Free Software Design and Architecture MCQs with Answers

• A. Interface
• B. Class
• C. Variable
• D. Method

Explanation: Runnable is a Java interface containing the run() method. A class implements it to define work that can be executed by a thread.

• A. At Compile-time
• B. At run-time
• C. Depends on the code
• D. None of these

Explanation: The new keyword creates an object and allocates its memory while the program is running, so object creation occurs at run time rather than…

• A. reclaim() method
• B. finalize() method
• C. final() method
• D. both b and c

Explanation: Historically, the JVM could call finalize() on an unreachable object before garbage collection reclaimed it.

• A. .class
• B. .doc
• C. .java
• D. .cdr

Explanation: The Java compiler converts source code into bytecode stored in a .class file, which the JVM later loads and executes.

• A. abstract
• B. static
• C. volatile
• D. final

Explanation: The static keyword makes a variable belong to the class itself, so one shared copy exists rather than a separate copy for every object.

• A. int
• B. char
• C. string
• D. double

Explanation: The main method receives command-line arguments as a String array, written as String[].

• A. javacmd
• B. javaamd
• C. javap
• D. java

Explanation: javap is the Java class-file disassembler and can display bytecode, fields, methods, and signatures.

• A. java compiler
• B. java debugger
• C. java Interpreter
• D. java Disassemble

Explanation: The name javap refers to Java's disassembler tool, which examines compiled .class files and can show their bytecode structure.

• A. Deep cloning
• B. Shallow cloning
• C. Both of above
• D. None of above

Explanation: Deep cloning copies an object and recursively copies the objects referenced by its fields, so the clone has independent constituent parts.

• A. java Disassemble
• B. java Interpreter
• C. java compiler
• D. java debugger

Explanation: `jdb` is Java's command-line debugger, used to set breakpoints, inspect variables, and step through program execution.

• A. Byte code
• B. First code
• C. Mid code
• D. None of above

Explanation: Java source is compiled into bytecode, which is stored in `.class` files and executed by the Java Virtual Machine.

• A. Final class
• B. abstract class
• C. parent class
• D. None of above

Explanation: A class declared `final` cannot be extended, which prevents inheritance from that class.

• A. moderate typed
• B. strogly typed
• C. weakly typed
• D. none of these

Explanation: Java is strongly typed because variables and expressions have defined types, and incompatible assignments generally require explicit…

• A. None
• B. One
• C. Two
• D. Many

Explanation: A .NET DLL is an assembly that can contain multiple types, including many classes, interfaces, structures, and other metadata.

• A. Threading
• B. AppDomain
• C. RCW
• D. Serialization

Explanation: Serialization converts an object into a storable or transmissible representation, such as a byte stream, while deserialization…

• A. CORBA toolkit
• B. COM/DCOM toolkit
• C. ORE toolkit
• D. OLE DB toolkit

Explanation: GNOME historically used CORBA for communication between desktop components, commonly through the ORBit implementation.

• A. Layer 4 protocols
• B. Layer 5 protocols
• C. Layer 6 protocols
• D. Layer 7 protocols

Explanation: OSI Layer 7, the application layer, provides network services directly to user applications, including file transfer and network…

• A. fdisk
• B. fsck
• C. dd
• D. rawrite

Explanation: The `dd` command copies data byte by byte between devices or image files, so it can write a boot image directly to a floppy.

• A. utilinux
• B. cempre
• C. switchdesk
• D. window

Explanation: `switchdesk` was a Red Hat Linux utility for selecting the default X Window desktop environment, such as KDE or GNOME.

• A. path
• B. pwd
• C. prompt $p$g
• D. dir

Explanation: `pwd` means print working directory and displays the full path of the directory in which the shell is currently operating.