Question Discussion & Solution

Given series.- 34, 41, 48, 55, 62, 69, ?

We add seven in each number we get-

Hence, "76" is the correct answer.

The correct answer is Copper.

Key Points

• Conductor of electricity
  • In physics and electrical engineering, a conductor is an object or type of material that allows the flow of charge in one or more directions.
  • Materials made of metal are common electrical conductors. 
  • Copper is considered to be a conductor because it conducts the electron current or flow of electrons fairly easily. Most metals are considered to be good conductors of electrical current. Copper is just one of the more popular materials that are used for conductors. Hence, Option 4 is correct.
  • If you have to define the meaning of electrical conductors in the simplest way, they are materials that allow electricity to flow through them easily.
  • If we compare two types of material and the first one allows better flow of electricity through it, then that material is said to be a good conductor of electricity.
  • An electrical conductor allows the electric charges to easily flow through them. The property of conductors to conduct electricity is called conductivity.
  • Such materials offer less opposition or resistance to the flow of charges.
  • Conducting materials allow easy charge transfer because of the free movement of electrons through them.

Additional Information

• • Some examples of conductors of electricity are
    • Copper
    • Aluminum
    • Silver
    • Gold
    • Graphite
    • Platinum
    • Water
    • People

Important functions of a database administrator are:

• Schema definition schema and physical organization modification granting of authorization for data access
• Monitoring jobs running on the database and ensuring that performance is not degraded by very expensive tasks submitted by some users.
• Routine maintenance includes activities like periodic ensuring that backup and enough freedisk space is available for normal operations and upgrading disk space as required.

Systems software are programs that manage the resources of the computer system and simplify applications programming.

 Key PointsSystems software includes software such as the operating system, database management systems, networking software, translators, and software utilities.

Systems software can be categorized under the following:

• Operating system: Harnesses communication between hardware, system programs, and other applications.
• Device driver: Enables device communication with the OS and other programs.
• Firmware: Enables device control and identification.
  • Firmware is the operational software embedded within a flash, ROM, or EPROM memory chip for the OS to identify it.
  • It directly manages and controls all activities of any single hardware.
• Translator: Translates high-level languages to low-level machine codes.
  • A compiler is a computer program that translates computer code written in one programming language into another language.
  • The name "compiler" is primarily used for programs that translate source code from a high-level programming language to a lower-level language to create an executable
• software utility: Ensures optimum functionality of devices and applications.

Additional Information

• Word processor is a computer program used to write and revise documents, compose the layout of the text, and preview on a computer monitor how the printed copy will appear. For example, google docs, Microsoft word.

Hence word processor is not system software.

The pattern followed here is:

This is an alternate series of subtraction. The first number is subtracted by 2 to get the second number and then 4 is subtracted from the second number to get the third number and so on.

Hence, 42 is the correct answer.