1) { System.out.print((char)i); } } catch (IOException e) { e.printStackTrace(); } } }

A. Interview
B. Mania
C. InterviwMania
D. Runtime Error
E. Compilation Error
Answer» B. Mania
Discussion
14.

What is the output of this program?import java.io.*; public class InputStream_Example { public static void main(String args[]) throws IOException { InputStream obj = new FileInputStream("Interviewmania.com"); System.out.print(obj.available()); } }

A. Compilation Error
B. Runtime Error
C. true
D. false
E. None of these
Answer» C. true
Discussion
15.

What is the output of this program?public class Result { public static void main(String args[]) { StringBuffer strbuf = new StringBuffer("Interview Mania"); StringBuffer strbuf0 = strbuf.reverse(); System.out.println(strbuf0); } }

A. Interview Mania
B. ainaM weivretnI
C. weivretnI
D. ainaM
E. None of these
Answer» C. weivretnI
Discussion
16.

What is the output of this program?public class Main { public static void main(String args[]) { StringBuffer strbuf = new StringBuffer("Interview"); StringBuffer strbuf0 = new StringBuffer(" Mania"); strbuf.append(strbuf0); System.out.println(strbuf); } }

A. Mania
B. Interview
C. Interview Mania
D. Compilation Error
E. Runtime Error
Answer» D. Compilation Error
Discussion
17.

What is the output of this program?import java.io.*; public class Chararrayinput_Example { public static void main(String[] args) { String object = "Interview Mania"; int length = object.length(); char p[] = new char[length]; object.getChars(0,length,p,0); CharArrayReader input1 = new CharArrayReader(p); CharArrayReader input2 = new CharArrayReader(p, 0, 3); int K; try { while ((K = input1.read()) != -1) { System.out.print((char)K); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }

A. Interview
B. Mania
C. Interview Mania
D. InterviewMania
E. None of these
Answer» D. InterviewMania
Discussion
18.

What is the output of this program?import java.io.*; public class files_Example { public static void main(String args[]) { File object = new File("/New Folder/system"); System.out.print(object.getParent()); System.out.print(" " + object.isFile()); } }

A. /New
B. Folder false
C. /New false
D. /New Folder false
E. None of these
Answer» E. None of these
Discussion
19.

What is the output of this program?import java.io.*; public class files_Example { public static void main(String args[]) { File object = new File("/java/system"); System.out.print(object.canWrite()); System.out.print(" " + object.canRead()); } }

A. false false
B. false
C. true
D. true false
E. None of these
Answer» B. false
Discussion
20.

What is the output of this program?import java.io.*; public class files_Example { public static void main(String args[]) { File object = new File("/New Folder/system"); System.out.print(object.getAbsolutePath()); } }

A. /New Folder/system
B. /New Folder
C. /system
D. Folder/system
E. None of these
Answer» B. /New Folder
Discussion
21.

What is the output of this program if input given is InterviewMania ?

A. InterviewMania
B. Mania
C. Interview
D. ManiaInterview
E. None of these
Answer» D. ManiaInterview
Discussion
22.

What is the output of this program if input given is prstquvwxyz ?

A. prstquvwxyz
B. prstquv
C. prstq
D. quvwxyz
E. None of these
Answer» D. quvwxyz
Discussion