Question Discussion & Solution

Deletion takes place at the FRONT of the queue.

96 is the largest element in the given queue.

1^st deque operation:

28 is deleted

2^nd deque operation:

15 is deleted

3^rd operation:

19 is deleted

4^th operation:

68 is deleted

5^th operation:

96 is deleted

The correct answer is Dot Matrix.

Important Points

• Impact printer
  • Impact printer refers to a class of printers that work by banging a head or needle against an ink ribbon to make a mark on the paper.
  • The three most common forms of impact printers are:
    • Dot-matrix.
    • Daisy-wheel.
    • Line printers.

Key Points

• Dot-matrix Printers 
  • The technology behind dot-matrix printing is in such a way that the paper is pressed against a drum (a rubber-coated cylinder).
  • The electromagnetically-driven printhead moves across the paper and strikes the printer ribbon situated between the paper and printhead pin.
  • The impact of the printhead against the printer ribbon imprints ink dots on the paper which create human-readable characters.

Additional Information

• Laser Printer
  • ​A laser printer is a printer that uses a focused beam of light to transfer text and images onto paper. 
• Inkjet printer
  • ​Inkjet printers, as the name implies, use ink to print text, graphics, and images onto various types of paper. 
  • Inkjet printers, cartridges, and supplies are more widely available therefore cheaper than their thermal printer.
• Thermal printer​
  • Thermal printers use tiny heating elements to activate or transfer pigments.
  • Thermal printers are used most commonly to create labels, safety signs.

1. Some students can either be mischievous or Intelligent.

2. Some Intelligent person can either be mischievous or students.

Thus there are some relation between all the three i.e students, intelligent and mischievous

Now, according to this, the most suitable Venn diagram is-

Hence, Option (4) is correct.

Additional InformationMischievous: A person likes to have fun by playing harmless tricks on people or doing things they are not supposed to do.

The correct answer is Scanner.

Key Points

• Scanner:
  • Scanner is an input device and can be used to scan images as well as text documents.
  • Scanner is not a pointing input device.
• ​Pointing device
  • A pointing device is an input interface that allows a user to input spatial data to a computer. 
  • Common pointing devices
    • Mouse
    • Trackball
    • Joystick
    • Pointing stick
    • Wii Remote
    • Finger tracking
    • Graphics tablet
    • Stylus
    • Finger tracking

Additional Information

• Track Ball:
  • The trackball is a pointing device consisting of a ball housed in a socket containing sensors to detect rotation of the ball about two axes, similar to an upside-down mouse..
  • Tracker balls are commonly used on CAD workstations​
• Digitizing Tablet:
  • A digitizer tablet is a peripheral device that allows users to draw on a computer screen.
• Joystick:
  • A joystick is a lever-type device that can be moved in several directions.
  • Used to control the movement of an image on a computer or similar display screen.

Concept:

Meaning of i++:

First, we read the i than after reading the value of i we are going to increment i this is nothing but post-increment.

Meaning of ++i: 

First, we increment i than we read the value of I, this is nothing but pre-increment:

Examine code:

int main( )
{
int i = 10;
int C = i++;   // assign i to C therefore C = 10 after assigning increment i by 1
printf("i = %d, C =  %d", i, C);
return 0;
}

Output:

i = 11, C =  10

Therefore value of i to be assigned to C, and then I to be incremented by 1