Tag: programming languages

Questions Related to programming languages

Which one of these are JVM thrown exceptions??
technology programming languages

  1. NullPointerException

  2. NumberFormatException

  3. ExceptionInInitializerError

  4. IllegalArgumentException

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Correct Option: A,C

Which one of these are true regarding inheritance in java??
technology programming languages

  1. A class can extend multiple classes

  2. An interface can extend multiple classes

  3. An interface can implement multiple interfaces

  4. A class can extend multiple interfaces

  5. A class can implement multiple interfaces

  6. An interface can extend multiple interfaces

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Correct Option: E,F

Given a part of code tell the output(Assume that the code is perfect ie no compiler error or runtime exceptions) Pattern p=Pattern.compile("\d+"); Matcher m=p.matcher("345678"); while(m.find()) { System.out.print("-"+m.group()+"-"); }
technology programming languages

  1. -345678-

  2. -3--4--5--6--7--8-

  3. -3--34--345--3456--34567--345678-

  4. -345678--345678--345678--345678--345678--345678--345678-

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Correct Option: A

Consider the following code snippet String s1="Hello"; String s2=s1; s1.concat("World"); System.out.println(s1+"---"+s2); What is the output??
technology programming languages

  1. Hello---Hello

  2. Hello---HelloWorld

  3. HelloWorld---Hello

  4. HelloWorld---HelloWorld

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Correct Option: A

Which one of these are legal combinations when used with a method??
technology programming languages

  1. abstract final

  2. abstract static

  3. static final

  4. private abstract

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Correct Option: C

class A { public void add(int,int) { System.out.println("Normal"); } public void add(int... a) { System.out.println("Varargs"); } public static void main(String... args) { new A().add(9,9); } } what is the output??
technology programming languages

  1. Varargs

  2. Normal

  3. Compilation Fails

  4. Runtime Exception

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Correct Option: B

Inode contains the following fields?
technology programming languages

  1. File owner and File type

  2. File access permission and File access tie

  3. Number of Links, File size and Location of the file data

  4. All of the above

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Correct Option: D

In a crontab the job to be executed is scheduled as follows . 10 06 * 8 6 Job to be scheduled Which of the following statement is true?
technology programming languages

  1. Command will be executed on every Sunday in 06:10 in September

  2. Command will be executed on every Saturday at 10:06 in August

  3. Command will be executed on every Sunday at 10:06 in September

  4. Command will be executed on every Saturday at 6:10 in August

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Correct Option: D

How can I forward all the arguments given to my script to another command? Here Command is the name of the command to be execute.
technology programming languages

  1. Command “@$”

  2. command ${@:+"$@"}

  3. command ${"$@+@:”}

  4. Command “$?”

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Correct Option: B

The fork() system call is used for the following process management
technology programming languages

  1. To increase/decrease the data segment size of a process

  2. To create a new process

  3. To bias the existing priority of a process

  4. To get parent process identifier

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Correct Option: B