Cpp Quiz interview questions – page 2

A virtual base class is useful when

1. It makes sense to use a base class is ambiguous
2. Identification of a function in a base class is ambiguous
3. There are multiple paths from one derived class to another
4. Different functions in base and derived classes have the same name

The keyword void is used to declare

1. Objects that can be modified outside of program control
2. A synonym for an existing type
3. A member function that is defined in a subclass
4. Absence of a type

Virtual functions allow to

1. Use same function call to execute member functions of objects from different classes
2. Group objects of different classes so they can all be accessed by the same function code
3. Create functions that have no body
4. Create an array of type pointer to base calls that can hold pointers to derived classes

Redirection redirects

1. Screen from a device to a stream
2. A device from the screen to a file
3. A stream from a file to the screen
4. A file from a device to a stream

Memorizing the new items used in C++ is

1. Critically important
2. Completely irrelevant
3. The key to wealth and success
4. Something you can return to later

The scope resolution operator usually

1. Providing a useful conceptual frame work
2. Specifies a particular class
3. Tells what base class is derived from
4. Limits the visibility of variables to a certain function

An enumerated data type brings together a group of

1. Constant values, integers with user defined names
2. Related data type
3. Items of different data type
4. All of these

A variable defined within a block is visible

1. From the point of definition onward in the block
2. From the point of definition on ward in the function
3. From the point of definition on ward in the program
4. Throughout the function

The library function exit( ) causes an exit from

1. The program in which it occurs
2. The function in which it occurs
3. The block in which it occurs
4. The loop in which it occurs

The names beginning with an underscore are reserved for _____ variable.

1. Globar
2. Local
3. Internal system
4. External system

____ literals are treated as array of characters.

1. Graphic
2. Character
3. String
4. Non-graphic

Which one holds the values or constants in memory boxes?

1. Variable
2. While
3. Goto
4. Switch

In which type of constant the Decimal numbers, integer and floating-point are related?

1. Numeric
2. String
3. Char
4. Boolean

The basic types are collectively called as ___

1. Looping
2. Tokens
3. Expression
4. Variables

____ are data items whose value cannot be changed.

1. Class
2. Return
3. Constants
4. Variable

Which punctuator is used to group a set of C++ statements?

1. {}
2. []
3. ()
4. /

____ refers to the process of changing the data type of the value stored in a variable.

1. Type char
2. Type int
3. Type float
4. Type cast

____ data types are structure, union, class and enumeration.

1. Derived
2. Integer
3. Built-in
4. User defined

Which operator is used to compare numerical values?

1. Relational
2. Conditional
3. Assignment
4. Arithmetic

____ allocates memory, based on the data type of the variable.

1. Interpreter
2. Link
3. Converter
4. Compiler

Every variable will be referred by its ___

1. Data
2. Int
3. Name
4. Address

Which storage class defines local variable known to the block in which they are defined?

1. Register
2. Auto
3. Extern
4. Static

____ allows users to define the user defined data type identifier.

1. Class
2. Data
3. Identifier
4. Type definition

What is the length of long double data type?

1. 8
2. 16
3. 32
4. 80

When a=6 and c=a++ what is the value of c?

1. 6
2. 7
3. 8
4. 9

The statement int A; b; is invalid because ____

1. Variables should be separated by Comma
2. Capital A is not allowed
3. Only one variable should be given
4. All of these

What is the default file extension for all Word documents?

1. FIL
2. DOC
3. WRD
4. TXT

The ____ key and the ___ key can be used in combination with other keys to perform shortcuts and special tasks.

1. Control, Alt
2. Function, toggle
3. Delete, Insert
4. Caps Lock, Num Lock

How many operators are classified in C++?

1. 11
2. 13
3. 14
4. 15

____ is the C increment Operator in C++.

1. ++
2. +*
3. *+
4. --