Tag: programming languages

Questions Related to programming languages

10.Compilation of mxml file gives
technology programming languages

  1. mxml file

  2. swf file

  3. as file

  4. Don't know

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Correct Option: B

What is the output for the below code ? import java.util.NavigableMap; import java.util.concurrent.ConcurrentSkipListMap; public class Test { public static void main(String... args) { NavigableMap navMap = new ConcurrentSkipListMap(); System.out.print(navMap.lastEntry()); } }
technology programming languages

  1. Compile error : No method name like lastEntry()

  2. null

  3. NullPointerException

  4. 0

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Correct Option: B

What is the output for the below code ? import java.util.NavigableMap; import java.util.concurrent.ConcurrentSkipListMap; public class Test { public static void main(String... args) { NavigableMapnavMap = new ConcurrentSkipListMap(); navMap.put(4, "April"); navMap.put(5, "May"); navMap.put(6, "June"); navMap.put(1, "January"); navMap.put(2, "February"); System.out.print(navMap.floorKey(3)); } }

technology programming languages

  1. Compile error : No method name like floorKey()

  2. null

  3. NullPointerException

  4. 2

Show answer
Correct Option: D

What is the output for the below code ? import java.util.NavigableMap; import java.util.concurrent.ConcurrentSkipListMap; public class Test { public static void main(String... args) { NavigableMapnavMap = new ConcurrentSkipListMap(); navMap.put(4, "April"); navMap.put(5, "May"); navMap.put(6, "June"); navMap.put(1, "January"); navMap.put(2, "February"); System.out.print(navMap.floorKey(3)); } }

technology programming languages

  1. Compile error : No method name like floorKey()

  2. null

  3. NullPointerException

  4. 2

Show answer
Correct Option: D

What is the output for the below code ? import java.io.Console; public class Test { public static void main(String... args) { Console con = System.console(); boolean auth = false; if (con != null) { int count = 0; do { String uname = con.readLine(null); char[] pwd = con.readPassword("Enter %s's password: ", uname); con.writer().write("\n\n"); } while (!auth && ++count < 3); } } }
technology programming languages

  1. NullPointerException

  2. It works properly

  3. Compile Error : No readPassword() method in Console class

  4. null

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Correct Option: A

interface I{ final class C1 { //1 static int i=9;; //2 } } class C2 implements I{ public static void main(String a[]){ System.out.println(I.C1.i); ///3 }}
technology programming languages

  1. compile time error at line 1

  2. compile time error at line 2

  3. compile time error at line 3

  4. prints 9

  5. Runtime exception

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Correct Option: D

class H { public static void main (String[] args) { String s1 = "HHH"; StringBuffer sb2 = new StringBuffer(s1); System.out.print(sb2.equals(s1) + "," + s1.equals(sb2)); }}

technology programming languages

  1. Prints: false,false

  2. Prints: true,false

  3. Prints: false,true

  4. Prints: true,true

  5. None of the above

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Correct Option: A

Java is a programming language originally developed by
technology programming languages

  1. Dennis Ritchie

  2. Edsger Dijkstra

  3. James Gosling

  4. Louis Pasteur

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Correct Option: C

Commonly used metasyntactic variable names are
technology programming languages

  1. Hello and world

  2. Foo and Bar

  3. i and j

  4. int and float

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Correct Option: B

Amoeba operating system was developed by

technology programming languages

  1. Linus Torvalds

  2. Dennis Ritchie

  3. Sun Microsystems

  4. Andrew S. Tanenbaum

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Correct Option: D