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programming languages Online Quiz - 13

Description: programming languages Online Quiz - 13
Number of Questions: 20
Created by:
Tags: programming languages

What is the output of following.

public static void main(String[]  args) {
    System.out.println("c="+args.length());
}
  1. 2

  2. compileTimeError

  3. 1

  4. RuntimeException

Answer: 2

What is the output of following.

public static void main(String[]  args) {
    String s1="sanjay";
    String s2="sanjay";             
    System.out.println("c="+s1==s2);
}
  1. prasad

  2. true

  3. false

  4. compileTime Error

Answer: 3

What is the output of following.

public static void main(String[]  args) {
    String s1="prasad";
    String s2="Ram";
    s1.concat(s2);
    System.out.println("c="+s1);
}
  1. Ram

  2. prasad

  3. RamPrasad

  4. PrasadRam

Answer: 2

What is the output of following.

public static void main(String[]  args) {
    final int b=3;
    byte c=b/2;
    System.out.println("c="+c);
}
  1. Runtime Exception

  2. 1.5

  3. 1

  4. CompileTimeError

Answer: 3

Is String class final?

  1. True

  2. False

Answer: 1

String s = "India";String s2 = s;s.concat (” is a nation.”);System.out.println(s);

  1. India

  2. India is a nation.

  3. is a nation.

  4. None of the above.

Answer: 1

Which of the following class among these are synchronized?

  1. StringBuilder

  2. StringBuffer

  3. Both (1) and (2)

  4. None of the above

Answer: 2

Please dont Try this Question... Try Next One.... If you attend others, you will get to know the answer of this question. Questions: 1. 1. public class Question { Public static void main(String args[]) { int i=10; System.out.println("i="+++i); } 2. public class Question { public static void main(String args[]) { int x=010; System.out.print("X="+x); } } 3. public class Question { public static void main(String args[]) { int x=y=10; y=12; System.out.print(x+"&"+y); } } 4. public class Question{ public static void main(String args[]) { int i=3,j=2; System.out.print("i|j="+ (i|j)); } } 5. public class Question { public static void main(String args[]) { int x=0x10; System.out.print("X="+x); } } Answers: 1. System.out.println("i="+++i); Must be as a System.out.println("i="+ ++i); “Space between operators” 2. int x=010; In this statement, compile will take it as a OCTAL NUMBER. So OCTAL(10)=DECIMAL(8) 3. int x=y=10; In this statement, We are using y without declaring it. So will cause Compile Time Error. 4. 3 ? 1 1 2 ? 1 0 ------------------ (OR) 3 ? 1 1 5. int x=0x10; In the above statement, Compile will take it as a HEXA DECIMAL. So. HEXA(10) ? DECIMAL(16)

  1. I gave

  2. Questions and

  3. Answers

  4. in this question.

Answer: 3

public class Question { public static void main(String args[]) { int x=0x10; System.out.print("X="+x); } }

  1. X=10

  2. X=16

  3. X=0

  4. Compile Time Error

Answer: 2

public class e { public static void main(String args[]) { int i=3,j=2; System.out.print("i|j="+ (i|j)); } }

  1. i | j = 3

  2. i | j = 2

  3. Compile Time Error

  4. None

Answer: 1

public class Question { public static void main(String args[]) { int x=y=10; y=12; System.out.print(x+"&"+y); } }

  1. 10 & 12

  2. 10 & 10

  3. Compile Time Error

  4. None

Answer: 3

public class Question { public static void main(String args[]) { int x=010; System.out.print("X="+x); } }

  1. X=8

  2. X=10

  3. X=11

  4. None

Answer: 1
  1. public class Question { public static void main(String args[]) { int i=10; System.out.println("i="+++i); }
  1. i=0

  2. i=11

  3. invalid argument to operation

  4. none

Answer: 3

What is the output for the below code ? public class A { public A() { System.out.println("A"); } } public class B extends A implements Serializable { public B() { System.out.println("B"); } } public class Test { public static void main(String... args) throws Exception { B b = new B(); ObjectOutputStream save = new ObjectOutputStream(new FileOutputStream("datafile")); save.writeObject(b); save.flush(); ObjectInputStream restore = new ObjectInputStream(new FileInputStream("datafile")); B z = (B) restore.readObject(); } }

  1. A B A

  2. A B A B

  3. B B

  4. A B

Answer: 1

What is the output for the below code ?import java.util.regex.Matcher;import java.util.regex.Pattern;public class Test { public static void main(String... args) { Pattern p = Pattern.compile("a*b"); Matcher m = p.matcher("b"); boolean b = m.matches(); System.out.println(b); }}

  1. true

  2. Compile Error

  3. false

  4. b

Answer: 1

What is the output for the below code ? public class B { public String getCountryName(){ return "USA"; } public StringBuffer getCountryName(){ StringBuffer sb = new StringBuffer(); sb.append("UK"); return sb; } public static void main(String[] args){ B b = new B(); System.out.println(b.getCountryName().toString()); } }

  1. Compile with error

  2. USA

  3. UK

  4. Runtime Exception

Answer: 1

What is the output for the below code ? class A implements Runnable{ public void run(){ System.out.println(Thread.currentThread().getName()); } } public class Test { public static void main(String... args) { A a = new A(); Thread t = new Thread(a); Thread t1 = new Thread(a); t.setName("t"); t1.setName("t1"); t.setPriority(10); t1.setPriority(-3); t.start(); t1.start(); } }

  1. t t1

  2. t1 t

  3. t t

  4. Compilation succeed but Runtime Exception

Answer: 4

class c1 { public void m1() { System.out.println("m1 method in C1 class"); } } class c2 { public c1 m1() { return new c1(){ public void m1() { System.out.println("m1 mehod in anonymous class"); }};} public static void main(String a[]) { c1 ob1 =new c2().m1(); ob1.m1(); }}

  1. prints m1 method in C1 class

  2. prints m1 method in anonumous class

  3. compile time error

  4. Runtime error

  5. none of the above

Answer: 2

How to check the version details in powershell 2.0?

  1. get-host

  2. $PSVersionTable

  3. both

  4. Get-powershellversion

Answer: 1

The Microsoft architect of Windows PowerShell, it's public face and probably most vocal proponent is?

  1. Roy G. Biv

  2. Kevin Bacon

  3. Jeffrey Snover

  4. All of the above

Answer: 3
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