Quiz 2

An electric heater draws 3.5 A from a 110 V source. The resistance of the heating element is approximately

• 385 ohm

• 38.5 ohm

• 3.1 ohm

• 31 ohm

The formula to find I when the values of V and R are known is

• I = VR

• I = R/V

• V = IR

• I = V/R

A resistor is connected across a 50 V source. What is the current in the resistor if the color code is red, orange, orange, silver?

• 2 mA

• 2.2 mA

• 214 mA

• 21.4 mA

When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is

• overheated

• shorted

• open

• reversed

In 0.025 W, there are

• 25 kW

• 0.00025 mW

• 2,500 µW

• 25 mW

The keyword used to transfer control from a function back to the calling function is

• switch

• goto

• go back

• return

What is (void*)0?

• Representation of NULL pointer

• Representation of void pointer

• Error

• None of the above

In which header file is the NULL macro defined?

• stdio.h

• stddef.h

• stdio.h and stddef.h

• math.h

Which header file should be included to use functions like malloc() and calloc()?

• memory.h

• stdlib.h

• string.h

• dos.h

Specify the 2 library functions to dynamically allocate memory?

• malloc() and memalloc()

• alloc() and memalloc()

• malloc() and calloc()

• memalloc() and faralloc()