CBSE Class 12 - Computer Science - C++ - Board Questions on Header Files

Board Questions On Header Files

There is 1 or 2 Marks questions based on function mapping to header files

Q1(CBSE 2012): Write the names of the header file to which of the following belong:

   (i) sqrt( )
   (ii) randomize()

Answer: (i) math.h
              (ii) stdlib.h

Q2: Name the header file that will be needed for the following code:

   void main()
   {
     char word [] = "Board Examination";
  cout << setw(20) << word;
   }   

Answer: iostream.h (for cout), iomanip.h (for setw)

Q3(CBSE 2012): Which C++ header file(s) are especially required to be included to run the following C++ code. (Note: Do not include any header which is/are not required):

   void main()
   {
      char TEXT[] = "something";
   cout << "Remaining SMS chars: " << 160 - strlen(TEXT) << endl;
   }

Answer: iostream.h (for cout), string.h (for strlen)

Q4(CBSE 2013): Observe the following C++ code and write name(s) of the header file(s) which will be essentially required to run in a C++ compiler:

    void main()  
 {
     int number;
  cin >> number;
  if (abs(number) == number)
    cout << "positive" << endl;
 }

Answer: iostream.h (for cin, cout), math.h (for abs)

CBSE Class 6 - Science - CH5 - Separation of Substances (MCQs-2)

Separation of Substances 

(MCQs)

Threshing (courtsey: wikipedia)

Q1: The method of separating substances based on size, colour and shape is called _______.

(a) Handpicking
(b) Winnowing
(c) Sieving
(d) Threshing

Q2: The process used for separating grains from stalk is called _________.

(a) Winnowing
(b) Sieving
(c) Threshing
(d) Decanting

Q3: Which method is commonly used by farmers to separate lighter husk particles from heavier seeds of grain.

(a) Winnowing
(b) Sieving
(c) Threshing
(d) Decanting


Q4: Pebbles and stones are removed from sand by ________

(a) Winnowing
(b) Sieving
(c) Threshing
(d) Decanting


Q5: The heavier component in a mixture settles after water is added to it, the process is called ________

CBSE Class 12 - Business Studies - CH6 - Staffing (V Short Q and A)

Staffing 

V Short Q & A

Q1: Which function of management helps in obtaining right people and putting them on the right jobs?

Answer: Staffing

Q2: Is Human resource management a part of staffing? Say Yes or No.

Answer: No

Q3: Name the process which is related to searching for prospective candidates for vacant job position?

Answer: Recruitment

Q4: Why induction is not mandatory in when an employee is promoted to new position/department?

Answer: Because employee is already familiar with organization. It is a type of internal source selection.

Q5: What is job description?

Answer: It is a document which describes roles, responsibilities and relation of one job with other job.

Q6: Name the steps involved in process of staffing.

Answer:
     i.    Man power planning
ii.   Recruitment
iii.  Selection
iv.   Placement
v.    Induction
vi.   Training and Development
viii. Performance Appriasial
ix.   Promotion and Career planning
x.    Compenstion

CBSE Class 6 - Science - CH3 - Fibres to Fabrics (MCQs)

Fibres to Fabrics

 MCQs

Cotton Bolls
(source:wpclipart.com)

Q1: The thinner strands of thread are called as _________
(a) Fibres
(b) Fabric
(c) yarns
(d) cotton bolls


Q2: Which one of the following is NOT a natural fibre?

(a) Cotton
(b) Jute
(c) Nylon
(d) Wool


Q3: Which one of the following is NOT a synthetic fibre?
(a) polyster
(b) nylon
(c) acrylic
(d) silk

Q4: The fruits of the cotton plant are called ________.

(a) bolls
(b) jute
(c) yarn
(d) cushions

Q5: Which of the following is animal natural fibre?

CBSE Class 12 - Computer Science - Board Questions on Inheritance

C++ Inheritance Questions 

Asked in Board Examination

Q&A

Q1(CBSE 2004): What is inheritance? Give an example in C++ to show its implementation in C++.

Answer: Inheritance is the process of forming a new class from an existing or base class. The base class is also known as parent class or super class. It allows the new class (called derived class) to inherit properties of its parent class.Inheriatnce helps in reusability of code.
For example, a class Truck inherits from class Automobiles which itself inherits from another class vehicles.

Q2(CBSE 2004): Given the following class definitions, answer the following questions.

   class Book 
   {
      char title[20];
      char author[20];
      int no_of_pages;
      public:
        void read( );
     void show( );
   };
   
   class TextBook : private Book
   {
      int no_of_chapters, no_of_assignments;
      protected:
         int standard;
      public:
         void readtextbook( );
      void showtextbook( );
   };
   
   class PhysicsBook : public TextBook
   {
       char topic[20];
    public:
       void readphysicsbook( );
       void showphysicsbook( );
   };
  

(i) Name the members, which can be accessed from the member functions of class PhysicsBook.
(ii) Name the members, which can be accessed by an object of class TextBook.
(iii) Name the members which can be accessed by an object of class Physicsbook.
(iv) What will be the size of an object (in bytes) of class Physicsbook?

Answer: (i) no_of_chapters, no_of_assignments, standard, topic, readtextbook(), showtextbook(), readphysicsbook() and showphysicsbook().

(ii) read(), show(), readtextbook(), showtextbook()

(iii) readtextbook(), showtextbook(), readphysicsbook() and showphysicsbook()

(iv)20 + 20 + 2 + 2 + 2 + 2 + 20 = 68 bytes.

Q3 (CBSE 2013): Consider the following c++ code and answer the questions (i) to (iv):

CBSE Class 12 - Business Studies - CH5 - Organising (V Short Q and A)

Organizing

V Short Q & A

Q1: Define Organising.

Answer: Organizing is the process of defining and grouping, activities and establishing authority relationships among them.

Q2: Name the organization which is deliberately created?

Answer:  Formal Organisation

Q3: Define organisation.

Answer: Organisation is a structure constituting a system of job positions, the roles assigned tothem and the authoring relationship among various positions.

Q4: Name and explain the two steps in the process of organizing which comes after identification and division of work and departmentalization.

Answer: Assignment of duties and establishing reporting relation ships.

Q5: Which level of managers are responsible for determining formal organisation?

Answer: Top Level Management.

Q6: List the important steps in organising process.

CBSE Class 7 - Science - CH6 - Physical and Chemical Changes (MCQs)

Physical and Chemical Changes

MCQs

Is burning a match stick
physical change or chemical?

Q1: Which of the following is a physical change?

(a) Rusting of Iron
(b) Heating of Iron
(c) Burning of Wood
(d) Ripening of a fruit.

Q2: Which of the following is a chemical change?

(a) Boiling of Water
(b) Tearing of Newspaper
(c) Cooking a vegetable
(d) Freezing water into ice

Q3: Which of the following is NOT a physical property of a substance?

(a) shape
(b) color
(c) density
(d) flammability

Q4: Which of the following MIGHT NOT tell a chemical change has taken place?

(a) Evolution of gas.
(b) Light is generated
(c) Production of heat
(d) Converting liquid into gas.

Q5: Turning milk into curd is a