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The correct CHOICE is (a) int peek()

The best EXPLANATION: OBTAINS the next character from the input STREAM, but does not remove that character. RETURNS –1 if no character is available.

The CORRECT answer is (B) int Read(char[] BUFFER, int index, int count)

The explanation is: Attempts to read the count characters into buffer starting at buffer[count], returning the number of characters successfully read.

The CORRECT ANSWER is (C) int ReadBlock(char[ ] buffer, int INDEX, int count)

To explain: Attempts to read the count characters into buffer starting at buffer[index], returning the number of characters SUCCESSFULLY read.

The CORRECT option is (a) StreamReader

For explanation: In general, to perform character-based file operations, wrap a FILESTREAM inside a StreamReader or a STREAMWRITER. These classes automatically CONVERT a byte STREAM into a character stream, and vice versa.

Right answer is (a) they OPERATE directly on unicode characters

To explain I WOULD say: Although byte-oriented file HANDLING is quite common, it is possible to use character-based streams for this purpose. The advantage of the character streams is that they operate directly on Unicode characters. THUS, if you want to store Unicode text, the character streams are CERTAINLY the best option.

The correct CHOICE is (a) TEXTWRITER

Easiest explanation - STREAMWRITER is DERIVED from TextWriter. To create a character-based output stream, WRAP a Stream object (such as a FileStream) inside a StreamWriter.

The correct ANSWER is (b) FLUSH()

Easiest EXPLANATION - NONE.

The CORRECT CHOICE is (b) FileMode.Create

The EXPLANATION: CREATES a new output FILE. Any pre-existing file with the same name will be destroyed.

Correct option is (a) FileMode.CreateNew

The EXPLANATION: CREATES a new OUTPUT file. The file must not already be EXISTING.

The correct ANSWER is (a) long LENGTH

Best explanation: This PROPERTY contains the length of the STREAM. This property is read-only.

Correct option is (d) UnmanagedMemoryStream

Easy explanation - A byte STREAM that USES UNMANAGED MEMORY for storage.

Right CHOICE is (C) MemoryStream

To explain: A byte STREAM that USES memory for STORAGE.

Correct CHOICE is (a) INPUTSTREAM

To explain I WOULD say: InputStream & OutputStream are designed for byte stream. READER and writer are designed for character stream.

Correct OPTION is (d) NONE of the mentioned

To EXPLAIN I would say: Every METHOD of OutputStream RETURNS void and throws an IOExeption in case of errors.

The CORRECT ANSWER is (c) Sets the current position in the stream to the SPECIFIED offset from specified origin and HENCE returns the new position

To explain I would say: LONG Seek(long offset, SeekOrigin origin)

Sets the current position in the stream to the specified offset from the specified origin. It returns the new position.

The correct option is (b) int ReadByte()

Easy EXPLANATION - Returns an integer representation of the next available BYTE of input. Returns –1 when the end of the FILE is ENCOUNTERED.

Correct ANSWER is (c) void FLUSH()

EASIEST explanation - The method used to write the contents of the stream to the PHYSICAL device.

Correct option is (C) void close()

The BEST I can explain: void close() CLOSES the STREAM.

Correct answer is (a) System.IO.stream

The best explanation: The core stream class is System.IO.Stream. Stream represents a BYTE stream and is a base class for all other stream classes. It is also ABSTRACT, which MEANS that you cannot instantiate a Stream object. Stream DEFINES a set of STANDARD stream operations.

The correct ANSWER is (a) System.IO

To EXPLAIN: The core STREAM classes are defined within the System.IO namespace. To use these classes, you will usually include the following STATEMENT near the top of your program: using System.IO;

The correct OPTION is (c) System.Text

Explanation: The system.text NAMESPACE CONTAINS the Stringbuilder class and hence MUST include USING system.text for manipulating the mutable strings.

Right answer is (b) StringBuilder()

Easiest EXPLANATION - MUTABLE STRINGS are dynamic strings. They can GROW dynamically as characters are added to them. stringbuilder class supports those METHODS that are useful for manipulating dynamic strings.

The CORRECT OPTION is (c) replace() method replaces all instances ofa character with NEW character

Explanation: REVERSE() and replace() are by definition.

Right answer is (b) InputOutputStream

For explanation: BYTE STREAM uses INPUTSTREAM and OutputStream classes for INPUT and output operation.

The CORRECT ANSWER is (a) ReadByte()

EASIEST EXPLANATION - NONE.

The CORRECT ANSWER is (d) I/O EXCEPTION ERROR

The BEST I can explain: None.

The correct option is (b) ReadKey()

To EXPLAIN I would say: The .NET FRAMEWORK includes a method in Console that enables you to read individual keystrokes directly from the KEYBOARD, in a non-line-buffered manner. This method is called ReadKey(). When it is called, it WAITS until a key is pressed. When the key is pressed, ReadKey( ) returns the keystroke immediately.

The CORRECT CHOICE is (C) StringWriter

Best explanation: The STREAM class method writes characters to the STRING.

Correct CHOICE is (a) Console.In

The BEST I can explain: Console.In is an instance(OBJECT) of TextReader class and we can use the methods and properties DEFINED by TextReader to invoke the object console.in.

Right OPTION is (c) -1

To explain I would say: READ() RETURNS –1 on ERROR. This method also throws an IOEXCEPTION on failure.

The CORRECT option is (c) Integer

The BEST explanation: Read() returns the character read from the console. It returns the RESULT. The character is returned as an int, which should be CAST to char.

Right option is (C) Read(), READLINE(), ReadKey()

For explanation: The TWO METHOD Read() and ReadLine() AVAILABLE in .NET Framework 1.0 and Third method ReadKey() was added by .NET Framework 2.0.

Right ANSWER is (B) 3

For explanation: Two basic methods : read() and READLINE() and third method readkey() introduced in .NET FRAMEWORK 2.0.

Correct option is (c) Console.In

Explanation: Console.In is an INSTANCE of TEXTREADER, and we can use the methods and properties DEFINED by TextReader to access it to read the INPUT from the keyboard.

The correct option is (d) System.Console

To explain I would say: The method for READING and writing to the console in C#.NET is provided by System.Console class. This class GIVES us ACCESS to the standard INPUT, output and standard error streams.

Right choice is (a) An ATTRIBUTE can be inspected at LINK time

Easiest EXPLANATION - NONE.